/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops/heavy-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:33:22,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:33:22,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:33:22,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:33:22,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:33:22,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:33:22,103 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:33:22,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:33:22,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:33:22,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:33:22,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:33:22,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:33:22,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:33:22,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:33:22,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:33:22,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:33:22,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:33:22,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:33:22,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:33:22,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:33:22,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:33:22,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:33:22,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:33:22,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:33:22,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:33:22,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:33:22,156 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:33:22,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:33:22,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:33:22,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:33:22,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:33:22,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:33:22,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:33:22,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:33:22,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:33:22,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:33:22,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:33:22,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:33:22,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:33:22,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:33:22,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:33:22,197 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:33:22,225 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:33:22,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:33:22,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:33:22,227 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:33:22,228 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:33:22,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:33:22,228 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:33:22,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:33:22,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:33:22,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:33:22,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:33:22,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:33:22,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:33:22,230 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:33:22,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:33:22,230 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:33:22,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:33:22,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:33:22,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:33:22,231 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:33:22,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:33:22,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:33:22,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:33:22,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:33:22,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:33:22,232 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:33:22,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:33:22,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:33:22,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:33:22,233 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:33:22,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:33:22,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:33:22,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:33:22,680 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:33:22,681 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:33:22,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-1.c [2020-10-27 20:33:22,759 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9be05b399/604cea3fdb574a6c9df15a9e90af717b/FLAGffb55d21e [2020-10-27 20:33:23,417 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:33:23,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/heavy-1.c [2020-10-27 20:33:23,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9be05b399/604cea3fdb574a6c9df15a9e90af717b/FLAGffb55d21e [2020-10-27 20:33:23,772 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9be05b399/604cea3fdb574a6c9df15a9e90af717b [2020-10-27 20:33:23,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:33:23,782 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:33:23,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:33:23,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:33:23,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:33:23,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:33:23" (1/1) ... [2020-10-27 20:33:23,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d1b254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:33:23, skipping insertion in model container [2020-10-27 20:33:23,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:33:23" (1/1) ... [2020-10-27 20:33:23,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:33:23,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:33:23,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:33:24,029 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:33:24,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:33:24,116 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:33:24,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:33:24 WrapperNode [2020-10-27 20:33:24,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:33:24,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:33:24,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:33:24,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:33:24,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:33:24" (1/1) ... [2020-10-27 20:33:24,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:33:24" (1/1) ... [2020-10-27 20:33:24,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:33:24" (1/1) ... [2020-10-27 20:33:24,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:33:24" (1/1) ... [2020-10-27 20:33:24,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:33:24" (1/1) ... [2020-10-27 20:33:24,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:33:24" (1/1) ... [2020-10-27 20:33:24,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:33:24" (1/1) ... [2020-10-27 20:33:24,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:33:24,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:33:24,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:33:24,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:33:24,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:33:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:33:24,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:33:24,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:33:24,266 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:33:24,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:33:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:33:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:33:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:33:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:33:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:33:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:33:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:33:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:33:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:33:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-10-27 20:33:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:33:24,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:33:24,792 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:33:24,792 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 20:33:24,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:33:24 BoogieIcfgContainer [2020-10-27 20:33:24,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:33:24,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:33:24,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:33:24,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:33:24,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:33:23" (1/3) ... [2020-10-27 20:33:24,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1bb678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:33:24, skipping insertion in model container [2020-10-27 20:33:24,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:33:24" (2/3) ... [2020-10-27 20:33:24,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1bb678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:33:24, skipping insertion in model container [2020-10-27 20:33:24,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:33:24" (3/3) ... [2020-10-27 20:33:24,811 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-1.c [2020-10-27 20:33:24,827 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:33:24,834 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:33:24,851 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:33:24,899 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:33:24,899 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:33:24,899 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:33:24,900 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:33:24,900 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:33:24,900 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:33:24,900 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:33:24,900 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:33:24,925 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-27 20:33:24,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-27 20:33:24,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:24,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:24,934 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:24,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:24,944 INFO L82 PathProgramCache]: Analyzing trace with hash 910173467, now seen corresponding path program 1 times [2020-10-27 20:33:24,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:24,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071712240] [2020-10-27 20:33:24,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:25,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:25,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:25,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:33:25,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:25,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-27 20:33:25,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:25,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:25,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:33:25,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:25,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:33:25,465 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-27 20:33:25,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:25,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:25,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:25,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:25,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:25,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-27 20:33:25,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:25,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:25,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:25,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:25,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:25,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071712240] [2020-10-27 20:33:25,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:33:25,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:33:25,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42321888] [2020-10-27 20:33:25,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:33:25,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:25,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:33:25,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:33:25,610 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-10-27 20:33:25,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:25,707 INFO L93 Difference]: Finished difference Result 46 states and 67 transitions. [2020-10-27 20:33:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:33:25,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-27 20:33:25,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:25,719 INFO L225 Difference]: With dead ends: 46 [2020-10-27 20:33:25,719 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 20:33:25,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:33:25,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 20:33:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2020-10-27 20:33:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 20:33:25,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-27 20:33:25,765 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-10-27 20:33:25,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:25,766 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-27 20:33:25,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:33:25,766 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-27 20:33:25,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-27 20:33:25,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:25,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:25,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:33:25,768 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:25,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:25,769 INFO L82 PathProgramCache]: Analyzing trace with hash 909279737, now seen corresponding path program 1 times [2020-10-27 20:33:25,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:25,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999003991] [2020-10-27 20:33:25,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:25,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:25,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:25,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:33:25,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:25,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-27 20:33:25,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:25,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:33:25,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:33:25,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:33:25,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:25,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:25,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:26,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:26,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:26,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:26,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 20:33:26,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:26,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:26,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:26,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:26,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:33:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:26,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999003991] [2020-10-27 20:33:26,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:33:26,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:33:26,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682718680] [2020-10-27 20:33:26,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:33:26,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:26,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:33:26,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:33:26,040 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2020-10-27 20:33:26,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:26,281 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-10-27 20:33:26,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:33:26,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-27 20:33:26,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:26,283 INFO L225 Difference]: With dead ends: 37 [2020-10-27 20:33:26,284 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:33:26,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:33:26,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:33:26,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 17. [2020-10-27 20:33:26,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 20:33:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-27 20:33:26,293 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-10-27 20:33:26,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:26,293 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-27 20:33:26,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:33:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-27 20:33:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:33:26,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:26,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:26,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:33:26,295 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:26,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:26,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1010247195, now seen corresponding path program 1 times [2020-10-27 20:33:26,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:26,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621393446] [2020-10-27 20:33:26,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:26,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:26,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:26,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:26,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:33:26,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:33:26,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-27 20:33:26,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:26,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:33:26,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:33:26,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:33:26,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:33:26,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:26,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:26,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:26,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:26,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:26,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 20:33:26,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:26,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:26,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:26,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:26,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:26,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621393446] [2020-10-27 20:33:26,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:33:26,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:33:26,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30897184] [2020-10-27 20:33:26,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:33:26,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:26,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:33:26,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:33:26,718 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2020-10-27 20:33:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:26,894 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-27 20:33:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:33:26,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-27 20:33:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:26,896 INFO L225 Difference]: With dead ends: 41 [2020-10-27 20:33:26,896 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 20:33:26,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:33:26,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 20:33:26,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 18. [2020-10-27 20:33:26,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:33:26,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-27 20:33:26,903 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-10-27 20:33:26,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:26,904 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-27 20:33:26,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:33:26,904 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-27 20:33:26,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:33:26,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:26,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:26,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:33:26,905 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:26,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:26,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1746096605, now seen corresponding path program 1 times [2020-10-27 20:33:26,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:26,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697381354] [2020-10-27 20:33:26,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:26,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:26,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:26,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:27,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:27,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:33:27,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:33:27,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-27 20:33:27,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:27,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:33:27,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:33:27,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:33:27,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:27,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:27,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:27,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:27,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:27,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:27,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:33:27,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:27,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:27,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:27,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:27,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:27,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697381354] [2020-10-27 20:33:27,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:33:27,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:33:27,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637128578] [2020-10-27 20:33:27,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:33:27,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:27,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:33:27,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:33:27,658 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-10-27 20:33:27,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:27,769 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-10-27 20:33:27,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:33:27,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 20:33:27,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:27,771 INFO L225 Difference]: With dead ends: 33 [2020-10-27 20:33:27,771 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 20:33:27,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:33:27,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 20:33:27,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-10-27 20:33:27,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 20:33:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-27 20:33:27,778 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-27 20:33:27,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:27,778 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-27 20:33:27,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:33:27,778 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-27 20:33:27,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:33:27,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:27,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:27,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:33:27,780 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:27,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:27,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1061756513, now seen corresponding path program 1 times [2020-10-27 20:33:27,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:27,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154022446] [2020-10-27 20:33:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:27,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:27,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:27,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:28,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:28,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:33:28,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:33:28,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-10-27 20:33:28,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:28,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:33:28,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:33:28,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:33:28,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:28,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:28,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:28,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:28,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:28,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:28,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:28,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:33:28,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:28,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:28,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:28,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:28,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:28,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154022446] [2020-10-27 20:33:28,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:28,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:33:28,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225185966] [2020-10-27 20:33:28,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:33:28,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:28,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:33:28,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:33:28,901 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-10-27 20:33:29,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:29,010 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-10-27 20:33:29,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:33:29,010 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-27 20:33:29,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:29,011 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:33:29,011 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 20:33:29,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:33:29,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 20:33:29,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-27 20:33:29,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 20:33:29,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-27 20:33:29,018 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2020-10-27 20:33:29,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:29,018 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-27 20:33:29,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:33:29,019 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-27 20:33:29,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:33:29,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:29,020 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:29,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:33:29,020 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:29,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:29,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2125826273, now seen corresponding path program 2 times [2020-10-27 20:33:29,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:29,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396048140] [2020-10-27 20:33:29,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:29,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:29,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:29,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:31,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:31,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:33:31,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:33:31,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2121 [2020-10-27 20:33:31,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:31,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:33:31,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:33:31,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:33:31,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:31,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:31,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:31,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:31,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:31,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:31,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:33:31,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:31,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:31,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:31,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:31,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:31,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396048140] [2020-10-27 20:33:31,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:31,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:33:31,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938857356] [2020-10-27 20:33:31,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:33:31,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:31,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:33:31,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:33:31,274 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-10-27 20:33:31,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:31,413 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-27 20:33:31,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:33:31,414 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-27 20:33:31,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:31,414 INFO L225 Difference]: With dead ends: 40 [2020-10-27 20:33:31,415 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 20:33:31,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:33:31,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 20:33:31,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-27 20:33:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 20:33:31,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-27 20:33:31,426 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-27 20:33:31,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:31,428 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-27 20:33:31,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:33:31,428 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-27 20:33:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:33:31,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:31,429 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:31,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:33:31,430 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:31,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:31,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1213765725, now seen corresponding path program 3 times [2020-10-27 20:33:31,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:31,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308663082] [2020-10-27 20:33:31,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:31,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:31,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:31,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:35,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:35,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:33:35,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:33:35,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4355 [2020-10-27 20:33:35,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:35,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:33:35,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:33:35,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:33:35,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:35,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:35,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:35,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:35,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:35,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:35,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:33:35,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:35,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:35,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:35,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:35,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:35,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308663082] [2020-10-27 20:33:35,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:35,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:33:35,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031528535] [2020-10-27 20:33:35,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:33:35,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:35,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:33:35,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:33:35,947 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 7 states. [2020-10-27 20:33:36,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:36,109 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-10-27 20:33:36,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:33:36,110 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-27 20:33:36,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:36,111 INFO L225 Difference]: With dead ends: 44 [2020-10-27 20:33:36,111 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 20:33:36,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:33:36,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 20:33:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-10-27 20:33:36,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 20:33:36,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-27 20:33:36,124 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-10-27 20:33:36,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:36,125 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-27 20:33:36,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:33:36,125 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-27 20:33:36,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:33:36,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:36,127 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:36,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:33:36,128 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:36,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:36,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2073861605, now seen corresponding path program 4 times [2020-10-27 20:33:36,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:36,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643093844] [2020-10-27 20:33:36,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:36,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:36,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:36,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:41,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:41,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:33:41,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:33:41,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-27 20:33:41,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:41,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:33:41,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:33:41,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:33:41,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:41,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:41,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:41,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:41,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:41,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:41,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:33:41,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:41,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:41,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:41,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:41,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:41,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643093844] [2020-10-27 20:33:41,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:41,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:33:41,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323657512] [2020-10-27 20:33:41,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:33:41,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:41,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:33:41,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:33:41,387 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2020-10-27 20:33:41,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:41,601 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-10-27 20:33:41,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:33:41,602 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-27 20:33:41,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:41,603 INFO L225 Difference]: With dead ends: 48 [2020-10-27 20:33:41,603 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 20:33:41,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:33:41,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 20:33:41,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-27 20:33:41,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 20:33:41,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-27 20:33:41,611 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-10-27 20:33:41,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:41,611 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-27 20:33:41,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:33:41,612 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-27 20:33:41,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:33:41,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:41,613 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:41,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:33:41,613 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:41,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:41,614 INFO L82 PathProgramCache]: Analyzing trace with hash 387795879, now seen corresponding path program 5 times [2020-10-27 20:33:41,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:41,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049886412] [2020-10-27 20:33:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:41,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:41,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:41,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:46,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:46,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:33:46,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:33:46,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 20:33:46,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:46,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:33:46,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:33:46,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:33:46,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:46,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:46,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:46,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:46,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:46,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:46,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:33:46,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:46,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:46,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:46,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:46,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:33:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:46,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049886412] [2020-10-27 20:33:46,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:46,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:33:46,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028359023] [2020-10-27 20:33:46,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:33:46,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:46,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:33:46,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:33:46,818 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 9 states. [2020-10-27 20:33:47,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:47,034 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-10-27 20:33:47,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:33:47,035 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-27 20:33:47,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:47,036 INFO L225 Difference]: With dead ends: 52 [2020-10-27 20:33:47,036 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 20:33:47,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:33:47,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 20:33:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-27 20:33:47,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 20:33:47,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 20:33:47,049 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2020-10-27 20:33:47,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:47,050 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 20:33:47,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:33:47,050 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 20:33:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:33:47,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:47,053 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:47,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:33:47,054 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:47,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:47,054 INFO L82 PathProgramCache]: Analyzing trace with hash -718696215, now seen corresponding path program 6 times [2020-10-27 20:33:47,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:47,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050507728] [2020-10-27 20:33:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:47,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:47,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:47,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:52,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:52,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:33:52,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:33:52,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-27 20:33:52,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:52,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:33:52,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:33:52,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:33:52,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:52,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:52,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:52,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:52,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:52,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:52,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:33:52,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:52,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:52,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:52,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:52,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:33:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:52,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050507728] [2020-10-27 20:33:52,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:52,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:33:52,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299662075] [2020-10-27 20:33:52,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:33:52,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:52,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:33:52,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:33:52,359 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2020-10-27 20:33:52,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:52,603 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-10-27 20:33:52,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:33:52,604 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-27 20:33:52,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:52,605 INFO L225 Difference]: With dead ends: 56 [2020-10-27 20:33:52,605 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 20:33:52,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:33:52,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 20:33:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-27 20:33:52,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 20:33:52,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-27 20:33:52,618 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2020-10-27 20:33:52,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:52,620 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-27 20:33:52,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:33:52,620 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-27 20:33:52,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:33:52,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:52,622 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:52,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:33:52,622 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:52,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:52,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1094290859, now seen corresponding path program 7 times [2020-10-27 20:33:52,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:52,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64319414] [2020-10-27 20:33:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:52,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:52,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:53,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:57,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:57,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:33:57,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:33:57,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 20:33:57,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:57,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:33:57,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:33:57,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:33:57,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:57,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:57,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:57,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:57,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:57,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:57,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:33:57,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:57,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:57,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:57,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:57,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:57,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64319414] [2020-10-27 20:33:57,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:57,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:33:57,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92063757] [2020-10-27 20:33:57,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:33:57,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:57,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:33:57,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:33:57,861 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2020-10-27 20:33:58,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:58,128 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-10-27 20:33:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:33:58,129 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 20:33:58,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:58,130 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:33:58,130 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 20:33:58,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:33:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 20:33:58,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-27 20:33:58,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 20:33:58,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-27 20:33:58,141 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2020-10-27 20:33:58,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:58,142 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-27 20:33:58,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:33:58,142 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-27 20:33:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:33:58,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:58,145 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:58,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:33:58,146 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:58,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:58,147 INFO L82 PathProgramCache]: Analyzing trace with hash -381853203, now seen corresponding path program 8 times [2020-10-27 20:33:58,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:58,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615208236] [2020-10-27 20:33:58,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:58,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:58,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:58,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:03,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:03,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:34:03,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:34:03,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 20:34:03,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:03,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:34:03,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:34:03,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:34:03,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:03,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:03,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:03,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:03,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:03,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:03,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:34:03,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:03,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:03,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:03,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:03,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:34:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:03,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615208236] [2020-10-27 20:34:03,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:03,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:34:03,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750388237] [2020-10-27 20:34:03,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:34:03,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:03,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:34:03,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:34:03,438 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 12 states. [2020-10-27 20:34:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:03,727 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-10-27 20:34:03,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:34:03,728 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 20:34:03,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:03,729 INFO L225 Difference]: With dead ends: 64 [2020-10-27 20:34:03,729 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 20:34:03,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:34:03,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 20:34:03,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-27 20:34:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 20:34:03,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-27 20:34:03,739 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2020-10-27 20:34:03,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:03,739 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-27 20:34:03,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:34:03,740 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-27 20:34:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 20:34:03,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:03,743 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:03,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:34:03,743 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:03,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:03,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1617089105, now seen corresponding path program 9 times [2020-10-27 20:34:03,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:03,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59789545] [2020-10-27 20:34:03,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:03,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:03,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:04,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:08,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:08,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:34:08,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:34:08,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-27 20:34:08,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:08,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:34:08,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:34:08,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:34:08,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:09,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:09,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:09,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:09,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:09,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:09,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:34:09,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:09,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:09,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:09,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:09,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:09,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59789545] [2020-10-27 20:34:09,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:09,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:34:09,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126269803] [2020-10-27 20:34:09,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:34:09,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:09,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:34:09,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:34:09,087 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 13 states. [2020-10-27 20:34:09,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:09,468 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2020-10-27 20:34:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:34:09,469 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-27 20:34:09,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:09,470 INFO L225 Difference]: With dead ends: 68 [2020-10-27 20:34:09,470 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 20:34:09,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:34:09,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 20:34:09,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-27 20:34:09,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:34:09,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-27 20:34:09,478 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2020-10-27 20:34:09,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:09,479 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-27 20:34:09,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:34:09,479 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-27 20:34:09,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:34:09,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:09,480 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:09,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:34:09,480 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:09,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:09,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1027150065, now seen corresponding path program 10 times [2020-10-27 20:34:09,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:09,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415737941] [2020-10-27 20:34:09,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:09,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:09,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:11,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:14,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:14,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 20:34:14,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:34:14,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5084 [2020-10-27 20:34:14,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:14,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:34:14,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:34:14,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:34:14,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:14,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:14,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:14,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:14,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:14,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:14,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:34:14,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:14,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:14,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:14,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:14,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:14,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415737941] [2020-10-27 20:34:14,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:14,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:34:14,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073167121] [2020-10-27 20:34:14,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:34:14,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:14,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:34:14,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:34:14,942 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 14 states. [2020-10-27 20:34:15,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:15,371 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-10-27 20:34:15,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:34:15,374 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-27 20:34:15,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:15,375 INFO L225 Difference]: With dead ends: 72 [2020-10-27 20:34:15,375 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 20:34:15,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:34:15,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 20:34:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-10-27 20:34:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 20:34:15,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-27 20:34:15,392 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2020-10-27 20:34:15,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:15,392 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-27 20:34:15,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:34:15,393 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-27 20:34:15,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:34:15,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:15,393 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:15,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:34:15,394 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:15,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:15,395 INFO L82 PathProgramCache]: Analyzing trace with hash -479646797, now seen corresponding path program 11 times [2020-10-27 20:34:15,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:15,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497521510] [2020-10-27 20:34:15,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:15,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:15,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:15,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:20,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:20,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:34:20,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:34:20,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-27 20:34:20,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:20,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:34:20,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:34:20,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:34:20,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:20,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:20,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:20,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:20,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:20,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:20,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:34:20,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:20,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:20,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:20,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:20,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:20,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497521510] [2020-10-27 20:34:20,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:20,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:34:20,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145138868] [2020-10-27 20:34:20,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:34:20,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:20,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:34:20,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:34:20,785 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 15 states. [2020-10-27 20:34:21,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:21,262 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2020-10-27 20:34:21,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:34:21,262 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-27 20:34:21,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:21,263 INFO L225 Difference]: With dead ends: 76 [2020-10-27 20:34:21,263 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:34:21,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:34:21,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:34:21,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-10-27 20:34:21,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 20:34:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-27 20:34:21,278 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2020-10-27 20:34:21,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:21,278 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-27 20:34:21,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:34:21,279 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-27 20:34:21,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 20:34:21,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:21,279 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:21,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:34:21,280 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:21,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1107452427, now seen corresponding path program 12 times [2020-10-27 20:34:21,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:21,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504068870] [2020-10-27 20:34:21,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:21,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:21,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:23,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:26,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:26,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 20:34:26,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:34:26,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 20:34:26,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:26,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:34:26,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:34:26,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:34:26,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:26,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:26,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:26,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:26,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:26,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:26,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:34:26,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:26,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:26,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:26,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:26,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:26,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504068870] [2020-10-27 20:34:26,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:26,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:34:26,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440076925] [2020-10-27 20:34:26,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:34:26,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:26,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:34:26,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:34:26,686 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2020-10-27 20:34:27,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:27,219 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2020-10-27 20:34:27,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:34:27,221 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-27 20:34:27,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:27,222 INFO L225 Difference]: With dead ends: 80 [2020-10-27 20:34:27,222 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 20:34:27,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:34:27,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 20:34:27,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-10-27 20:34:27,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:34:27,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-27 20:34:27,240 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2020-10-27 20:34:27,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:27,241 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-27 20:34:27,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:34:27,242 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-27 20:34:27,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:34:27,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:27,244 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:27,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:34:27,244 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:27,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:27,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1161725879, now seen corresponding path program 13 times [2020-10-27 20:34:27,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:27,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495688688] [2020-10-27 20:34:27,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:27,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:27,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:27,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:32,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:32,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 20:34:32,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:34:32,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5252 [2020-10-27 20:34:32,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:32,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:34:32,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:34:32,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 20:34:32,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:32,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:32,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:32,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:32,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:32,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:32,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:34:32,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:32,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:32,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:32,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:32,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:32,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495688688] [2020-10-27 20:34:32,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:32,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:34:32,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303528015] [2020-10-27 20:34:32,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:34:32,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:32,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:34:32,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:34:32,907 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 17 states. [2020-10-27 20:34:33,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:33,449 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2020-10-27 20:34:33,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:34:33,450 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-27 20:34:33,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:33,451 INFO L225 Difference]: With dead ends: 84 [2020-10-27 20:34:33,451 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 20:34:33,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:34:33,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 20:34:33,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-10-27 20:34:33,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 20:34:33,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-27 20:34:33,459 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2020-10-27 20:34:33,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:33,460 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-27 20:34:33,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:34:33,460 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-27 20:34:33,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 20:34:33,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:33,461 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:33,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:34:33,461 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:33,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:33,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1308423, now seen corresponding path program 14 times [2020-10-27 20:34:33,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:33,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228988274] [2020-10-27 20:34:33,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:33,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:33,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:33,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:38,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:38,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:34:38,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:34:38,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-27 20:34:38,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:38,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:34:38,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:34:38,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:34:38,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:38,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:38,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:38,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:38,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:38,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:38,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:34:38,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:38,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:38,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:38,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:38,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:38,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228988274] [2020-10-27 20:34:38,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:38,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:34:38,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818901241] [2020-10-27 20:34:38,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:34:38,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:38,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:34:38,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:34:38,971 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2020-10-27 20:34:39,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:39,569 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2020-10-27 20:34:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:34:39,570 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-27 20:34:39,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:39,570 INFO L225 Difference]: With dead ends: 88 [2020-10-27 20:34:39,570 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 20:34:39,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:34:39,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 20:34:39,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-27 20:34:39,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 20:34:39,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-27 20:34:39,579 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2020-10-27 20:34:39,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:39,579 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-27 20:34:39,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:34:39,579 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-27 20:34:39,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 20:34:39,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:39,580 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:39,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:34:39,580 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:39,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:39,580 INFO L82 PathProgramCache]: Analyzing trace with hash -985775685, now seen corresponding path program 15 times [2020-10-27 20:34:39,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:39,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016183756] [2020-10-27 20:34:39,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:39,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:39,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:42,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:44,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:44,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 20:34:44,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:34:44,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-27 20:34:44,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:44,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:34:44,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:34:44,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:34:44,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:45,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:45,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:45,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:45,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:45,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:45,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:34:45,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:45,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:45,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:45,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:45,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:45,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016183756] [2020-10-27 20:34:45,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:45,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:34:45,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651224296] [2020-10-27 20:34:45,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:34:45,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:45,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:34:45,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:34:45,160 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 19 states. [2020-10-27 20:34:45,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:45,858 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-10-27 20:34:45,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:34:45,859 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-27 20:34:45,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:45,860 INFO L225 Difference]: With dead ends: 92 [2020-10-27 20:34:45,860 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 20:34:45,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:34:45,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 20:34:45,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-10-27 20:34:45,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 20:34:45,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-27 20:34:45,868 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2020-10-27 20:34:45,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:45,869 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-27 20:34:45,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:34:45,869 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-27 20:34:45,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 20:34:45,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:45,870 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:45,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:34:45,870 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:45,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:45,871 INFO L82 PathProgramCache]: Analyzing trace with hash 2128957949, now seen corresponding path program 16 times [2020-10-27 20:34:45,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:45,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910818012] [2020-10-27 20:34:45,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:45,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:45,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:46,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:50,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:50,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 20:34:50,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:34:50,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 20:34:50,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:50,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:34:50,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:34:50,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 20:34:50,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:51,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:51,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:51,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:51,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:51,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:51,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:34:51,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:51,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:51,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:51,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:51,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:51,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910818012] [2020-10-27 20:34:51,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:51,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:34:51,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795158944] [2020-10-27 20:34:51,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:34:51,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:51,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:34:51,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:34:51,402 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 20 states. [2020-10-27 20:34:52,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:52,095 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2020-10-27 20:34:52,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:34:52,095 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-27 20:34:52,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:52,096 INFO L225 Difference]: With dead ends: 96 [2020-10-27 20:34:52,097 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 20:34:52,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:34:52,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 20:34:52,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-10-27 20:34:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 20:34:52,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-27 20:34:52,105 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2020-10-27 20:34:52,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:52,106 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-27 20:34:52,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:34:52,106 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-27 20:34:52,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 20:34:52,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:52,106 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:52,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:34:52,107 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:52,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:52,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1795774911, now seen corresponding path program 17 times [2020-10-27 20:34:52,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:52,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202527698] [2020-10-27 20:34:52,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:52,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:52,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:52,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:57,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:57,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 20:34:57,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:34:57,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5123 [2020-10-27 20:34:57,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:57,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:34:57,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:34:57,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:34:57,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:57,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:57,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:57,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:57,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:57,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:57,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:34:57,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:57,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:57,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:57,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:57,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:57,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202527698] [2020-10-27 20:34:57,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:57,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:34:57,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393269389] [2020-10-27 20:34:57,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:34:57,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:57,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:34:57,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:34:57,889 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 21 states. [2020-10-27 20:34:58,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:58,704 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2020-10-27 20:34:58,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:34:58,705 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-27 20:34:58,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:58,706 INFO L225 Difference]: With dead ends: 100 [2020-10-27 20:34:58,706 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 20:34:58,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:34:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 20:34:58,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-27 20:34:58,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 20:34:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-27 20:34:58,715 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2020-10-27 20:34:58,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:58,716 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-27 20:34:58,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:34:58,716 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-27 20:34:58,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 20:34:58,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:58,716 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:58,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:34:58,717 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:58,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:58,717 INFO L82 PathProgramCache]: Analyzing trace with hash -565544703, now seen corresponding path program 18 times [2020-10-27 20:34:58,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:58,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051036241] [2020-10-27 20:34:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:58,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:58,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:03,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:03,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 20:35:03,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:03,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5112 [2020-10-27 20:35:03,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:03,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:35:03,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:35:03,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 20:35:03,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:04,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:04,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:04,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:04,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:04,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:04,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:35:04,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:04,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:04,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:04,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:04,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:04,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051036241] [2020-10-27 20:35:04,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:04,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:35:04,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748256710] [2020-10-27 20:35:04,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:35:04,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:04,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:35:04,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:35:04,406 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 22 states. [2020-10-27 20:35:05,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:05,265 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2020-10-27 20:35:05,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:35:05,266 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-27 20:35:05,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:05,267 INFO L225 Difference]: With dead ends: 104 [2020-10-27 20:35:05,267 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 20:35:05,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:35:05,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 20:35:05,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-10-27 20:35:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 20:35:05,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-27 20:35:05,275 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2020-10-27 20:35:05,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:05,276 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-27 20:35:05,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:35:05,276 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-27 20:35:05,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 20:35:05,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:05,277 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:05,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:35:05,277 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:05,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:05,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2050961469, now seen corresponding path program 19 times [2020-10-27 20:35:05,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:05,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696763879] [2020-10-27 20:35:05,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:05,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:05,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:10,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:10,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 20:35:10,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:10,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5229 [2020-10-27 20:35:10,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:10,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:35:10,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:35:10,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 20:35:10,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:11,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:11,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:11,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:11,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:11,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:11,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:35:11,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:11,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:11,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:11,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:11,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:11,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696763879] [2020-10-27 20:35:11,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:11,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:35:11,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916881753] [2020-10-27 20:35:11,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:35:11,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:11,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:35:11,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:35:11,156 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 23 states. [2020-10-27 20:35:12,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:12,158 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2020-10-27 20:35:12,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:35:12,159 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-27 20:35:12,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:12,160 INFO L225 Difference]: With dead ends: 108 [2020-10-27 20:35:12,160 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 20:35:12,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:35:12,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 20:35:12,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-27 20:35:12,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 20:35:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-27 20:35:12,168 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2020-10-27 20:35:12,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:12,168 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-27 20:35:12,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:35:12,168 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-27 20:35:12,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 20:35:12,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:12,169 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:12,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:35:12,169 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:12,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:12,170 INFO L82 PathProgramCache]: Analyzing trace with hash 687635973, now seen corresponding path program 20 times [2020-10-27 20:35:12,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:12,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110334056] [2020-10-27 20:35:12,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:12,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:12,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:17,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:17,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 20:35:17,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:17,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5390 [2020-10-27 20:35:17,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:17,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:35:17,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:35:17,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 20:35:17,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:18,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:18,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:18,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:18,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:18,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:18,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:35:18,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:18,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:18,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:18,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:18,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:18,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110334056] [2020-10-27 20:35:18,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:18,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:35:18,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759596074] [2020-10-27 20:35:18,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:35:18,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:18,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:35:18,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:35:18,242 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 24 states. [2020-10-27 20:35:19,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:19,356 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2020-10-27 20:35:19,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:35:19,358 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-27 20:35:19,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:19,359 INFO L225 Difference]: With dead ends: 112 [2020-10-27 20:35:19,359 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 20:35:19,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:35:19,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 20:35:19,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-10-27 20:35:19,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 20:35:19,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-27 20:35:19,366 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2020-10-27 20:35:19,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:19,366 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-27 20:35:19,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:35:19,367 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-27 20:35:19,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 20:35:19,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:19,367 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:19,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:35:19,368 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:19,368 INFO L82 PathProgramCache]: Analyzing trace with hash -335174713, now seen corresponding path program 21 times [2020-10-27 20:35:19,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:19,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520212237] [2020-10-27 20:35:19,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:19,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:19,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:24,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:24,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 20:35:24,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:24,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-27 20:35:24,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:24,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:35:24,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:35:24,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 20:35:24,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:25,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:25,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:25,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:25,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:25,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:25,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:35:25,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:25,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:25,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:25,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:25,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:25,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520212237] [2020-10-27 20:35:25,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:25,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:35:25,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568271454] [2020-10-27 20:35:25,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:35:25,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:25,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:35:25,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:35:25,153 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 25 states. [2020-10-27 20:35:26,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:26,300 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2020-10-27 20:35:26,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:35:26,303 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-27 20:35:26,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:26,303 INFO L225 Difference]: With dead ends: 116 [2020-10-27 20:35:26,303 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 20:35:26,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:35:26,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 20:35:26,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-10-27 20:35:26,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 20:35:26,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-27 20:35:26,316 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 58 [2020-10-27 20:35:26,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:26,316 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-27 20:35:26,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:35:26,316 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-27 20:35:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 20:35:26,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:26,317 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:26,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:35:26,317 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:26,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:26,318 INFO L82 PathProgramCache]: Analyzing trace with hash 291266825, now seen corresponding path program 22 times [2020-10-27 20:35:26,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:26,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835329719] [2020-10-27 20:35:26,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:26,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:26,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:31,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:31,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 20:35:31,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:31,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5156 [2020-10-27 20:35:31,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:31,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:35:31,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:35:31,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 20:35:31,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:32,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:32,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:32,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:32,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:32,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:32,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:35:32,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:32,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:32,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:32,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:32,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:32,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835329719] [2020-10-27 20:35:32,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:32,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:35:32,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025032257] [2020-10-27 20:35:32,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:35:32,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:32,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:35:32,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:35:32,272 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 26 states. [2020-10-27 20:35:33,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:33,438 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2020-10-27 20:35:33,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:35:33,440 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-27 20:35:33,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:33,441 INFO L225 Difference]: With dead ends: 120 [2020-10-27 20:35:33,441 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 20:35:33,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:35:33,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 20:35:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-10-27 20:35:33,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 20:35:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-27 20:35:33,449 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2020-10-27 20:35:33,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:33,449 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-27 20:35:33,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:35:33,449 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-27 20:35:33,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 20:35:33,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:33,450 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:33,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:35:33,450 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:33,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:33,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1006163403, now seen corresponding path program 23 times [2020-10-27 20:35:33,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:33,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288598994] [2020-10-27 20:35:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:33,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:33,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:38,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:38,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 20:35:38,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:38,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5353 [2020-10-27 20:35:38,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:38,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:35:38,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:35:38,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 20:35:38,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:39,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:39,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:39,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:39,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:39,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:39,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:35:39,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:39,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:39,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:39,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:39,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:39,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288598994] [2020-10-27 20:35:39,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:39,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:35:39,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761770333] [2020-10-27 20:35:39,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:35:39,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:39,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:35:39,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:35:39,653 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 27 states. [2020-10-27 20:35:40,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:40,981 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2020-10-27 20:35:40,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:35:40,982 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-27 20:35:40,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:40,983 INFO L225 Difference]: With dead ends: 124 [2020-10-27 20:35:40,983 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 20:35:40,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:35:40,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 20:35:40,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-10-27 20:35:40,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 20:35:40,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-27 20:35:40,990 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2020-10-27 20:35:40,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:40,991 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-27 20:35:40,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:35:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-27 20:35:40,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 20:35:40,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:40,992 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:40,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:35:40,992 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:40,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:40,992 INFO L82 PathProgramCache]: Analyzing trace with hash 827007501, now seen corresponding path program 24 times [2020-10-27 20:35:40,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:40,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918352845] [2020-10-27 20:35:40,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:41,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:41,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:46,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:46,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 20:35:46,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:46,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5095 [2020-10-27 20:35:46,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:46,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:35:46,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:35:46,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 20:35:46,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:46,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:46,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:46,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:46,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:46,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:46,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:35:46,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:46,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:46,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918352845] [2020-10-27 20:35:46,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:46,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:35:46,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007330040] [2020-10-27 20:35:46,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:35:46,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:46,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:35:46,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:35:46,957 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 28 states. [2020-10-27 20:35:48,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:48,261 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2020-10-27 20:35:48,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:35:48,262 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-27 20:35:48,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:48,263 INFO L225 Difference]: With dead ends: 128 [2020-10-27 20:35:48,263 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 20:35:48,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:35:48,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 20:35:48,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-27 20:35:48,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 20:35:48,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-27 20:35:48,269 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2020-10-27 20:35:48,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:48,269 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-27 20:35:48,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:35:48,269 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-27 20:35:48,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 20:35:48,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:48,270 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:48,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:35:48,270 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:48,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:48,270 INFO L82 PathProgramCache]: Analyzing trace with hash 456877519, now seen corresponding path program 25 times [2020-10-27 20:35:48,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:48,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524003634] [2020-10-27 20:35:48,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:48,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:48,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:53,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:53,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 20:35:53,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:53,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5163 [2020-10-27 20:35:53,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:53,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:35:53,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:35:53,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 20:35:53,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:54,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:54,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:54,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:54,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:54,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:54,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 20:35:54,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:54,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:54,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:54,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:54,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:54,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524003634] [2020-10-27 20:35:54,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:54,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:35:54,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584495853] [2020-10-27 20:35:54,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:35:54,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:54,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:35:54,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:35:54,428 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 29 states. [2020-10-27 20:35:55,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:55,926 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2020-10-27 20:35:55,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:35:55,927 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-27 20:35:55,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:55,928 INFO L225 Difference]: With dead ends: 132 [2020-10-27 20:35:55,928 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 20:35:55,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:35:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 20:35:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-10-27 20:35:55,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 20:35:55,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-27 20:35:55,936 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2020-10-27 20:35:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:55,936 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-27 20:35:55,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:35:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-27 20:35:55,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 20:35:55,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:55,937 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:55,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:35:55,937 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:55,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:55,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1244250385, now seen corresponding path program 26 times [2020-10-27 20:35:55,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:55,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39878443] [2020-10-27 20:35:55,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:56,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:56,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:00,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:00,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 20:36:00,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:36:00,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 20:36:00,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:00,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:36:00,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:36:00,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 20:36:00,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:01,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:01,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:01,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:01,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:01,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:01,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:36:01,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:01,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:01,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:01,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:01,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:01,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39878443] [2020-10-27 20:36:01,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:01,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:36:01,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825683213] [2020-10-27 20:36:01,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:36:01,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:01,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:36:01,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:36:01,925 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 30 states. [2020-10-27 20:36:03,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:03,567 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2020-10-27 20:36:03,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:36:03,570 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-10-27 20:36:03,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:03,571 INFO L225 Difference]: With dead ends: 136 [2020-10-27 20:36:03,571 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 20:36:03,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:36:03,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 20:36:03,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2020-10-27 20:36:03,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 20:36:03,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-27 20:36:03,578 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2020-10-27 20:36:03,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:03,579 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-27 20:36:03,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:36:03,579 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-27 20:36:03,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 20:36:03,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:03,579 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:03,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:36:03,580 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:03,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:03,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1995330515, now seen corresponding path program 27 times [2020-10-27 20:36:03,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:03,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576338480] [2020-10-27 20:36:03,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:03,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:03,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:09,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:09,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 20:36:09,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:36:09,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5682 [2020-10-27 20:36:09,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:09,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:36:09,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:36:09,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 20:36:09,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:10,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:10,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:10,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:10,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:10,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:10,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:36:10,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:10,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:10,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:10,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:10,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:10,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576338480] [2020-10-27 20:36:10,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:10,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:36:10,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733543149] [2020-10-27 20:36:10,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:36:10,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:10,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:36:10,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:36:10,307 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 31 states. [2020-10-27 20:36:12,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:12,044 INFO L93 Difference]: Finished difference Result 140 states and 145 transitions. [2020-10-27 20:36:12,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:36:12,048 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-27 20:36:12,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:12,049 INFO L225 Difference]: With dead ends: 140 [2020-10-27 20:36:12,049 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 20:36:12,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:36:12,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 20:36:12,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-10-27 20:36:12,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 20:36:12,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-27 20:36:12,057 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2020-10-27 20:36:12,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:12,058 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-27 20:36:12,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:36:12,058 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-27 20:36:12,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 20:36:12,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:12,059 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:12,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:36:12,060 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:12,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:12,061 INFO L82 PathProgramCache]: Analyzing trace with hash -2066137579, now seen corresponding path program 28 times [2020-10-27 20:36:12,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:12,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617928481] [2020-10-27 20:36:12,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:12,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:13,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:17,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:17,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 20:36:17,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:36:17,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5131 [2020-10-27 20:36:17,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:36:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:36:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 20:36:17,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:18,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:18,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:18,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:18,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:18,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:18,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:36:18,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:18,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:18,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:18,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:18,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 2 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:18,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617928481] [2020-10-27 20:36:18,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:18,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:36:18,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110308086] [2020-10-27 20:36:18,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:36:18,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:18,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:36:18,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:36:18,345 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 32 states. [2020-10-27 20:36:20,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:20,271 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2020-10-27 20:36:20,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:36:20,271 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-10-27 20:36:20,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:20,273 INFO L225 Difference]: With dead ends: 144 [2020-10-27 20:36:20,273 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 20:36:20,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:36:20,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 20:36:20,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-10-27 20:36:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 20:36:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-27 20:36:20,280 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2020-10-27 20:36:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:20,280 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-27 20:36:20,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:36:20,281 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-27 20:36:20,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 20:36:20,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:20,281 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:20,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:36:20,282 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:20,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:20,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1011703849, now seen corresponding path program 29 times [2020-10-27 20:36:20,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:20,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82740628] [2020-10-27 20:36:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:20,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:26,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:26,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 20:36:26,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:26,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5726 [2020-10-27 20:36:26,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:26,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:36:26,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:36:26,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 20:36:26,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:27,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:27,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:27,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:27,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:27,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:27,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:36:27,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:27,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:27,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:27,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:27,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:27,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82740628] [2020-10-27 20:36:27,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:27,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:36:27,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603106506] [2020-10-27 20:36:27,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:36:27,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:27,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:36:27,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:36:27,168 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 33 states. [2020-10-27 20:36:29,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:29,214 INFO L93 Difference]: Finished difference Result 148 states and 153 transitions. [2020-10-27 20:36:29,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 20:36:29,222 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-27 20:36:29,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:29,223 INFO L225 Difference]: With dead ends: 148 [2020-10-27 20:36:29,223 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 20:36:29,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:36:29,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 20:36:29,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-10-27 20:36:29,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 20:36:29,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-27 20:36:29,231 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2020-10-27 20:36:29,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:29,232 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-27 20:36:29,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 20:36:29,232 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-27 20:36:29,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 20:36:29,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:29,233 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:29,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:36:29,233 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:29,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:29,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1313171175, now seen corresponding path program 30 times [2020-10-27 20:36:29,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:29,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194890614] [2020-10-27 20:36:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:29,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:34,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:34,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 20:36:34,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:34,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5222 [2020-10-27 20:36:34,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:34,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:36:34,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:36:34,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 20:36:34,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:35,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:35,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:35,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:35,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:35,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:35,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:36:35,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:35,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:35,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:35,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:35,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:35,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194890614] [2020-10-27 20:36:35,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:35,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 20:36:35,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797222441] [2020-10-27 20:36:35,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 20:36:35,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:35,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 20:36:35,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:36:35,743 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 34 states. [2020-10-27 20:36:37,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:37,996 INFO L93 Difference]: Finished difference Result 152 states and 157 transitions. [2020-10-27 20:36:38,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:36:38,001 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-10-27 20:36:38,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:38,002 INFO L225 Difference]: With dead ends: 152 [2020-10-27 20:36:38,002 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 20:36:38,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:36:38,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 20:36:38,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-10-27 20:36:38,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 20:36:38,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-27 20:36:38,014 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2020-10-27 20:36:38,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:38,014 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-27 20:36:38,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 20:36:38,015 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-27 20:36:38,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 20:36:38,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:38,015 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:38,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:36:38,016 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:38,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:38,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1034504667, now seen corresponding path program 31 times [2020-10-27 20:36:38,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:38,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444642619] [2020-10-27 20:36:38,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:38,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:40,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:43,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:43,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 20:36:43,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:36:43,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5586 [2020-10-27 20:36:43,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:43,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:36:43,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:36:43,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 20:36:43,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:44,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:44,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:44,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:44,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:44,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:44,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:36:44,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:44,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:44,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:44,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:44,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:44,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444642619] [2020-10-27 20:36:44,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:44,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 20:36:44,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487688497] [2020-10-27 20:36:44,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 20:36:44,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:44,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 20:36:44,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:36:44,930 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 35 states. [2020-10-27 20:36:47,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:47,317 INFO L93 Difference]: Finished difference Result 156 states and 161 transitions. [2020-10-27 20:36:47,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 20:36:47,318 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-27 20:36:47,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:47,319 INFO L225 Difference]: With dead ends: 156 [2020-10-27 20:36:47,319 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 20:36:47,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:36:47,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 20:36:47,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-10-27 20:36:47,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 20:36:47,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-27 20:36:47,326 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2020-10-27 20:36:47,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:47,327 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-27 20:36:47,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 20:36:47,327 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-27 20:36:47,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 20:36:47,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:47,327 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:47,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:36:47,327 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:47,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:47,328 INFO L82 PathProgramCache]: Analyzing trace with hash -2001808867, now seen corresponding path program 32 times [2020-10-27 20:36:47,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:47,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996129744] [2020-10-27 20:36:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:47,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:52,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:52,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 20:36:52,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:52,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5260 [2020-10-27 20:36:52,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:52,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 20:36:52,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:36:52,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 20:36:52,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:54,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:54,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:54,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:54,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:54,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:54,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:36:54,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:54,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:54,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:54,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:54,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 2 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:54,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996129744] [2020-10-27 20:36:54,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:54,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 20:36:54,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140738892] [2020-10-27 20:36:54,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 20:36:54,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:54,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 20:36:54,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:36:54,049 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 36 states. [2020-10-27 20:36:56,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:56,461 INFO L93 Difference]: Finished difference Result 160 states and 165 transitions. [2020-10-27 20:36:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 20:36:56,462 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 80 [2020-10-27 20:36:56,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:56,463 INFO L225 Difference]: With dead ends: 160 [2020-10-27 20:36:56,463 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 20:36:56,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:36:56,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 20:36:56,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-10-27 20:36:56,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 20:36:56,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-27 20:36:56,471 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2020-10-27 20:36:56,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:56,472 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-27 20:36:56,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 20:36:56,472 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-27 20:36:56,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 20:36:56,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:56,473 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:56,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:36:56,473 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:56,474 INFO L82 PathProgramCache]: Analyzing trace with hash 678646239, now seen corresponding path program 33 times [2020-10-27 20:36:56,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:56,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152630925] [2020-10-27 20:36:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:56,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:03,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:03,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 20:37:03,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:03,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7430 [2020-10-27 20:37:03,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:03,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 20:37:03,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:37:03,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 20:37:03,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:05,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:05,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:05,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:05,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:05,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:05,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:37:05,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:05,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:05,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:05,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:05,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 2 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:37:05,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152630925] [2020-10-27 20:37:05,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:37:05,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 20:37:05,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563545442] [2020-10-27 20:37:05,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 20:37:05,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:05,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 20:37:05,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:37:05,404 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 37 states. [2020-10-27 20:37:08,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:08,132 INFO L93 Difference]: Finished difference Result 164 states and 169 transitions. [2020-10-27 20:37:08,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 20:37:08,133 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 82 [2020-10-27 20:37:08,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:08,134 INFO L225 Difference]: With dead ends: 164 [2020-10-27 20:37:08,134 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 20:37:08,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:37:08,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 20:37:08,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2020-10-27 20:37:08,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 20:37:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-27 20:37:08,143 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 82 [2020-10-27 20:37:08,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:08,143 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-27 20:37:08,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 20:37:08,144 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-27 20:37:08,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 20:37:08,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:08,145 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:08,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:37:08,145 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:08,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:08,145 INFO L82 PathProgramCache]: Analyzing trace with hash -384374495, now seen corresponding path program 34 times [2020-10-27 20:37:08,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:08,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433723196] [2020-10-27 20:37:08,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:08,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking...