/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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-crafted-1/in-de51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:48:04,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:48:04,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:48:04,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:48:04,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:48:04,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:48:04,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:48:04,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:48:04,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:48:04,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:48:04,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:48:04,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:48:04,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:48:04,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:48:04,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:48:04,151 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:48:04,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:48:04,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:48:04,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:48:04,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:48:04,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:48:04,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:48:04,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:48:04,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:48:04,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:48:04,201 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:48:04,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:48:04,204 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:48:04,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:48:04,206 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:48:04,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:48:04,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:48:04,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:48:04,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:48:04,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:48:04,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:48:04,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:48:04,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:48:04,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:48:04,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:48:04,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:48:04,220 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 [2020-10-29 09:48:04,269 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:48:04,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:48:04,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:48:04,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:48:04,274 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:48:04,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:48:04,274 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:48:04,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:48:04,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:48:04,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:48:04,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:48:04,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:48:04,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:48:04,277 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:48:04,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:48:04,277 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:48:04,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:48:04,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:48:04,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:48:04,278 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:48:04,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:48:04,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:48:04,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:48:04,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:48:04,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:48:04,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:48:04,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:48:04,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:48:04,280 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:48:04,280 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:48:04,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:48:04,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:48:04,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:48:04,780 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:48:04,781 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:48:04,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de51.c [2020-10-29 09:48:04,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db223aed0/fae21408544044a9a945eb113ddbff1a/FLAG3badc7358 [2020-10-29 09:48:05,509 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:48:05,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de51.c [2020-10-29 09:48:05,519 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db223aed0/fae21408544044a9a945eb113ddbff1a/FLAG3badc7358 [2020-10-29 09:48:05,891 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db223aed0/fae21408544044a9a945eb113ddbff1a [2020-10-29 09:48:05,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:48:05,905 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:48:05,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:48:05,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:48:05,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:48:05,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:48:05" (1/1) ... [2020-10-29 09:48:05,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b9b91bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:05, skipping insertion in model container [2020-10-29 09:48:05,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:48:05" (1/1) ... [2020-10-29 09:48:05,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:48:05,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:48:06,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:48:06,235 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:48:06,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:48:06,287 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:48:06,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:06 WrapperNode [2020-10-29 09:48:06,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:48:06,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:48:06,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:48:06,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:48:06,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:06" (1/1) ... [2020-10-29 09:48:06,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:06" (1/1) ... [2020-10-29 09:48:06,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:06" (1/1) ... [2020-10-29 09:48:06,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:06" (1/1) ... [2020-10-29 09:48:06,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:06" (1/1) ... [2020-10-29 09:48:06,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:06" (1/1) ... [2020-10-29 09:48:06,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:06" (1/1) ... [2020-10-29 09:48:06,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:48:06,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:48:06,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:48:06,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:48:06,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:06" (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 [2020-10-29 09:48:06,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:48:06,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:48:06,447 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:48:06,447 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:48:06,447 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:48:06,448 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:48:06,448 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:48:06,448 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:48:06,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:48:06,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-29 09:48:06,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:48:06,449 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:48:06,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:48:06,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:48:06,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:48:06,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:48:06,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:48:06,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:48:06,757 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:48:06,758 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-29 09:48:06,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:48:06 BoogieIcfgContainer [2020-10-29 09:48:06,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:48:06,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:48:06,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:48:06,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:48:06,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:48:05" (1/3) ... [2020-10-29 09:48:06,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ce0031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:48:06, skipping insertion in model container [2020-10-29 09:48:06,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:06" (2/3) ... [2020-10-29 09:48:06,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ce0031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:48:06, skipping insertion in model container [2020-10-29 09:48:06,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:48:06" (3/3) ... [2020-10-29 09:48:06,771 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de51.c [2020-10-29 09:48:06,786 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:48:06,792 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:48:06,809 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:48:06,842 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:48:06,843 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:48:06,843 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:48:06,843 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:48:06,843 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:48:06,843 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:48:06,844 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:48:06,844 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:48:06,863 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-29 09:48:06,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:48:06,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:06,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:06,871 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:06,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:06,878 INFO L82 PathProgramCache]: Analyzing trace with hash 2036788406, now seen corresponding path program 1 times [2020-10-29 09:48:06,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:06,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677202130] [2020-10-29 09:48:06,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:07,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:07,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:07,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:07,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:48:07,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:48:07,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 525 [2020-10-29 09:48:07,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:07,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:07,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:48:07,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:07,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:48:07,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:48:07,939 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 16 [2020-10-29 09:48:08,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:08,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:08,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:08,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:08,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:08,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 09:48:08,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:08,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:08,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:08,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:08,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:08,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:08,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677202130] [2020-10-29 09:48:08,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:48:08,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:48:08,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369911681] [2020-10-29 09:48:08,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:48:08,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:08,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:48:08,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:48:08,144 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 6 states. [2020-10-29 09:48:08,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:08,622 INFO L93 Difference]: Finished difference Result 60 states and 92 transitions. [2020-10-29 09:48:08,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:48:08,624 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-29 09:48:08,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:08,632 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:48:08,632 INFO L226 Difference]: Without dead ends: 24 [2020-10-29 09:48:08,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:48:08,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-29 09:48:08,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-29 09:48:08,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 09:48:08,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2020-10-29 09:48:08,681 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 17 [2020-10-29 09:48:08,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:08,682 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2020-10-29 09:48:08,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:48:08,682 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2020-10-29 09:48:08,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:48:08,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:08,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:08,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:48:08,684 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:08,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:08,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1403961586, now seen corresponding path program 1 times [2020-10-29 09:48:08,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:08,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073537629] [2020-10-29 09:48:08,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:08,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:08,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:08,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:09,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:09,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:48:09,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:09,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-29 09:48:09,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:09,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:09,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:48:09,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:48:09,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:48:09,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:09,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:09,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:09,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:09,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:09,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:09,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:48:09,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:09,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:09,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:09,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:09,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:09,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:09,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073537629] [2020-10-29 09:48:09,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:48:09,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:48:09,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636082563] [2020-10-29 09:48:09,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:48:09,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:09,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:48:09,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:48:09,142 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 5 states. [2020-10-29 09:48:09,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:09,321 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2020-10-29 09:48:09,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:48:09,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-29 09:48:09,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:09,324 INFO L225 Difference]: With dead ends: 40 [2020-10-29 09:48:09,325 INFO L226 Difference]: Without dead ends: 32 [2020-10-29 09:48:09,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:48:09,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-29 09:48:09,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-29 09:48:09,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 09:48:09,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-29 09:48:09,351 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2020-10-29 09:48:09,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:09,351 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-29 09:48:09,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:48:09,352 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-29 09:48:09,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:48:09,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:09,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:09,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:48:09,353 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:09,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:09,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1941968995, now seen corresponding path program 1 times [2020-10-29 09:48:09,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:09,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137369564] [2020-10-29 09:48:09,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:09,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:09,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:09,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:09,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:48:09,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:48:09,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-29 09:48:09,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:09,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:09,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:48:09,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:09,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:48:09,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:09,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:09,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:09,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:09,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:09,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:09,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:48:09,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:09,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:09,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:09,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:09,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:09,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:48:09,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137369564] [2020-10-29 09:48:09,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:48:09,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 09:48:09,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279851936] [2020-10-29 09:48:09,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:48:09,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:09,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:48:09,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:48:09,773 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 8 states. [2020-10-29 09:48:10,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:10,394 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2020-10-29 09:48:10,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:48:10,395 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-29 09:48:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:10,396 INFO L225 Difference]: With dead ends: 61 [2020-10-29 09:48:10,396 INFO L226 Difference]: Without dead ends: 42 [2020-10-29 09:48:10,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:48:10,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-29 09:48:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2020-10-29 09:48:10,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:48:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2020-10-29 09:48:10,407 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 18 [2020-10-29 09:48:10,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:10,407 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2020-10-29 09:48:10,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:48:10,407 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2020-10-29 09:48:10,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:48:10,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:10,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:10,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:48:10,409 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:10,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:10,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1302000028, now seen corresponding path program 1 times [2020-10-29 09:48:10,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:10,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379330006] [2020-10-29 09:48:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:10,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:10,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:10,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:10,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:10,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:48:10,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:10,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-29 09:48:10,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:10,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:10,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:48:10,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:10,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:48:10,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:10,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:10,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:10,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:10,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:10,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:10,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:48:10,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:10,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:10,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:10,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:10,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:10,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:10,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379330006] [2020-10-29 09:48:10,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:10,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:48:10,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767492179] [2020-10-29 09:48:10,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:48:10,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:10,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:48:10,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:48:10,660 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand 5 states. [2020-10-29 09:48:10,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:10,829 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2020-10-29 09:48:10,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:48:10,830 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-29 09:48:10,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:10,831 INFO L225 Difference]: With dead ends: 45 [2020-10-29 09:48:10,831 INFO L226 Difference]: Without dead ends: 26 [2020-10-29 09:48:10,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:48:10,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-29 09:48:10,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-29 09:48:10,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-29 09:48:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-10-29 09:48:10,840 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 18 [2020-10-29 09:48:10,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:10,840 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-10-29 09:48:10,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:48:10,841 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-10-29 09:48:10,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:48:10,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:10,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:10,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:48:10,842 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:10,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:10,842 INFO L82 PathProgramCache]: Analyzing trace with hash -601590112, now seen corresponding path program 1 times [2020-10-29 09:48:10,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:10,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753689872] [2020-10-29 09:48:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:10,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:10,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:10,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:10,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:10,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:11,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:11,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:48:11,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:48:11,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-29 09:48:11,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:11,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:11,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:48:11,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:11,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:48:11,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 09:48:11,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:11,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:11,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:11,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:11,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:11,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:48:11,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:11,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:11,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:11,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:11,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:11,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:11,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753689872] [2020-10-29 09:48:11,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:11,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:48:11,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294706006] [2020-10-29 09:48:11,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:48:11,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:11,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:48:11,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:48:11,396 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 7 states. [2020-10-29 09:48:11,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:11,686 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2020-10-29 09:48:11,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:48:11,686 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-29 09:48:11,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:11,687 INFO L225 Difference]: With dead ends: 44 [2020-10-29 09:48:11,687 INFO L226 Difference]: Without dead ends: 34 [2020-10-29 09:48:11,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:48:11,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-29 09:48:11,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-10-29 09:48:11,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:48:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-29 09:48:11,717 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 19 [2020-10-29 09:48:11,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:11,718 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-29 09:48:11,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:48:11,718 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-29 09:48:11,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:48:11,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:11,720 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:11,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:48:11,721 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:11,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:11,722 INFO L82 PathProgramCache]: Analyzing trace with hash 951047666, now seen corresponding path program 2 times [2020-10-29 09:48:11,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:11,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552555315] [2020-10-29 09:48:11,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:11,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:11,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:11,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:12,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:12,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:48:12,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:12,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 363 [2020-10-29 09:48:12,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:12,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:12,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:48:12,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:12,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:48:12,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:12,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:12,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:12,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:12,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:12,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:12,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:48:12,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:12,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:12,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:12,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:12,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:12,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:48:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:12,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552555315] [2020-10-29 09:48:12,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:12,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:48:12,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000010609] [2020-10-29 09:48:12,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:48:12,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:12,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:48:12,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:48:12,223 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 6 states. [2020-10-29 09:48:12,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:12,552 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2020-10-29 09:48:12,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:48:12,553 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-29 09:48:12,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:12,555 INFO L225 Difference]: With dead ends: 49 [2020-10-29 09:48:12,555 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 09:48:12,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:48:12,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 09:48:12,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2020-10-29 09:48:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:48:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-10-29 09:48:12,565 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 19 [2020-10-29 09:48:12,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:12,565 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-10-29 09:48:12,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:48:12,565 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-10-29 09:48:12,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:48:12,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:12,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:12,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:48:12,567 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:12,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:12,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1402946349, now seen corresponding path program 1 times [2020-10-29 09:48:12,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:12,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769454546] [2020-10-29 09:48:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:12,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:12,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:12,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:12,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:12,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:12,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:12,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:48:12,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:48:12,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 399 [2020-10-29 09:48:12,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:12,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:12,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:48:12,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:12,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:48:12,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:13,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:13,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:13,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:13,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:13,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:13,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:48:13,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:13,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:13,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:13,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:13,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:13,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:48:13,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769454546] [2020-10-29 09:48:13,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:13,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:48:13,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550385122] [2020-10-29 09:48:13,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:48:13,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:13,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:48:13,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:48:13,185 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 8 states. [2020-10-29 09:48:13,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:13,545 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2020-10-29 09:48:13,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:48:13,546 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-29 09:48:13,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:13,547 INFO L225 Difference]: With dead ends: 46 [2020-10-29 09:48:13,548 INFO L226 Difference]: Without dead ends: 40 [2020-10-29 09:48:13,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:48:13,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-29 09:48:13,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-29 09:48:13,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 09:48:13,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-10-29 09:48:13,558 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 20 [2020-10-29 09:48:13,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:13,559 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-10-29 09:48:13,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:48:13,559 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-10-29 09:48:13,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:48:13,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:13,560 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:13,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:48:13,560 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:13,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:13,561 INFO L82 PathProgramCache]: Analyzing trace with hash 523411666, now seen corresponding path program 2 times [2020-10-29 09:48:13,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:13,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414497274] [2020-10-29 09:48:13,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:13,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:13,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:13,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:13,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:13,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:14,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:14,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:14,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:48:14,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:48:14,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 724 [2020-10-29 09:48:14,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:14,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:14,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:48:14,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:14,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:48:14,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:14,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:14,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:14,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:14,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:14,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:14,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:14,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:14,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:14,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:14,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:14,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:14,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:14,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414497274] [2020-10-29 09:48:14,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:14,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:48:14,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040389306] [2020-10-29 09:48:14,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:48:14,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:14,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:48:14,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:48:14,417 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 7 states. [2020-10-29 09:48:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:14,758 INFO L93 Difference]: Finished difference Result 69 states and 99 transitions. [2020-10-29 09:48:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:48:14,758 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-29 09:48:14,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:14,759 INFO L225 Difference]: With dead ends: 69 [2020-10-29 09:48:14,759 INFO L226 Difference]: Without dead ends: 58 [2020-10-29 09:48:14,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:48:14,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-29 09:48:14,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2020-10-29 09:48:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 09:48:14,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 59 transitions. [2020-10-29 09:48:14,772 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 59 transitions. Word has length 20 [2020-10-29 09:48:14,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:14,772 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 59 transitions. [2020-10-29 09:48:14,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:48:14,772 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 59 transitions. [2020-10-29 09:48:14,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:48:14,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:14,773 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:14,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:48:14,774 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:14,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:14,774 INFO L82 PathProgramCache]: Analyzing trace with hash 527673329, now seen corresponding path program 1 times [2020-10-29 09:48:14,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:14,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231441253] [2020-10-29 09:48:14,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:14,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:14,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:14,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:15,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:15,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:48:15,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:15,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-29 09:48:15,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:15,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:15,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:48:15,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:15,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:48:15,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:15,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:15,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:15,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:15,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:15,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:15,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:48:15,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:15,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:15,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:15,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:15,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:15,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:48:15,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231441253] [2020-10-29 09:48:15,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:15,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:48:15,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900163072] [2020-10-29 09:48:15,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:48:15,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:15,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:48:15,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:48:15,360 INFO L87 Difference]: Start difference. First operand 43 states and 59 transitions. Second operand 10 states. [2020-10-29 09:48:16,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:16,053 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2020-10-29 09:48:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:48:16,054 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-29 09:48:16,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:16,055 INFO L225 Difference]: With dead ends: 64 [2020-10-29 09:48:16,055 INFO L226 Difference]: Without dead ends: 52 [2020-10-29 09:48:16,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:48:16,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-29 09:48:16,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-10-29 09:48:16,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 09:48:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2020-10-29 09:48:16,071 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 21 [2020-10-29 09:48:16,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:16,071 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2020-10-29 09:48:16,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:48:16,072 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2020-10-29 09:48:16,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:48:16,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:16,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:16,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:48:16,076 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:16,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:16,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1065680738, now seen corresponding path program 1 times [2020-10-29 09:48:16,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:16,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303828197] [2020-10-29 09:48:16,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:16,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:16,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:16,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:16,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:48:16,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:48:16,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-29 09:48:16,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:16,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:16,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:48:16,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:48:16,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:48:16,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:16,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:16,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:16,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:16,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:16,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:16,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:48:16,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:16,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:16,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:16,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:16,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:16,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:48:16,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303828197] [2020-10-29 09:48:16,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:16,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:48:16,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143848008] [2020-10-29 09:48:16,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:48:16,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:16,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:48:16,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:48:16,269 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand 5 states. [2020-10-29 09:48:16,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:16,455 INFO L93 Difference]: Finished difference Result 59 states and 80 transitions. [2020-10-29 09:48:16,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:48:16,456 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-29 09:48:16,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:16,458 INFO L225 Difference]: With dead ends: 59 [2020-10-29 09:48:16,458 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 09:48:16,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:48:16,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 09:48:16,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-10-29 09:48:16,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:48:16,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2020-10-29 09:48:16,481 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 21 [2020-10-29 09:48:16,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:16,482 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2020-10-29 09:48:16,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:48:16,482 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2020-10-29 09:48:16,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:48:16,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:16,486 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:16,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:48:16,486 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:16,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:16,488 INFO L82 PathProgramCache]: Analyzing trace with hash 151597554, now seen corresponding path program 3 times [2020-10-29 09:48:16,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:16,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236710005] [2020-10-29 09:48:16,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:16,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:16,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:16,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:16,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:16,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:17,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:17,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:48:17,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:48:17,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-29 09:48:17,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:17,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:17,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:48:17,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:17,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:48:17,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:17,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:17,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:17,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:17,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:17,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:17,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 09:48:17,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:17,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:17,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:17,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:17,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:17,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:17,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236710005] [2020-10-29 09:48:17,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:17,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:48:17,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059475380] [2020-10-29 09:48:17,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:48:17,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:17,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:48:17,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:48:17,171 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 9 states. [2020-10-29 09:48:17,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:17,564 INFO L93 Difference]: Finished difference Result 78 states and 105 transitions. [2020-10-29 09:48:17,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:48:17,565 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-29 09:48:17,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:17,566 INFO L225 Difference]: With dead ends: 78 [2020-10-29 09:48:17,566 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 09:48:17,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:48:17,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 09:48:17,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2020-10-29 09:48:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:48:17,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2020-10-29 09:48:17,584 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 21 [2020-10-29 09:48:17,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:17,585 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2020-10-29 09:48:17,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:48:17,585 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2020-10-29 09:48:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:48:17,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:17,588 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:17,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:48:17,589 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:17,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:17,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1703601102, now seen corresponding path program 3 times [2020-10-29 09:48:17,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:17,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771087930] [2020-10-29 09:48:17,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:17,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:17,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:17,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:17,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:17,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:48:17,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:17,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-29 09:48:17,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:17,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:17,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:48:17,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:17,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:48:17,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:18,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:18,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:18,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:18,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:18,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:18,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:48:18,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:18,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:18,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:18,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:18,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:18,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:18,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771087930] [2020-10-29 09:48:18,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:18,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:48:18,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120858431] [2020-10-29 09:48:18,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:48:18,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:18,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:48:18,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:48:18,077 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand 8 states. [2020-10-29 09:48:18,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:18,569 INFO L93 Difference]: Finished difference Result 99 states and 140 transitions. [2020-10-29 09:48:18,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:48:18,571 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-29 09:48:18,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:18,572 INFO L225 Difference]: With dead ends: 99 [2020-10-29 09:48:18,572 INFO L226 Difference]: Without dead ends: 86 [2020-10-29 09:48:18,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:48:18,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-29 09:48:18,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 53. [2020-10-29 09:48:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 09:48:18,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 71 transitions. [2020-10-29 09:48:18,590 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 71 transitions. Word has length 21 [2020-10-29 09:48:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:18,591 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 71 transitions. [2020-10-29 09:48:18,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:48:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 71 transitions. [2020-10-29 09:48:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:48:18,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:18,595 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:18,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:48:18,595 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:18,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:18,596 INFO L82 PathProgramCache]: Analyzing trace with hash -641008701, now seen corresponding path program 2 times [2020-10-29 09:48:18,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:18,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895640395] [2020-10-29 09:48:18,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:18,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:18,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:18,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:18,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:18,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:19,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:19,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:20,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:20,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:48:20,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:48:20,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1443 [2020-10-29 09:48:20,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:20,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:20,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:48:20,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:48:20,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:48:20,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:20,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:20,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:20,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:20,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:20,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:20,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:48:20,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:20,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:20,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:20,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:20,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:20,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 09:48:20,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895640395] [2020-10-29 09:48:20,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:20,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:48:20,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070234497] [2020-10-29 09:48:20,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:48:20,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:20,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:48:20,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:48:20,155 INFO L87 Difference]: Start difference. First operand 53 states and 71 transitions. Second operand 5 states. [2020-10-29 09:48:20,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:20,364 INFO L93 Difference]: Finished difference Result 97 states and 137 transitions. [2020-10-29 09:48:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:48:20,365 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-29 09:48:20,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:20,366 INFO L225 Difference]: With dead ends: 97 [2020-10-29 09:48:20,366 INFO L226 Difference]: Without dead ends: 88 [2020-10-29 09:48:20,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:48:20,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-29 09:48:20,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2020-10-29 09:48:20,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 09:48:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 99 transitions. [2020-10-29 09:48:20,381 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 99 transitions. Word has length 22 [2020-10-29 09:48:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:20,381 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 99 transitions. [2020-10-29 09:48:20,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:48:20,381 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 99 transitions. [2020-10-29 09:48:20,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:48:20,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:20,385 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:20,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:48:20,385 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:20,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:20,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1386316260, now seen corresponding path program 4 times [2020-10-29 09:48:20,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:20,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960742025] [2020-10-29 09:48:20,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:20,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:20,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:20,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:21,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:21,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:48:21,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:21,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-10-29 09:48:21,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:21,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:21,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:48:21,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:21,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:48:21,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:21,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:21,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:21,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:21,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:21,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:21,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:21,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:21,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:21,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:21,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:21,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:21,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:21,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960742025] [2020-10-29 09:48:21,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:21,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:48:21,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956405854] [2020-10-29 09:48:21,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:48:21,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:21,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:48:21,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:48:21,203 INFO L87 Difference]: Start difference. First operand 71 states and 99 transitions. Second operand 9 states. [2020-10-29 09:48:21,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:21,844 INFO L93 Difference]: Finished difference Result 140 states and 205 transitions. [2020-10-29 09:48:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:48:21,845 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-29 09:48:21,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:21,846 INFO L225 Difference]: With dead ends: 140 [2020-10-29 09:48:21,846 INFO L226 Difference]: Without dead ends: 123 [2020-10-29 09:48:21,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:48:21,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-29 09:48:21,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 78. [2020-10-29 09:48:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-29 09:48:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 110 transitions. [2020-10-29 09:48:21,860 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 110 transitions. Word has length 22 [2020-10-29 09:48:21,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:21,861 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 110 transitions. [2020-10-29 09:48:21,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:48:21,861 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 110 transitions. [2020-10-29 09:48:21,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:48:21,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:21,861 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:21,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:48:21,862 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:21,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:21,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1776024418, now seen corresponding path program 1 times [2020-10-29 09:48:21,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:21,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698005520] [2020-10-29 09:48:21,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:21,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:21,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:21,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:22,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:22,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:48:22,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:22,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-29 09:48:22,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:22,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:22,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:48:22,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:48:22,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:48:22,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:22,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:22,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:22,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:22,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:22,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:22,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:22,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:22,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:22,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:22,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:22,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:22,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:48:22,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698005520] [2020-10-29 09:48:22,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:22,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:48:22,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591105133] [2020-10-29 09:48:22,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:48:22,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:22,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:48:22,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:48:22,346 INFO L87 Difference]: Start difference. First operand 78 states and 110 transitions. Second operand 8 states. [2020-10-29 09:48:22,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:22,979 INFO L93 Difference]: Finished difference Result 123 states and 167 transitions. [2020-10-29 09:48:22,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:48:22,980 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-29 09:48:22,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:22,980 INFO L225 Difference]: With dead ends: 123 [2020-10-29 09:48:22,981 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 09:48:22,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:48:22,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 09:48:22,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2020-10-29 09:48:22,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-29 09:48:22,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2020-10-29 09:48:22,993 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 23 [2020-10-29 09:48:22,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:22,994 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2020-10-29 09:48:22,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:48:22,994 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2020-10-29 09:48:22,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:48:22,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:22,995 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:22,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:48:22,995 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:22,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:22,995 INFO L82 PathProgramCache]: Analyzing trace with hash 558001170, now seen corresponding path program 3 times [2020-10-29 09:48:22,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:22,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867825490] [2020-10-29 09:48:22,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:23,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:23,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:23,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:23,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:23,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:24,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:24,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:48:24,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:48:24,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1517 [2020-10-29 09:48:24,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:24,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:24,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:48:24,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:24,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:48:24,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:24,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:24,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:24,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:24,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:24,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:24,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:24,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:24,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:24,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:24,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:24,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:24,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:48:24,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867825490] [2020-10-29 09:48:24,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:24,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:48:24,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129152368] [2020-10-29 09:48:24,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:48:24,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:24,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:48:24,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:48:24,743 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand 9 states. [2020-10-29 09:48:25,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:25,213 INFO L93 Difference]: Finished difference Result 76 states and 101 transitions. [2020-10-29 09:48:25,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:48:25,215 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-29 09:48:25,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:25,216 INFO L225 Difference]: With dead ends: 76 [2020-10-29 09:48:25,216 INFO L226 Difference]: Without dead ends: 70 [2020-10-29 09:48:25,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:48:25,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-29 09:48:25,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-10-29 09:48:25,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 09:48:25,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 93 transitions. [2020-10-29 09:48:25,233 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 93 transitions. Word has length 23 [2020-10-29 09:48:25,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:25,233 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 93 transitions. [2020-10-29 09:48:25,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:48:25,233 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 93 transitions. [2020-10-29 09:48:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:48:25,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:25,234 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:25,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:48:25,234 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:25,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:25,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1610493326, now seen corresponding path program 5 times [2020-10-29 09:48:25,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:25,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744298319] [2020-10-29 09:48:25,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:25,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:25,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:25,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:25,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:25,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:48:25,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:25,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 465 [2020-10-29 09:48:25,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:25,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:25,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:48:25,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:25,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:48:25,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:25,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:25,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:25,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:25,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:25,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:25,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:25,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:25,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:25,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:25,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:25,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:25,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:25,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744298319] [2020-10-29 09:48:25,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:25,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:48:25,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645769679] [2020-10-29 09:48:25,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:48:25,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:25,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:48:25,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:48:25,881 INFO L87 Difference]: Start difference. First operand 68 states and 93 transitions. Second operand 10 states. [2020-10-29 09:48:26,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:26,652 INFO L93 Difference]: Finished difference Result 121 states and 175 transitions. [2020-10-29 09:48:26,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:48:26,652 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-29 09:48:26,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:26,653 INFO L225 Difference]: With dead ends: 121 [2020-10-29 09:48:26,653 INFO L226 Difference]: Without dead ends: 104 [2020-10-29 09:48:26,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:48:26,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-29 09:48:26,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-29 09:48:26,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-29 09:48:26,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2020-10-29 09:48:26,670 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 23 [2020-10-29 09:48:26,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:26,670 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 101 transitions. [2020-10-29 09:48:26,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:48:26,670 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2020-10-29 09:48:26,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:48:26,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:26,672 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:26,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:48:26,673 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:26,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:26,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1187504274, now seen corresponding path program 2 times [2020-10-29 09:48:26,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:26,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691046180] [2020-10-29 09:48:26,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:26,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:26,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:26,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:26,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:27,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:27,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:48:27,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:48:27,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 667 [2020-10-29 09:48:27,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:27,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:27,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:48:27,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:48:27,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:48:27,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:27,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:27,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:27,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:27,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:27,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:27,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:27,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:27,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:27,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:27,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:27,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:27,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 09:48:27,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691046180] [2020-10-29 09:48:27,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:27,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:48:27,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864316974] [2020-10-29 09:48:27,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:48:27,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:27,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:48:27,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:48:27,443 INFO L87 Difference]: Start difference. First operand 74 states and 101 transitions. Second operand 6 states. [2020-10-29 09:48:27,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:27,716 INFO L93 Difference]: Finished difference Result 115 states and 161 transitions. [2020-10-29 09:48:27,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:48:27,716 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-29 09:48:27,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:27,717 INFO L225 Difference]: With dead ends: 115 [2020-10-29 09:48:27,718 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 09:48:27,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:48:27,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 09:48:27,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2020-10-29 09:48:27,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-29 09:48:27,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 128 transitions. [2020-10-29 09:48:27,735 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 128 transitions. Word has length 24 [2020-10-29 09:48:27,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:27,735 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 128 transitions. [2020-10-29 09:48:27,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:48:27,736 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 128 transitions. [2020-10-29 09:48:27,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:48:27,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:27,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:27,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:48:27,737 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:27,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:27,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1725511683, now seen corresponding path program 2 times [2020-10-29 09:48:27,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:27,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909934877] [2020-10-29 09:48:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:27,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:27,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:27,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:27,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:28,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:28,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:48:28,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:48:28,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-29 09:48:28,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:28,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:28,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:48:28,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:48:28,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:48:28,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:28,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:28,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:28,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:28,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:28,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:28,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:28,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:28,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:28,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:28,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:28,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:28,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 09:48:28,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909934877] [2020-10-29 09:48:28,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:28,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:48:28,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194883854] [2020-10-29 09:48:28,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:48:28,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:28,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:48:28,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:48:28,535 INFO L87 Difference]: Start difference. First operand 94 states and 128 transitions. Second operand 7 states. [2020-10-29 09:48:28,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:28,865 INFO L93 Difference]: Finished difference Result 125 states and 166 transitions. [2020-10-29 09:48:28,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:48:28,865 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-29 09:48:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:28,866 INFO L225 Difference]: With dead ends: 125 [2020-10-29 09:48:28,867 INFO L226 Difference]: Without dead ends: 119 [2020-10-29 09:48:28,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:48:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-29 09:48:28,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2020-10-29 09:48:28,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 09:48:28,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 136 transitions. [2020-10-29 09:48:28,885 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 136 transitions. Word has length 24 [2020-10-29 09:48:28,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:28,886 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 136 transitions. [2020-10-29 09:48:28,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:48:28,886 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 136 transitions. [2020-10-29 09:48:28,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:48:28,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:28,886 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:28,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:48:28,887 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:28,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:28,887 INFO L82 PathProgramCache]: Analyzing trace with hash -22309980, now seen corresponding path program 6 times [2020-10-29 09:48:28,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:28,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12300187] [2020-10-29 09:48:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:28,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:28,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:29,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:29,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:29,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:48:29,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:29,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 672 [2020-10-29 09:48:29,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:29,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:29,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:48:29,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:29,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:48:29,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:29,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:29,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:29,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:29,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:29,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:29,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:48:29,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:29,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:29,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:29,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:29,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:29,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:29,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12300187] [2020-10-29 09:48:29,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:29,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:48:29,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270582049] [2020-10-29 09:48:29,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:48:29,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:29,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:48:29,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:48:29,767 INFO L87 Difference]: Start difference. First operand 101 states and 136 transitions. Second operand 11 states. [2020-10-29 09:48:30,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:30,735 INFO L93 Difference]: Finished difference Result 198 states and 282 transitions. [2020-10-29 09:48:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:48:30,736 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-10-29 09:48:30,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:30,737 INFO L225 Difference]: With dead ends: 198 [2020-10-29 09:48:30,737 INFO L226 Difference]: Without dead ends: 171 [2020-10-29 09:48:30,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:48:30,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-29 09:48:30,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 109. [2020-10-29 09:48:30,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-29 09:48:30,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 147 transitions. [2020-10-29 09:48:30,757 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 147 transitions. Word has length 24 [2020-10-29 09:48:30,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:30,757 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 147 transitions. [2020-10-29 09:48:30,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:48:30,757 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 147 transitions. [2020-10-29 09:48:30,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:48:30,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:30,758 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:30,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:48:30,758 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:30,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:30,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1966733490, now seen corresponding path program 7 times [2020-10-29 09:48:30,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:30,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645383006] [2020-10-29 09:48:30,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:30,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:30,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:30,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:31,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:31,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:48:31,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:31,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 965 [2020-10-29 09:48:31,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:31,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:31,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:48:31,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:31,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:48:31,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:31,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:31,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:31,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:31,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:31,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:31,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:48:31,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:31,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:31,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:31,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:31,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:31,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:31,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645383006] [2020-10-29 09:48:31,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:31,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:48:31,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711460043] [2020-10-29 09:48:31,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:48:31,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:31,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:48:31,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:48:31,947 INFO L87 Difference]: Start difference. First operand 109 states and 147 transitions. Second operand 12 states. [2020-10-29 09:48:33,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:33,150 INFO L93 Difference]: Finished difference Result 214 states and 306 transitions. [2020-10-29 09:48:33,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:48:33,151 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-29 09:48:33,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:33,152 INFO L225 Difference]: With dead ends: 214 [2020-10-29 09:48:33,152 INFO L226 Difference]: Without dead ends: 187 [2020-10-29 09:48:33,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:48:33,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-29 09:48:33,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 117. [2020-10-29 09:48:33,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-29 09:48:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 158 transitions. [2020-10-29 09:48:33,172 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 158 transitions. Word has length 25 [2020-10-29 09:48:33,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:33,172 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 158 transitions. [2020-10-29 09:48:33,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:48:33,172 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 158 transitions. [2020-10-29 09:48:33,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:48:33,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:33,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:33,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:48:33,174 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:33,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:33,174 INFO L82 PathProgramCache]: Analyzing trace with hash 218402755, now seen corresponding path program 2 times [2020-10-29 09:48:33,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:33,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635758527] [2020-10-29 09:48:33,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:33,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:33,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:33,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:33,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:33,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:48:33,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:33,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 678 [2020-10-29 09:48:33,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:33,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:33,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:48:33,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:33,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:48:33,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:34,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:34,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:34,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:34,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:34,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:34,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:34,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:34,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:34,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:34,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:34,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:34,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 09:48:34,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635758527] [2020-10-29 09:48:34,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:34,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:48:34,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946493640] [2020-10-29 09:48:34,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:48:34,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:34,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:48:34,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:48:34,122 INFO L87 Difference]: Start difference. First operand 117 states and 158 transitions. Second operand 12 states. [2020-10-29 09:48:35,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:35,068 INFO L93 Difference]: Finished difference Result 138 states and 183 transitions. [2020-10-29 09:48:35,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:48:35,072 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-29 09:48:35,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:35,073 INFO L225 Difference]: With dead ends: 138 [2020-10-29 09:48:35,074 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 09:48:35,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:48:35,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 09:48:35,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2020-10-29 09:48:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-29 09:48:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 158 transitions. [2020-10-29 09:48:35,090 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 158 transitions. Word has length 26 [2020-10-29 09:48:35,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:35,090 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 158 transitions. [2020-10-29 09:48:35,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:48:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 158 transitions. [2020-10-29 09:48:35,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:48:35,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:35,091 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:35,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:48:35,092 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:35,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:35,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1871485419, now seen corresponding path program 3 times [2020-10-29 09:48:35,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:35,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025813444] [2020-10-29 09:48:35,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:35,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:35,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:35,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:35,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:35,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:35,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:36,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:38,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:38,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:48:38,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:48:38,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3494 [2020-10-29 09:48:38,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:38,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:38,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:48:38,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:48:38,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:48:38,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:38,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:38,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:38,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:38,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:38,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:38,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:38,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:38,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:38,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:38,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:38,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:38,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:48:38,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025813444] [2020-10-29 09:48:38,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:38,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:48:38,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819571816] [2020-10-29 09:48:38,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:48:38,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:38,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:48:38,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:48:38,725 INFO L87 Difference]: Start difference. First operand 118 states and 158 transitions. Second operand 6 states. [2020-10-29 09:48:39,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:39,203 INFO L93 Difference]: Finished difference Result 147 states and 199 transitions. [2020-10-29 09:48:39,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:48:39,203 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-29 09:48:39,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:39,205 INFO L225 Difference]: With dead ends: 147 [2020-10-29 09:48:39,205 INFO L226 Difference]: Without dead ends: 136 [2020-10-29 09:48:39,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:48:39,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-29 09:48:39,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 122. [2020-10-29 09:48:39,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-29 09:48:39,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 162 transitions. [2020-10-29 09:48:39,225 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 162 transitions. Word has length 26 [2020-10-29 09:48:39,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:39,226 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 162 transitions. [2020-10-29 09:48:39,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:48:39,226 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 162 transitions. [2020-10-29 09:48:39,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:48:39,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:39,227 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:39,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:48:39,228 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:39,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:39,229 INFO L82 PathProgramCache]: Analyzing trace with hash -343038989, now seen corresponding path program 4 times [2020-10-29 09:48:39,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:39,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203764642] [2020-10-29 09:48:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:39,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:39,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:39,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:39,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:39,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:41,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:41,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:48:41,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:48:41,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1862 [2020-10-29 09:48:41,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:41,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:41,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:48:41,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:41,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:48:41,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:41,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:41,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:41,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:41,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:41,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:41,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:41,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:41,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:41,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:41,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:41,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:41,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:48:41,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203764642] [2020-10-29 09:48:41,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:41,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:48:41,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764776173] [2020-10-29 09:48:41,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:48:41,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:41,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:48:41,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:48:41,341 INFO L87 Difference]: Start difference. First operand 122 states and 162 transitions. Second operand 10 states. [2020-10-29 09:48:42,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:42,016 INFO L93 Difference]: Finished difference Result 153 states and 201 transitions. [2020-10-29 09:48:42,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:48:42,017 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-29 09:48:42,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:42,018 INFO L225 Difference]: With dead ends: 153 [2020-10-29 09:48:42,018 INFO L226 Difference]: Without dead ends: 147 [2020-10-29 09:48:42,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:48:42,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-29 09:48:42,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 140. [2020-10-29 09:48:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-29 09:48:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 188 transitions. [2020-10-29 09:48:42,039 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 188 transitions. Word has length 26 [2020-10-29 09:48:42,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:42,040 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 188 transitions. [2020-10-29 09:48:42,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:48:42,040 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 188 transitions. [2020-10-29 09:48:42,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:48:42,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:42,040 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:42,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:48:42,042 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:42,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:42,043 INFO L82 PathProgramCache]: Analyzing trace with hash -797428380, now seen corresponding path program 8 times [2020-10-29 09:48:42,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:42,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757500778] [2020-10-29 09:48:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:42,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:42,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:42,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:43,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:43,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:48:43,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:43,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1160 [2020-10-29 09:48:43,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:43,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:43,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:48:43,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:43,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:48:43,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:43,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:43,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:43,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:43,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:43,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:43,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:43,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:43,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:43,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:43,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:43,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:43,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:43,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757500778] [2020-10-29 09:48:43,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:43,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:48:43,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030245278] [2020-10-29 09:48:43,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:48:43,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:43,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:48:43,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:48:43,462 INFO L87 Difference]: Start difference. First operand 140 states and 188 transitions. Second operand 13 states. [2020-10-29 09:48:44,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:44,910 INFO L93 Difference]: Finished difference Result 273 states and 385 transitions. [2020-10-29 09:48:44,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:48:44,912 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-29 09:48:44,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:44,914 INFO L225 Difference]: With dead ends: 273 [2020-10-29 09:48:44,914 INFO L226 Difference]: Without dead ends: 242 [2020-10-29 09:48:44,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:48:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-29 09:48:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 148. [2020-10-29 09:48:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-29 09:48:44,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 199 transitions. [2020-10-29 09:48:44,940 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 199 transitions. Word has length 26 [2020-10-29 09:48:44,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:44,940 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 199 transitions. [2020-10-29 09:48:44,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:48:44,941 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 199 transitions. [2020-10-29 09:48:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:48:44,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:44,942 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:44,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:48:44,942 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:44,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:44,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1903951519, now seen corresponding path program 3 times [2020-10-29 09:48:44,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:44,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691470569] [2020-10-29 09:48:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:44,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:44,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:44,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:45,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:45,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:47,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:47,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:48:47,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:48:47,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2636 [2020-10-29 09:48:47,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:47,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:47,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:48:47,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:48:47,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:48:47,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:47,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:47,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:47,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:47,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:47,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:47,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:48:47,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:47,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:47,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:47,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:47,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:47,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 09:48:47,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691470569] [2020-10-29 09:48:47,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:47,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:48:47,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399489649] [2020-10-29 09:48:47,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:48:47,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:47,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:48:47,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:48:47,710 INFO L87 Difference]: Start difference. First operand 148 states and 199 transitions. Second operand 7 states. [2020-10-29 09:48:48,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:48,146 INFO L93 Difference]: Finished difference Result 214 states and 298 transitions. [2020-10-29 09:48:48,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:48:48,146 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-29 09:48:48,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:48,148 INFO L225 Difference]: With dead ends: 214 [2020-10-29 09:48:48,148 INFO L226 Difference]: Without dead ends: 198 [2020-10-29 09:48:48,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:48:48,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-29 09:48:48,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 180. [2020-10-29 09:48:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-29 09:48:48,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 242 transitions. [2020-10-29 09:48:48,172 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 242 transitions. Word has length 27 [2020-10-29 09:48:48,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:48,172 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 242 transitions. [2020-10-29 09:48:48,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:48:48,172 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 242 transitions. [2020-10-29 09:48:48,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:48:48,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:48,173 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:48,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:48:48,173 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:48,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:48,173 INFO L82 PathProgramCache]: Analyzing trace with hash -574128544, now seen corresponding path program 4 times [2020-10-29 09:48:48,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:48,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388596430] [2020-10-29 09:48:48,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:48,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:48,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:48,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:48,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:48,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:48,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:48,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:48:48,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:48:48,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 758 [2020-10-29 09:48:48,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:48,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:48,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:48:48,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:48:48,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:48:48,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:49,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:49,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:49,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:49,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:49,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:49,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:48:49,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:49,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:49,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:49,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:49,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:49,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:48:49,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388596430] [2020-10-29 09:48:49,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:49,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:48:49,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678093625] [2020-10-29 09:48:49,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:48:49,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:49,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:48:49,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:48:49,100 INFO L87 Difference]: Start difference. First operand 180 states and 242 transitions. Second operand 9 states. [2020-10-29 09:48:49,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:49,823 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2020-10-29 09:48:49,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:48:49,824 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-29 09:48:49,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:49,825 INFO L225 Difference]: With dead ends: 215 [2020-10-29 09:48:49,826 INFO L226 Difference]: Without dead ends: 205 [2020-10-29 09:48:49,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:48:49,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-29 09:48:49,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 182. [2020-10-29 09:48:49,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-29 09:48:49,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 244 transitions. [2020-10-29 09:48:49,849 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 244 transitions. Word has length 27 [2020-10-29 09:48:49,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:49,849 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 244 transitions. [2020-10-29 09:48:49,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:48:49,849 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 244 transitions. [2020-10-29 09:48:49,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:48:49,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:49,850 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:49,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:48:49,851 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:49,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:49,851 INFO L82 PathProgramCache]: Analyzing trace with hash -436929470, now seen corresponding path program 5 times [2020-10-29 09:48:49,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:49,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152387298] [2020-10-29 09:48:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:49,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:49,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:49,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:50,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:50,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:50,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:48:50,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:48:50,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 709 [2020-10-29 09:48:50,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:50,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:50,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:48:50,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:48:50,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:48:50,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:50,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:50,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:50,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:50,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:50,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:50,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:50,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:50,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:50,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:50,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:50,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:50,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 09:48:50,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152387298] [2020-10-29 09:48:50,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:50,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:48:50,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770697057] [2020-10-29 09:48:50,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:48:50,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:50,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:48:50,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:48:50,682 INFO L87 Difference]: Start difference. First operand 182 states and 244 transitions. Second operand 8 states. [2020-10-29 09:48:51,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:51,182 INFO L93 Difference]: Finished difference Result 262 states and 369 transitions. [2020-10-29 09:48:51,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:48:51,182 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-29 09:48:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:51,184 INFO L225 Difference]: With dead ends: 262 [2020-10-29 09:48:51,184 INFO L226 Difference]: Without dead ends: 243 [2020-10-29 09:48:51,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:48:51,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-29 09:48:51,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 215. [2020-10-29 09:48:51,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-29 09:48:51,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 287 transitions. [2020-10-29 09:48:51,212 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 287 transitions. Word has length 27 [2020-10-29 09:48:51,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:51,212 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 287 transitions. [2020-10-29 09:48:51,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:48:51,212 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 287 transitions. [2020-10-29 09:48:51,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:48:51,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:51,213 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:51,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:48:51,213 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:51,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:51,214 INFO L82 PathProgramCache]: Analyzing trace with hash -587100430, now seen corresponding path program 9 times [2020-10-29 09:48:51,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:51,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630622696] [2020-10-29 09:48:51,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:51,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:51,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:51,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:51,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:51,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:48:51,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:51,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 743 [2020-10-29 09:48:51,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:51,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:51,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:48:51,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:51,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:48:51,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:52,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:52,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:52,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:52,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:52,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:52,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:48:52,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:52,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:52,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:52,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:52,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:52,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:52,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630622696] [2020-10-29 09:48:52,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:52,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:48:52,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859518516] [2020-10-29 09:48:52,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:48:52,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:52,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:48:52,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:48:52,225 INFO L87 Difference]: Start difference. First operand 215 states and 287 transitions. Second operand 14 states. [2020-10-29 09:48:53,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:53,911 INFO L93 Difference]: Finished difference Result 400 states and 561 transitions. [2020-10-29 09:48:53,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:48:53,912 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-10-29 09:48:53,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:53,914 INFO L225 Difference]: With dead ends: 400 [2020-10-29 09:48:53,914 INFO L226 Difference]: Without dead ends: 355 [2020-10-29 09:48:53,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:48:53,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-29 09:48:53,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 227. [2020-10-29 09:48:53,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-29 09:48:53,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 304 transitions. [2020-10-29 09:48:53,946 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 304 transitions. Word has length 27 [2020-10-29 09:48:53,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:53,947 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 304 transitions. [2020-10-29 09:48:53,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:48:53,947 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 304 transitions. [2020-10-29 09:48:53,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:48:53,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:53,948 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:53,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:48:53,948 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:53,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:53,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1748525454, now seen corresponding path program 3 times [2020-10-29 09:48:53,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:53,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970979266] [2020-10-29 09:48:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:53,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:54,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:54,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:54,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:54,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:48:54,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:54,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 509 [2020-10-29 09:48:54,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:54,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:54,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:48:54,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:48:54,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:48:54,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:54,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:54,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:54,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:54,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:54,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:54,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:54,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:54,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:54,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:54,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:54,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:54,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:48:54,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970979266] [2020-10-29 09:48:54,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:54,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:48:54,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252685280] [2020-10-29 09:48:54,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:48:54,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:54,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:48:54,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:48:54,641 INFO L87 Difference]: Start difference. First operand 227 states and 304 transitions. Second operand 10 states. [2020-10-29 09:48:55,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:55,460 INFO L93 Difference]: Finished difference Result 320 states and 400 transitions. [2020-10-29 09:48:55,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:48:55,461 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-29 09:48:55,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:55,463 INFO L225 Difference]: With dead ends: 320 [2020-10-29 09:48:55,463 INFO L226 Difference]: Without dead ends: 235 [2020-10-29 09:48:55,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:48:55,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-29 09:48:55,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 178. [2020-10-29 09:48:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-29 09:48:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 238 transitions. [2020-10-29 09:48:55,489 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 238 transitions. Word has length 28 [2020-10-29 09:48:55,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:55,489 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 238 transitions. [2020-10-29 09:48:55,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:48:55,490 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 238 transitions. [2020-10-29 09:48:55,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:48:55,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:55,490 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:55,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:48:55,491 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:55,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:55,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1084631989, now seen corresponding path program 6 times [2020-10-29 09:48:55,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:55,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608262087] [2020-10-29 09:48:55,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:55,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:55,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:55,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:55,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:55,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:56,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:57,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:00,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:00,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:49:00,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:49:00,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 09:49:00,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:00,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:00,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:49:00,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:00,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:49:00,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:00,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:00,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:00,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:00,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:00,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:00,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:49:00,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:00,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:00,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:00,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:00,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:00,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:49:00,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608262087] [2020-10-29 09:49:00,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:00,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:49:00,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424099394] [2020-10-29 09:49:00,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:49:00,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:00,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:49:00,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:49:00,732 INFO L87 Difference]: Start difference. First operand 178 states and 238 transitions. Second operand 11 states. [2020-10-29 09:49:01,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:01,421 INFO L93 Difference]: Finished difference Result 202 states and 270 transitions. [2020-10-29 09:49:01,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:49:01,422 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-29 09:49:01,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:01,424 INFO L225 Difference]: With dead ends: 202 [2020-10-29 09:49:01,424 INFO L226 Difference]: Without dead ends: 196 [2020-10-29 09:49:01,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:49:01,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-29 09:49:01,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 187. [2020-10-29 09:49:01,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-29 09:49:01,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 251 transitions. [2020-10-29 09:49:01,447 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 251 transitions. Word has length 28 [2020-10-29 09:49:01,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:01,448 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 251 transitions. [2020-10-29 09:49:01,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:49:01,448 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 251 transitions. [2020-10-29 09:49:01,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:49:01,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:01,449 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:01,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:49:01,449 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:01,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:01,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1681888877, now seen corresponding path program 5 times [2020-10-29 09:49:01,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:01,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512453360] [2020-10-29 09:49:01,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:01,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:01,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:01,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:01,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:02,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:05,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:05,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:49:05,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:49:05,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4081 [2020-10-29 09:49:05,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:05,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:05,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:49:05,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:49:05,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:49:05,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:05,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:05,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:05,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:05,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:05,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:05,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:49:05,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:05,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:05,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:05,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:05,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:05,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 09:49:05,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512453360] [2020-10-29 09:49:05,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:05,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:49:05,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625532664] [2020-10-29 09:49:05,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:49:05,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:05,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:49:05,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:49:05,687 INFO L87 Difference]: Start difference. First operand 187 states and 251 transitions. Second operand 9 states. [2020-10-29 09:49:06,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:06,404 INFO L93 Difference]: Finished difference Result 263 states and 372 transitions. [2020-10-29 09:49:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:49:06,405 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-29 09:49:06,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:06,407 INFO L225 Difference]: With dead ends: 263 [2020-10-29 09:49:06,407 INFO L226 Difference]: Without dead ends: 246 [2020-10-29 09:49:06,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:49:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-29 09:49:06,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 211. [2020-10-29 09:49:06,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-29 09:49:06,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 284 transitions. [2020-10-29 09:49:06,434 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 284 transitions. Word has length 28 [2020-10-29 09:49:06,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:06,434 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 284 transitions. [2020-10-29 09:49:06,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:49:06,434 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 284 transitions. [2020-10-29 09:49:06,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:49:06,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:06,435 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:06,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:49:06,435 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:06,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:06,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1638098724, now seen corresponding path program 10 times [2020-10-29 09:49:06,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:06,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262923994] [2020-10-29 09:49:06,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:06,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:06,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:06,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:07,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:07,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:49:07,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:49:07,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-10-29 09:49:07,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:07,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:07,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:49:07,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:07,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:49:07,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:07,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:07,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:07,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:07,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:07,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:07,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:49:07,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:07,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:07,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:07,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:07,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:07,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:07,536 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:07,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262923994] [2020-10-29 09:49:07,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:07,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:49:07,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833035846] [2020-10-29 09:49:07,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:49:07,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:07,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:49:07,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:49:07,537 INFO L87 Difference]: Start difference. First operand 211 states and 284 transitions. Second operand 15 states. [2020-10-29 09:49:09,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:09,528 INFO L93 Difference]: Finished difference Result 368 states and 528 transitions. [2020-10-29 09:49:09,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:49:09,529 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-10-29 09:49:09,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:09,531 INFO L225 Difference]: With dead ends: 368 [2020-10-29 09:49:09,531 INFO L226 Difference]: Without dead ends: 320 [2020-10-29 09:49:09,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:49:09,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-29 09:49:09,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 224. [2020-10-29 09:49:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-29 09:49:09,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 302 transitions. [2020-10-29 09:49:09,562 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 302 transitions. Word has length 28 [2020-10-29 09:49:09,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:09,563 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 302 transitions. [2020-10-29 09:49:09,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:49:09,563 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 302 transitions. [2020-10-29 09:49:09,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:49:09,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:09,564 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:09,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:49:09,564 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:09,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:09,564 INFO L82 PathProgramCache]: Analyzing trace with hash 912993890, now seen corresponding path program 7 times [2020-10-29 09:49:09,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:09,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869937085] [2020-10-29 09:49:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:09,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:09,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:09,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:09,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:49:09,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:09,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-29 09:49:09,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:09,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:09,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:49:09,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 09:49:09,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:49:09,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:09,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:09,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:09,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:09,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:09,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:09,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:49:09,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:09,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:09,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:09,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:09,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:09,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-29 09:49:09,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869937085] [2020-10-29 09:49:09,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:09,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:49:09,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390418141] [2020-10-29 09:49:09,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:49:09,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:09,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:49:09,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:49:09,933 INFO L87 Difference]: Start difference. First operand 224 states and 302 transitions. Second operand 7 states. [2020-10-29 09:49:10,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:10,320 INFO L93 Difference]: Finished difference Result 346 states and 429 transitions. [2020-10-29 09:49:10,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:49:10,320 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-29 09:49:10,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:10,323 INFO L225 Difference]: With dead ends: 346 [2020-10-29 09:49:10,323 INFO L226 Difference]: Without dead ends: 340 [2020-10-29 09:49:10,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:49:10,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-29 09:49:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 243. [2020-10-29 09:49:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-29 09:49:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 325 transitions. [2020-10-29 09:49:10,361 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 325 transitions. Word has length 29 [2020-10-29 09:49:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:10,361 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 325 transitions. [2020-10-29 09:49:10,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:49:10,361 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 325 transitions. [2020-10-29 09:49:10,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:49:10,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:10,362 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:10,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:49:10,363 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:10,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:10,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1899795762, now seen corresponding path program 11 times [2020-10-29 09:49:10,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:10,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172635085] [2020-10-29 09:49:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:10,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:10,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:10,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:11,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:11,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:49:11,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:49:11,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1099 [2020-10-29 09:49:11,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:11,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:11,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:49:11,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:11,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:49:11,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:11,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:11,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:11,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:11,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:11,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:11,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:49:11,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:11,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:11,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:11,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:11,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:11,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:11,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172635085] [2020-10-29 09:49:11,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:11,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:49:11,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292625935] [2020-10-29 09:49:11,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:49:11,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:11,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:49:11,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:49:11,795 INFO L87 Difference]: Start difference. First operand 243 states and 325 transitions. Second operand 16 states. [2020-10-29 09:49:13,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:13,979 INFO L93 Difference]: Finished difference Result 441 states and 629 transitions. [2020-10-29 09:49:13,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:49:13,980 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2020-10-29 09:49:13,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:13,982 INFO L225 Difference]: With dead ends: 441 [2020-10-29 09:49:13,982 INFO L226 Difference]: Without dead ends: 385 [2020-10-29 09:49:13,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:49:13,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-29 09:49:14,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 256. [2020-10-29 09:49:14,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-29 09:49:14,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 343 transitions. [2020-10-29 09:49:14,009 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 343 transitions. Word has length 29 [2020-10-29 09:49:14,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:14,009 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 343 transitions. [2020-10-29 09:49:14,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:49:14,009 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 343 transitions. [2020-10-29 09:49:14,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:49:14,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:14,010 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:14,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:49:14,011 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:14,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:14,011 INFO L82 PathProgramCache]: Analyzing trace with hash -692623294, now seen corresponding path program 4 times [2020-10-29 09:49:14,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:14,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430133757] [2020-10-29 09:49:14,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:14,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:14,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:14,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:14,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:49:14,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:14,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-29 09:49:14,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:14,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:14,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:49:14,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 09:49:14,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:49:14,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:14,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:14,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:14,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:14,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:14,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:14,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:49:14,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:14,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:14,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:14,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:14,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:14,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-29 09:49:14,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430133757] [2020-10-29 09:49:14,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:14,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:49:14,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297799798] [2020-10-29 09:49:14,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:49:14,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:14,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:49:14,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:49:14,404 INFO L87 Difference]: Start difference. First operand 256 states and 343 transitions. Second operand 8 states. [2020-10-29 09:49:14,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:14,943 INFO L93 Difference]: Finished difference Result 419 states and 515 transitions. [2020-10-29 09:49:14,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:49:14,944 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-29 09:49:14,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:14,946 INFO L225 Difference]: With dead ends: 419 [2020-10-29 09:49:14,946 INFO L226 Difference]: Without dead ends: 395 [2020-10-29 09:49:14,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:49:14,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-10-29 09:49:14,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 272. [2020-10-29 09:49:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-29 09:49:14,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 360 transitions. [2020-10-29 09:49:14,980 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 360 transitions. Word has length 30 [2020-10-29 09:49:14,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:14,980 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 360 transitions. [2020-10-29 09:49:14,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:49:14,981 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 360 transitions. [2020-10-29 09:49:14,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:49:14,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:14,982 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:14,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:49:14,982 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:14,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1422469348, now seen corresponding path program 12 times [2020-10-29 09:49:14,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:14,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841971279] [2020-10-29 09:49:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:15,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:15,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:15,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:15,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:15,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:49:15,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:49:15,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 934 [2020-10-29 09:49:15,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:15,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:15,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:49:15,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:15,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:49:15,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:16,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:16,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:16,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:16,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:16,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:16,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:49:16,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:16,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:16,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:16,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:16,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:16,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:16,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841971279] [2020-10-29 09:49:16,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:16,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:49:16,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239647246] [2020-10-29 09:49:16,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:49:16,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:16,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:49:16,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:49:16,281 INFO L87 Difference]: Start difference. First operand 272 states and 360 transitions. Second operand 17 states. [2020-10-29 09:49:18,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:18,808 INFO L93 Difference]: Finished difference Result 560 states and 774 transitions. [2020-10-29 09:49:18,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:49:18,809 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2020-10-29 09:49:18,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:18,811 INFO L225 Difference]: With dead ends: 560 [2020-10-29 09:49:18,812 INFO L226 Difference]: Without dead ends: 496 [2020-10-29 09:49:18,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:49:18,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2020-10-29 09:49:18,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 285. [2020-10-29 09:49:18,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-10-29 09:49:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 378 transitions. [2020-10-29 09:49:18,847 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 378 transitions. Word has length 30 [2020-10-29 09:49:18,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:18,848 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 378 transitions. [2020-10-29 09:49:18,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:49:18,848 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 378 transitions. [2020-10-29 09:49:18,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:49:18,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:18,849 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:18,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:49:18,849 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:18,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:18,850 INFO L82 PathProgramCache]: Analyzing trace with hash -489747598, now seen corresponding path program 13 times [2020-10-29 09:49:18,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:18,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52319843] [2020-10-29 09:49:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:18,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:18,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:19,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:20,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:20,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:49:20,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:49:20,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1271 [2020-10-29 09:49:20,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:20,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:20,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:49:20,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:20,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:49:20,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:20,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:20,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:20,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:20,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:20,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:20,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:49:20,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:20,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:20,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:20,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:20,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:20,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:20,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52319843] [2020-10-29 09:49:20,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:20,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:49:20,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555090485] [2020-10-29 09:49:20,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:49:20,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:20,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:49:20,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:49:20,498 INFO L87 Difference]: Start difference. First operand 285 states and 378 transitions. Second operand 18 states. [2020-10-29 09:49:23,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:23,275 INFO L93 Difference]: Finished difference Result 587 states and 814 transitions. [2020-10-29 09:49:23,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:49:23,276 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-10-29 09:49:23,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:23,278 INFO L225 Difference]: With dead ends: 587 [2020-10-29 09:49:23,278 INFO L226 Difference]: Without dead ends: 523 [2020-10-29 09:49:23,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:49:23,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-10-29 09:49:23,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 298. [2020-10-29 09:49:23,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-29 09:49:23,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 396 transitions. [2020-10-29 09:49:23,309 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 396 transitions. Word has length 31 [2020-10-29 09:49:23,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:23,309 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 396 transitions. [2020-10-29 09:49:23,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:49:23,309 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 396 transitions. [2020-10-29 09:49:23,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:49:23,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:23,310 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:23,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:49:23,310 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:23,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:23,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1147435006, now seen corresponding path program 5 times [2020-10-29 09:49:23,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:23,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524362477] [2020-10-29 09:49:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:23,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:23,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:23,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:23,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:28,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:28,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:49:28,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:49:28,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 09:49:28,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:28,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:28,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:49:28,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:28,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:49:28,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:28,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:28,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:28,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:28,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:28,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:28,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:49:28,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:28,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:28,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:28,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:28,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:28,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-29 09:49:28,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524362477] [2020-10-29 09:49:28,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:28,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:49:28,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005266608] [2020-10-29 09:49:28,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:49:28,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:28,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:49:28,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:49:28,880 INFO L87 Difference]: Start difference. First operand 298 states and 396 transitions. Second operand 14 states. [2020-10-29 09:49:29,450 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2020-10-29 09:49:29,600 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-29 09:49:33,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:33,927 INFO L93 Difference]: Finished difference Result 310 states and 408 transitions. [2020-10-29 09:49:33,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:49:33,928 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-29 09:49:33,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:33,929 INFO L225 Difference]: With dead ends: 310 [2020-10-29 09:49:33,929 INFO L226 Difference]: Without dead ends: 282 [2020-10-29 09:49:33,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=137, Invalid=732, Unknown=1, NotChecked=0, Total=870 [2020-10-29 09:49:33,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-29 09:49:33,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2020-10-29 09:49:33,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-29 09:49:33,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 377 transitions. [2020-10-29 09:49:33,965 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 377 transitions. Word has length 32 [2020-10-29 09:49:33,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:33,965 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 377 transitions. [2020-10-29 09:49:33,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:49:33,965 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 377 transitions. [2020-10-29 09:49:33,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:49:33,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:33,966 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:33,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:49:33,966 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:33,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:33,967 INFO L82 PathProgramCache]: Analyzing trace with hash -842852494, now seen corresponding path program 6 times [2020-10-29 09:49:33,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:33,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580455463] [2020-10-29 09:49:33,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:33,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:34,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:34,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:34,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:36,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:36,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:49:36,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:49:36,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2131 [2020-10-29 09:49:36,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:36,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:36,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:49:36,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 09:49:36,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:49:36,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:36,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:36,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:36,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:36,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:36,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:36,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:49:36,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:36,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:36,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:36,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:36,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:36,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-29 09:49:36,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580455463] [2020-10-29 09:49:36,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:36,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:49:36,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149889072] [2020-10-29 09:49:36,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:49:36,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:36,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:49:36,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:49:36,265 INFO L87 Difference]: Start difference. First operand 282 states and 377 transitions. Second operand 9 states. [2020-10-29 09:49:36,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:36,926 INFO L93 Difference]: Finished difference Result 497 states and 602 transitions. [2020-10-29 09:49:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:49:36,927 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-29 09:49:36,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:36,930 INFO L225 Difference]: With dead ends: 497 [2020-10-29 09:49:36,930 INFO L226 Difference]: Without dead ends: 490 [2020-10-29 09:49:36,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:49:36,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-10-29 09:49:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 318. [2020-10-29 09:49:36,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-29 09:49:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 418 transitions. [2020-10-29 09:49:36,964 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 418 transitions. Word has length 32 [2020-10-29 09:49:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:36,965 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 418 transitions. [2020-10-29 09:49:36,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:49:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 418 transitions. [2020-10-29 09:49:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:49:36,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:36,966 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:36,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:49:36,966 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:36,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:36,967 INFO L82 PathProgramCache]: Analyzing trace with hash 361069220, now seen corresponding path program 14 times [2020-10-29 09:49:36,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:36,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221658592] [2020-10-29 09:49:36,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:36,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:37,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:37,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:39,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:39,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:49:39,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:49:39,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2052 [2020-10-29 09:49:39,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:39,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:39,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:49:39,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:39,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:49:39,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:39,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:39,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:39,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:39,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:39,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:39,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:49:39,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:39,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:39,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:39,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:39,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:39,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:39,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221658592] [2020-10-29 09:49:39,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:39,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:49:39,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708908994] [2020-10-29 09:49:39,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:49:39,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:39,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:49:39,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:49:39,461 INFO L87 Difference]: Start difference. First operand 318 states and 418 transitions. Second operand 19 states. [2020-10-29 09:49:42,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:42,726 INFO L93 Difference]: Finished difference Result 667 states and 910 transitions. [2020-10-29 09:49:42,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:49:42,727 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-10-29 09:49:42,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:42,730 INFO L225 Difference]: With dead ends: 667 [2020-10-29 09:49:42,730 INFO L226 Difference]: Without dead ends: 595 [2020-10-29 09:49:42,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:49:42,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-29 09:49:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 331. [2020-10-29 09:49:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-10-29 09:49:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 436 transitions. [2020-10-29 09:49:42,769 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 436 transitions. Word has length 32 [2020-10-29 09:49:42,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:42,770 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 436 transitions. [2020-10-29 09:49:42,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:49:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 436 transitions. [2020-10-29 09:49:42,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:49:42,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:42,771 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:42,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:49:42,771 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:42,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:42,772 INFO L82 PathProgramCache]: Analyzing trace with hash 966586802, now seen corresponding path program 15 times [2020-10-29 09:49:42,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:42,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916791447] [2020-10-29 09:49:42,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:42,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:43,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:43,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:44,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:44,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:49:44,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:49:44,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1972 [2020-10-29 09:49:44,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:44,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:44,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:49:44,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:44,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:49:44,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:45,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:45,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:45,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:45,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:45,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:45,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:49:45,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:45,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:45,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:45,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:45,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:45,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:45,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916791447] [2020-10-29 09:49:45,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:45,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:49:45,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821689065] [2020-10-29 09:49:45,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:49:45,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:45,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:49:45,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:49:45,219 INFO L87 Difference]: Start difference. First operand 331 states and 436 transitions. Second operand 20 states. [2020-10-29 09:49:48,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:48,858 INFO L93 Difference]: Finished difference Result 695 states and 951 transitions. [2020-10-29 09:49:48,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:49:48,860 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2020-10-29 09:49:48,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:48,862 INFO L225 Difference]: With dead ends: 695 [2020-10-29 09:49:48,862 INFO L226 Difference]: Without dead ends: 623 [2020-10-29 09:49:48,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:49:48,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-10-29 09:49:48,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 344. [2020-10-29 09:49:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-29 09:49:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 454 transitions. [2020-10-29 09:49:48,906 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 454 transitions. Word has length 33 [2020-10-29 09:49:48,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:48,906 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 454 transitions. [2020-10-29 09:49:48,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:49:48,906 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 454 transitions. [2020-10-29 09:49:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:49:48,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:48,908 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:48,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:49:48,908 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:48,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:48,908 INFO L82 PathProgramCache]: Analyzing trace with hash -464631358, now seen corresponding path program 7 times [2020-10-29 09:49:48,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:48,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557046898] [2020-10-29 09:49:48,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:48,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:48,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:49,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:49,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:49,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:52,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:52,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:49:52,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:49:52,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3685 [2020-10-29 09:49:52,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:52,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:52,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:49:52,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:49:52,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:49:52,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:52,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:52,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:52,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:52,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:52,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:52,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:49:52,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:52,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:52,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:52,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:52,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:52,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-29 09:49:52,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557046898] [2020-10-29 09:49:52,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:52,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:49:52,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543049913] [2020-10-29 09:49:52,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:49:52,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:52,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:49:52,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:49:52,859 INFO L87 Difference]: Start difference. First operand 344 states and 454 transitions. Second operand 13 states. [2020-10-29 09:49:54,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:54,188 INFO L93 Difference]: Finished difference Result 436 states and 546 transitions. [2020-10-29 09:49:54,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:49:54,189 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-29 09:49:54,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:54,192 INFO L225 Difference]: With dead ends: 436 [2020-10-29 09:49:54,192 INFO L226 Difference]: Without dead ends: 425 [2020-10-29 09:49:54,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:49:54,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-10-29 09:49:54,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 348. [2020-10-29 09:49:54,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-10-29 09:49:54,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 457 transitions. [2020-10-29 09:49:54,220 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 457 transitions. Word has length 34 [2020-10-29 09:49:54,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:54,221 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 457 transitions. [2020-10-29 09:49:54,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:49:54,221 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 457 transitions. [2020-10-29 09:49:54,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:49:54,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:54,222 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:54,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:49:54,222 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:54,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:54,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1013834366, now seen corresponding path program 8 times [2020-10-29 09:49:54,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:54,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424489278] [2020-10-29 09:49:54,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:54,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:54,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:54,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:54,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:54,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:58,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:58,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:49:58,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:49:58,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4727 [2020-10-29 09:49:58,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:58,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:58,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:49:58,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:58,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:49:58,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:59,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:59,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:59,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:59,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:59,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:59,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:49:59,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:59,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:59,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:59,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:59,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:59,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-29 09:49:59,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424489278] [2020-10-29 09:49:59,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:59,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:49:59,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142424918] [2020-10-29 09:49:59,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:49:59,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:59,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:49:59,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:49:59,894 INFO L87 Difference]: Start difference. First operand 348 states and 457 transitions. Second operand 16 states. [2020-10-29 09:50:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:01,818 INFO L93 Difference]: Finished difference Result 399 states and 519 transitions. [2020-10-29 09:50:01,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:50:01,819 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-10-29 09:50:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:01,820 INFO L225 Difference]: With dead ends: 399 [2020-10-29 09:50:01,820 INFO L226 Difference]: Without dead ends: 373 [2020-10-29 09:50:01,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:50:01,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-29 09:50:01,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 362. [2020-10-29 09:50:01,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-10-29 09:50:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 478 transitions. [2020-10-29 09:50:01,858 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 478 transitions. Word has length 34 [2020-10-29 09:50:01,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:01,858 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 478 transitions. [2020-10-29 09:50:01,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:50:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 478 transitions. [2020-10-29 09:50:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:50:01,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:01,860 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:01,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-29 09:50:01,860 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:01,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:01,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1470804772, now seen corresponding path program 4 times [2020-10-29 09:50:01,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:01,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61473428] [2020-10-29 09:50:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:01,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:01,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:02,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:02,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:02,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:06,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:06,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:50:06,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:50:06,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 09:50:06,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:06,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:06,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:50:06,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:50:06,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:50:06,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:07,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:07,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:07,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:07,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:07,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:07,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:07,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:07,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:07,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:07,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:07,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:07,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-29 09:50:07,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61473428] [2020-10-29 09:50:07,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:07,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:50:07,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160248624] [2020-10-29 09:50:07,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:50:07,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:07,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:50:07,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:50:07,072 INFO L87 Difference]: Start difference. First operand 362 states and 478 transitions. Second operand 10 states. [2020-10-29 09:50:08,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:08,069 INFO L93 Difference]: Finished difference Result 504 states and 700 transitions. [2020-10-29 09:50:08,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:50:08,070 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-29 09:50:08,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:08,073 INFO L225 Difference]: With dead ends: 504 [2020-10-29 09:50:08,073 INFO L226 Difference]: Without dead ends: 477 [2020-10-29 09:50:08,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:50:08,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2020-10-29 09:50:08,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 411. [2020-10-29 09:50:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-10-29 09:50:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 543 transitions. [2020-10-29 09:50:08,110 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 543 transitions. Word has length 34 [2020-10-29 09:50:08,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:08,110 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 543 transitions. [2020-10-29 09:50:08,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:50:08,110 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 543 transitions. [2020-10-29 09:50:08,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:50:08,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:08,111 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:08,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-29 09:50:08,112 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:08,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:08,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1737204636, now seen corresponding path program 16 times [2020-10-29 09:50:08,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:08,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020253299] [2020-10-29 09:50:08,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:08,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:08,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:08,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:10,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:10,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:50:10,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:50:10,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2350 [2020-10-29 09:50:10,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:10,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:10,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:50:10,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:10,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:50:10,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:10,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:10,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:10,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:10,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:10,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:10,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:10,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:10,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:10,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:10,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:10,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:10,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:10,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020253299] [2020-10-29 09:50:10,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:10,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:50:10,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478012107] [2020-10-29 09:50:10,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:50:10,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:10,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:50:10,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:50:10,994 INFO L87 Difference]: Start difference. First operand 411 states and 543 transitions. Second operand 21 states. [2020-10-29 09:50:15,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:15,147 INFO L93 Difference]: Finished difference Result 829 states and 1145 transitions. [2020-10-29 09:50:15,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:50:15,148 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2020-10-29 09:50:15,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:15,151 INFO L225 Difference]: With dead ends: 829 [2020-10-29 09:50:15,152 INFO L226 Difference]: Without dead ends: 744 [2020-10-29 09:50:15,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:50:15,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-10-29 09:50:15,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 426. [2020-10-29 09:50:15,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-10-29 09:50:15,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 564 transitions. [2020-10-29 09:50:15,207 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 564 transitions. Word has length 34 [2020-10-29 09:50:15,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:15,207 INFO L481 AbstractCegarLoop]: Abstraction has 426 states and 564 transitions. [2020-10-29 09:50:15,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:50:15,207 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 564 transitions. [2020-10-29 09:50:15,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:50:15,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:15,209 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:15,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-29 09:50:15,209 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:15,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:15,209 INFO L82 PathProgramCache]: Analyzing trace with hash -449333022, now seen corresponding path program 9 times [2020-10-29 09:50:15,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:15,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703328462] [2020-10-29 09:50:15,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:15,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:15,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:15,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:15,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:19,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:19,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:50:19,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:50:19,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4079 [2020-10-29 09:50:19,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:19,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:19,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:50:19,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:50:19,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:50:19,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:19,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:19,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:19,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:19,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:19,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:19,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:19,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:19,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:19,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:19,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:19,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:19,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-29 09:50:19,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703328462] [2020-10-29 09:50:19,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:19,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:50:19,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279021784] [2020-10-29 09:50:19,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:50:19,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:19,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:50:19,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:50:19,532 INFO L87 Difference]: Start difference. First operand 426 states and 564 transitions. Second operand 10 states. [2020-10-29 09:50:20,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:20,308 INFO L93 Difference]: Finished difference Result 804 states and 954 transitions. [2020-10-29 09:50:20,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:50:20,309 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-29 09:50:20,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:20,312 INFO L225 Difference]: With dead ends: 804 [2020-10-29 09:50:20,312 INFO L226 Difference]: Without dead ends: 761 [2020-10-29 09:50:20,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:50:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2020-10-29 09:50:20,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 435. [2020-10-29 09:50:20,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-10-29 09:50:20,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 572 transitions. [2020-10-29 09:50:20,358 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 572 transitions. Word has length 35 [2020-10-29 09:50:20,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:20,358 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 572 transitions. [2020-10-29 09:50:20,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:50:20,358 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 572 transitions. [2020-10-29 09:50:20,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:50:20,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:20,360 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:20,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-29 09:50:20,360 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:20,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:20,360 INFO L82 PathProgramCache]: Analyzing trace with hash 344606706, now seen corresponding path program 17 times [2020-10-29 09:50:20,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:20,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991446028] [2020-10-29 09:50:20,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:20,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:20,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:20,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:22,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:22,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:50:22,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:50:22,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1921 [2020-10-29 09:50:22,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:22,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:22,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:50:22,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:22,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:50:22,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:22,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:22,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:22,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:22,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:22,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:22,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:22,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:22,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:22,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:22,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:22,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:22,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:22,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991446028] [2020-10-29 09:50:22,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:22,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:50:22,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903125200] [2020-10-29 09:50:22,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:50:22,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:22,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:50:22,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:50:22,866 INFO L87 Difference]: Start difference. First operand 435 states and 572 transitions. Second operand 22 states. [2020-10-29 09:50:27,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:27,466 INFO L93 Difference]: Finished difference Result 914 states and 1257 transitions. [2020-10-29 09:50:27,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:50:27,467 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2020-10-29 09:50:27,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:27,470 INFO L225 Difference]: With dead ends: 914 [2020-10-29 09:50:27,470 INFO L226 Difference]: Without dead ends: 825 [2020-10-29 09:50:27,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:50:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2020-10-29 09:50:27,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 450. [2020-10-29 09:50:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-29 09:50:27,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 593 transitions. [2020-10-29 09:50:27,519 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 593 transitions. Word has length 35 [2020-10-29 09:50:27,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:27,519 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 593 transitions. [2020-10-29 09:50:27,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:50:27,519 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 593 transitions. [2020-10-29 09:50:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:50:27,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:27,520 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:27,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-29 09:50:27,521 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:27,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:27,521 INFO L82 PathProgramCache]: Analyzing trace with hash -712511229, now seen corresponding path program 10 times [2020-10-29 09:50:27,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:27,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333182839] [2020-10-29 09:50:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:27,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:27,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:27,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:29,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:32,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:32,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:50:32,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:50:32,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 09:50:32,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:32,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:32,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:50:32,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:32,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:50:32,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:33,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:33,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:33,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:33,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:33,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:33,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:33,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:33,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:33,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:33,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:33,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:33,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-29 09:50:33,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333182839] [2020-10-29 09:50:33,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:33,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:50:33,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211825590] [2020-10-29 09:50:33,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:50:33,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:33,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:50:33,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:50:33,309 INFO L87 Difference]: Start difference. First operand 450 states and 593 transitions. Second operand 16 states. [2020-10-29 09:50:34,006 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-10-29 09:50:34,231 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2020-10-29 09:50:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:37,789 INFO L93 Difference]: Finished difference Result 469 states and 612 transitions. [2020-10-29 09:50:37,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:50:37,790 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-29 09:50:37,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:37,791 INFO L225 Difference]: With dead ends: 469 [2020-10-29 09:50:37,792 INFO L226 Difference]: Without dead ends: 426 [2020-10-29 09:50:37,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:50:37,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-29 09:50:37,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 426. [2020-10-29 09:50:37,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-10-29 09:50:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 565 transitions. [2020-10-29 09:50:37,838 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 565 transitions. Word has length 36 [2020-10-29 09:50:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:37,838 INFO L481 AbstractCegarLoop]: Abstraction has 426 states and 565 transitions. [2020-10-29 09:50:37,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:50:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 565 transitions. [2020-10-29 09:50:37,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:50:37,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:37,840 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:37,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-29 09:50:37,840 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:37,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:37,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1190755570, now seen corresponding path program 11 times [2020-10-29 09:50:37,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:37,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024009069] [2020-10-29 09:50:37,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:37,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:37,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:37,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:38,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:40,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:42,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:42,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:50:42,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:50:42,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4984 [2020-10-29 09:50:42,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:42,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:42,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:50:42,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:42,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:50:42,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:43,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:43,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:43,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:43,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:43,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:43,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:43,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:43,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:43,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:43,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:43,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:43,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:50:43,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024009069] [2020-10-29 09:50:43,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:43,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:50:43,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277146481] [2020-10-29 09:50:43,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:50:43,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:43,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:50:43,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:50:43,280 INFO L87 Difference]: Start difference. First operand 426 states and 565 transitions. Second operand 18 states. [2020-10-29 09:50:45,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:45,117 INFO L93 Difference]: Finished difference Result 528 states and 688 transitions. [2020-10-29 09:50:45,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:50:45,118 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-10-29 09:50:45,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:45,121 INFO L225 Difference]: With dead ends: 528 [2020-10-29 09:50:45,121 INFO L226 Difference]: Without dead ends: 509 [2020-10-29 09:50:45,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:50:45,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2020-10-29 09:50:45,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 419. [2020-10-29 09:50:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2020-10-29 09:50:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 557 transitions. [2020-10-29 09:50:45,181 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 557 transitions. Word has length 36 [2020-10-29 09:50:45,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:45,181 INFO L481 AbstractCegarLoop]: Abstraction has 419 states and 557 transitions. [2020-10-29 09:50:45,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:50:45,182 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 557 transitions. [2020-10-29 09:50:45,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:50:45,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:45,183 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:45,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-29 09:50:45,183 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:45,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:45,183 INFO L82 PathProgramCache]: Analyzing trace with hash 456248868, now seen corresponding path program 18 times [2020-10-29 09:50:45,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:45,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942454975] [2020-10-29 09:50:45,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:45,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:45,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:45,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:46,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:46,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:50:46,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:50:46,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1565 [2020-10-29 09:50:46,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:46,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:46,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:50:46,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:46,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:50:46,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:47,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:47,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:47,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:47,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:47,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:47,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:47,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:47,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:47,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:47,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:47,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:47,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:47,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942454975] [2020-10-29 09:50:47,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:47,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:50:47,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986059333] [2020-10-29 09:50:47,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:50:47,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:47,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:50:47,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:50:47,401 INFO L87 Difference]: Start difference. First operand 419 states and 557 transitions. Second operand 23 states. [2020-10-29 09:50:52,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:52,449 INFO L93 Difference]: Finished difference Result 885 states and 1219 transitions. [2020-10-29 09:50:52,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:50:52,450 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 36 [2020-10-29 09:50:52,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:52,454 INFO L225 Difference]: With dead ends: 885 [2020-10-29 09:50:52,454 INFO L226 Difference]: Without dead ends: 796 [2020-10-29 09:50:52,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:50:52,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2020-10-29 09:50:52,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 434. [2020-10-29 09:50:52,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-10-29 09:50:52,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 578 transitions. [2020-10-29 09:50:52,506 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 578 transitions. Word has length 36 [2020-10-29 09:50:52,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:52,506 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 578 transitions. [2020-10-29 09:50:52,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:50:52,507 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 578 transitions. [2020-10-29 09:50:52,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:50:52,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:52,510 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:52,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-29 09:50:52,510 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:52,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:52,510 INFO L82 PathProgramCache]: Analyzing trace with hash -487685247, now seen corresponding path program 12 times [2020-10-29 09:50:52,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:52,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213857245] [2020-10-29 09:50:52,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:52,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:52,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:52,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:52,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:53,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:57,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:57,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:50:57,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:50:57,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 09:50:57,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:57,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:57,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:50:57,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:50:57,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:50:57,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:57,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:57,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:57,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:57,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:57,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:57,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:57,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:57,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:57,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:57,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:57,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:57,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-29 09:50:57,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213857245] [2020-10-29 09:50:57,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:57,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:50:57,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952244979] [2020-10-29 09:50:57,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:50:57,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:57,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:50:57,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:50:57,800 INFO L87 Difference]: Start difference. First operand 434 states and 578 transitions. Second operand 11 states. [2020-10-29 09:51:02,394 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-29 09:51:05,012 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-29 09:51:06,603 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-29 09:51:06,939 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-29 09:51:07,131 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-29 09:51:09,892 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 44 [2020-10-29 09:51:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:15,999 INFO L93 Difference]: Finished difference Result 579 states and 786 transitions. [2020-10-29 09:51:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:51:16,000 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-29 09:51:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:16,003 INFO L225 Difference]: With dead ends: 579 [2020-10-29 09:51:16,003 INFO L226 Difference]: Without dead ends: 565 [2020-10-29 09:51:16,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:51:16,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2020-10-29 09:51:16,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 450. [2020-10-29 09:51:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-29 09:51:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 594 transitions. [2020-10-29 09:51:16,046 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 594 transitions. Word has length 37 [2020-10-29 09:51:16,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:16,046 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 594 transitions. [2020-10-29 09:51:16,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:51:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 594 transitions. [2020-10-29 09:51:16,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:51:16,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:16,048 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:16,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-29 09:51:16,048 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:16,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:16,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1894988385, now seen corresponding path program 5 times [2020-10-29 09:51:16,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:16,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430560676] [2020-10-29 09:51:16,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:16,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:16,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:16,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:16,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:16,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:21,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:21,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:51:21,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:51:21,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 09:51:21,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:21,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:21,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:51:21,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:51:21,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:51:21,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:21,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:21,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:21,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:21,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:21,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:21,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:21,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:21,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:21,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:21,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:21,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:21,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-29 09:51:21,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430560676] [2020-10-29 09:51:21,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:21,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:51:21,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712101467] [2020-10-29 09:51:21,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:51:21,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:21,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:51:21,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:51:21,286 INFO L87 Difference]: Start difference. First operand 450 states and 594 transitions. Second operand 11 states. [2020-10-29 09:51:22,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:22,545 INFO L93 Difference]: Finished difference Result 600 states and 824 transitions. [2020-10-29 09:51:22,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:51:22,545 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-29 09:51:22,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:22,548 INFO L225 Difference]: With dead ends: 600 [2020-10-29 09:51:22,548 INFO L226 Difference]: Without dead ends: 578 [2020-10-29 09:51:22,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:51:22,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2020-10-29 09:51:22,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 499. [2020-10-29 09:51:22,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2020-10-29 09:51:22,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 667 transitions. [2020-10-29 09:51:22,592 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 667 transitions. Word has length 37 [2020-10-29 09:51:22,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:22,592 INFO L481 AbstractCegarLoop]: Abstraction has 499 states and 667 transitions. [2020-10-29 09:51:22,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:51:22,592 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 667 transitions. [2020-10-29 09:51:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:51:22,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:22,594 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:22,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-29 09:51:22,594 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:22,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:22,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1256567966, now seen corresponding path program 8 times [2020-10-29 09:51:22,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:22,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636200470] [2020-10-29 09:51:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:22,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:22,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:22,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:23,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:24,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:26,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:26,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:51:26,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:51:26,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4021 [2020-10-29 09:51:26,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:26,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:26,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:51:26,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:26,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:51:26,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:27,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:27,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:27,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:27,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:27,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:27,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:27,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:27,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:27,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:27,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:27,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:27,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:51:27,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636200470] [2020-10-29 09:51:27,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:27,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:51:27,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585101381] [2020-10-29 09:51:27,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:51:27,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:27,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:51:27,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:51:27,111 INFO L87 Difference]: Start difference. First operand 499 states and 667 transitions. Second operand 19 states. [2020-10-29 09:51:29,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:29,365 INFO L93 Difference]: Finished difference Result 700 states and 900 transitions. [2020-10-29 09:51:29,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:51:29,366 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-10-29 09:51:29,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:29,368 INFO L225 Difference]: With dead ends: 700 [2020-10-29 09:51:29,368 INFO L226 Difference]: Without dead ends: 681 [2020-10-29 09:51:29,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:51:29,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2020-10-29 09:51:29,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 499. [2020-10-29 09:51:29,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2020-10-29 09:51:29,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 666 transitions. [2020-10-29 09:51:29,411 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 666 transitions. Word has length 37 [2020-10-29 09:51:29,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:29,411 INFO L481 AbstractCegarLoop]: Abstraction has 499 states and 666 transitions. [2020-10-29 09:51:29,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:51:29,412 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 666 transitions. [2020-10-29 09:51:29,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:51:29,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:29,413 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:29,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-29 09:51:29,413 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:29,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:29,413 INFO L82 PathProgramCache]: Analyzing trace with hash -377811406, now seen corresponding path program 19 times [2020-10-29 09:51:29,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:29,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080751270] [2020-10-29 09:51:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:29,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:29,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:29,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:32,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:32,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:51:32,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:51:32,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3035 [2020-10-29 09:51:32,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:32,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:32,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:51:32,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:32,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:51:32,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:33,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:33,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:33,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:33,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:33,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:33,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:33,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:33,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:33,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:33,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:33,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:33,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:33,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080751270] [2020-10-29 09:51:33,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:33,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:51:33,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025328571] [2020-10-29 09:51:33,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:51:33,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:33,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:51:33,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:51:33,161 INFO L87 Difference]: Start difference. First operand 499 states and 666 transitions. Second operand 24 states. [2020-10-29 09:51:38,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:38,733 INFO L93 Difference]: Finished difference Result 1033 states and 1427 transitions. [2020-10-29 09:51:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:51:38,734 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 37 [2020-10-29 09:51:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:38,737 INFO L225 Difference]: With dead ends: 1033 [2020-10-29 09:51:38,737 INFO L226 Difference]: Without dead ends: 935 [2020-10-29 09:51:38,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:51:38,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2020-10-29 09:51:38,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 516. [2020-10-29 09:51:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-10-29 09:51:38,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 690 transitions. [2020-10-29 09:51:38,778 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 690 transitions. Word has length 37 [2020-10-29 09:51:38,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:38,778 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 690 transitions. [2020-10-29 09:51:38,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:51:38,779 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 690 transitions. [2020-10-29 09:51:38,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:51:38,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:38,780 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:38,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-29 09:51:38,780 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:38,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:38,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1503104590, now seen corresponding path program 13 times [2020-10-29 09:51:38,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:38,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718737034] [2020-10-29 09:51:38,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:38,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:38,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:39,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:40,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:41,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:43,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:43,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:51:43,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:51:43,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 09:51:43,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:43,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:43,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:51:43,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:51:43,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:51:43,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:44,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:44,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:44,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:44,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:44,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:44,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:44,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:44,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:44,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:44,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:44,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:44,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-29 09:51:44,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718737034] [2020-10-29 09:51:44,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:44,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:51:44,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096045804] [2020-10-29 09:51:44,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:51:44,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:44,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:51:44,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:51:44,153 INFO L87 Difference]: Start difference. First operand 516 states and 690 transitions. Second operand 14 states. [2020-10-29 09:51:45,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:45,942 INFO L93 Difference]: Finished difference Result 666 states and 840 transitions. [2020-10-29 09:51:45,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:51:45,943 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-29 09:51:45,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:45,947 INFO L225 Difference]: With dead ends: 666 [2020-10-29 09:51:45,947 INFO L226 Difference]: Without dead ends: 642 [2020-10-29 09:51:45,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:51:45,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2020-10-29 09:51:45,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 521. [2020-10-29 09:51:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-29 09:51:45,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 692 transitions. [2020-10-29 09:51:45,989 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 692 transitions. Word has length 38 [2020-10-29 09:51:45,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:45,989 INFO L481 AbstractCegarLoop]: Abstraction has 521 states and 692 transitions. [2020-10-29 09:51:45,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:51:45,989 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 692 transitions. [2020-10-29 09:51:45,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:51:45,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:45,990 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:45,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-29 09:51:45,991 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:45,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:45,991 INFO L82 PathProgramCache]: Analyzing trace with hash -817204526, now seen corresponding path program 14 times [2020-10-29 09:51:45,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:45,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582317366] [2020-10-29 09:51:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:46,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:46,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:46,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:46,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:46,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:46,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:51,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:51,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:51:51,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:51:51,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 09:51:51,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:51,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:51,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:51:51,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:51:51,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:51:51,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:51,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:51,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:51,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:51,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:51,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:51,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:51,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:51,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:51,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:51,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:51,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:51,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-29 09:51:51,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582317366] [2020-10-29 09:51:51,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:51,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:51:51,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524685912] [2020-10-29 09:51:51,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:51:51,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:51,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:51:51,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:51:51,301 INFO L87 Difference]: Start difference. First operand 521 states and 692 transitions. Second operand 12 states. [2020-10-29 09:51:52,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:52,725 INFO L93 Difference]: Finished difference Result 575 states and 762 transitions. [2020-10-29 09:51:52,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:51:52,725 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-29 09:51:52,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:52,727 INFO L225 Difference]: With dead ends: 575 [2020-10-29 09:51:52,727 INFO L226 Difference]: Without dead ends: 561 [2020-10-29 09:51:52,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:51:52,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2020-10-29 09:51:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 529. [2020-10-29 09:51:52,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2020-10-29 09:51:52,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 700 transitions. [2020-10-29 09:51:52,772 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 700 transitions. Word has length 38 [2020-10-29 09:51:52,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:52,772 INFO L481 AbstractCegarLoop]: Abstraction has 529 states and 700 transitions. [2020-10-29 09:51:52,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:51:52,772 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 700 transitions. [2020-10-29 09:51:52,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:51:52,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:52,773 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:52,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-29 09:51:52,774 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:52,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:52,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1565469106, now seen corresponding path program 6 times [2020-10-29 09:51:52,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:52,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581156488] [2020-10-29 09:51:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:52,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:52,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:53,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:53,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:53,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking...