/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:55:06,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:55:06,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:55:06,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:55:06,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:55:07,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:55:07,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:55:07,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:55:07,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:55:07,036 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:55:07,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:55:07,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:55:07,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:55:07,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:55:07,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:55:07,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:55:07,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:55:07,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:55:07,061 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:55:07,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:55:07,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:55:07,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:55:07,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:55:07,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:55:07,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:55:07,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:55:07,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:55:07,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:55:07,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:55:07,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:55:07,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:55:07,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:55:07,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:55:07,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:55:07,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:55:07,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:55:07,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:55:07,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:55:07,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:55:07,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:55:07,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:55:07,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 20:55:07,152 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:55:07,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:55:07,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:55:07,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:55:07,157 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:55:07,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:55:07,157 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:55:07,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:55:07,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:55:07,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:55:07,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:55:07,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:55:07,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:55:07,160 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:55:07,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:55:07,160 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:55:07,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:55:07,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:55:07,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:55:07,161 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:55:07,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:55:07,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:55:07,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:55:07,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:55:07,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:55:07,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:55:07,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:55:07,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:55:07,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:55:07,163 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:55:07,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:55:07,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:55:07,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:55:07,664 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:55:07,665 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:55:07,667 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label59.c [2020-10-26 20:55:07,741 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f4073fc0/7a3b9aaefd3c492e88b6c3260ccff6df/FLAGaf726df88 [2020-10-26 20:55:08,576 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:55:08,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label59.c [2020-10-26 20:55:08,594 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f4073fc0/7a3b9aaefd3c492e88b6c3260ccff6df/FLAGaf726df88 [2020-10-26 20:55:08,694 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f4073fc0/7a3b9aaefd3c492e88b6c3260ccff6df [2020-10-26 20:55:08,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:55:08,704 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:55:08,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:55:08,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:55:08,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:55:08,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:55:08" (1/1) ... [2020-10-26 20:55:08,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a66dee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:08, skipping insertion in model container [2020-10-26 20:55:08,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:55:08" (1/1) ... [2020-10-26 20:55:08,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:55:08,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:55:09,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:55:09,578 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:55:09,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:55:09,899 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:55:09,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09 WrapperNode [2020-10-26 20:55:09,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:55:09,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:55:09,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:55:09,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:55:09,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09" (1/1) ... [2020-10-26 20:55:09,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09" (1/1) ... [2020-10-26 20:55:09,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09" (1/1) ... [2020-10-26 20:55:09,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09" (1/1) ... [2020-10-26 20:55:10,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09" (1/1) ... [2020-10-26 20:55:10,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09" (1/1) ... [2020-10-26 20:55:10,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09" (1/1) ... [2020-10-26 20:55:10,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:55:10,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:55:10,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:55:10,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:55:10,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:55:10,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:55:10,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:55:10,216 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:55:10,216 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:55:10,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:55:10,218 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:55:10,218 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:55:10,218 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:55:10,218 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:55:10,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:55:10,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:55:10,220 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:55:10,220 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:55:10,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:55:10,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:55:10,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:55:10,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:55:10,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:55:10,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:55:12,673 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:55:12,673 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:55:12,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:55:12 BoogieIcfgContainer [2020-10-26 20:55:12,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:55:12,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:55:12,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:55:12,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:55:12,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:55:08" (1/3) ... [2020-10-26 20:55:12,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17568278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:55:12, skipping insertion in model container [2020-10-26 20:55:12,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09" (2/3) ... [2020-10-26 20:55:12,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17568278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:55:12, skipping insertion in model container [2020-10-26 20:55:12,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:55:12" (3/3) ... [2020-10-26 20:55:12,685 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label59.c [2020-10-26 20:55:12,698 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:55:12,704 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:55:12,718 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:55:12,749 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:55:12,749 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:55:12,749 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:55:12,749 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:55:12,749 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:55:12,750 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:55:12,750 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:55:12,750 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:55:12,775 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:55:12,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-26 20:55:12,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:12,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:55:12,795 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:12,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:12,801 INFO L82 PathProgramCache]: Analyzing trace with hash -531865988, now seen corresponding path program 1 times [2020-10-26 20:55:12,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:12,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255890716] [2020-10-26 20:55:12,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:13,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:14,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:17,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:17,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-26 20:55:17,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:55:17,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3944 [2020-10-26 20:55:17,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:17,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:55:17,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:55:17,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-26 20:55:17,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:55:17,713 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:55:17,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:55:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:17,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:17,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:17,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:55:17,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:17,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 20:55:17,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:17,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:17,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:55:17,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:55:17,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:55:17,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255890716] [2020-10-26 20:55:17,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:55:17,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 20:55:17,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332993516] [2020-10-26 20:55:17,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:55:17,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:55:17,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:55:17,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:55:17,913 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 4 states. [2020-10-26 20:55:18,281 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:55:21,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:55:21,772 INFO L93 Difference]: Finished difference Result 877 states and 1539 transitions. [2020-10-26 20:55:21,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:55:21,774 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 181 [2020-10-26 20:55:21,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:55:21,802 INFO L225 Difference]: With dead ends: 877 [2020-10-26 20:55:21,803 INFO L226 Difference]: Without dead ends: 484 [2020-10-26 20:55:21,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:55:21,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-10-26 20:55:21,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 466. [2020-10-26 20:55:21,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-26 20:55:21,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 751 transitions. [2020-10-26 20:55:21,920 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 751 transitions. Word has length 181 [2020-10-26 20:55:21,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:55:21,922 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 751 transitions. [2020-10-26 20:55:21,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:55:21,922 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 751 transitions. [2020-10-26 20:55:21,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-26 20:55:21,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:21,930 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:55:21,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:55:21,931 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:21,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:21,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1354687559, now seen corresponding path program 1 times [2020-10-26 20:55:21,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:21,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865952508] [2020-10-26 20:55:21,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:22,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:22,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:24,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:24,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-26 20:55:24,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:55:24,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2778 [2020-10-26 20:55:24,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:24,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:55:24,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:55:24,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:55:24,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:25,093 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:55:25,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:55:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:25,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:25,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:25,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:55:25,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:25,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 20:55:25,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:25,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:25,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:55:25,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:55:25,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:25,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:55:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:25,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:25,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:25,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:55:25,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:25,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 20:55:25,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:25,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:55:25,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:25,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:55:25,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:55:25,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865952508] [2020-10-26 20:55:25,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:55:25,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:55:25,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757688077] [2020-10-26 20:55:25,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:55:25,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:55:25,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:55:25,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:55:25,373 INFO L87 Difference]: Start difference. First operand 466 states and 751 transitions. Second operand 7 states. [2020-10-26 20:55:25,618 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:55:26,093 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:55:29,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:55:29,667 INFO L93 Difference]: Finished difference Result 1379 states and 2258 transitions. [2020-10-26 20:55:29,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:55:29,675 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 191 [2020-10-26 20:55:29,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:55:29,684 INFO L225 Difference]: With dead ends: 1379 [2020-10-26 20:55:29,684 INFO L226 Difference]: Without dead ends: 919 [2020-10-26 20:55:29,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:55:29,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2020-10-26 20:55:29,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 895. [2020-10-26 20:55:29,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895 states. [2020-10-26 20:55:29,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1258 transitions. [2020-10-26 20:55:29,789 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1258 transitions. Word has length 191 [2020-10-26 20:55:29,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:55:29,790 INFO L481 AbstractCegarLoop]: Abstraction has 895 states and 1258 transitions. [2020-10-26 20:55:29,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:55:29,790 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1258 transitions. [2020-10-26 20:55:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-26 20:55:29,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:29,802 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:55:29,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:55:29,803 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:29,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:29,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1071848709, now seen corresponding path program 1 times [2020-10-26 20:55:29,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:29,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383121170] [2020-10-26 20:55:29,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:29,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:30,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:32,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:32,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-26 20:55:32,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:55:32,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2453 [2020-10-26 20:55:32,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:32,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:55:32,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:55:32,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:55:32,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:32,623 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:55:32,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:55:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:32,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:32,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:32,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:55:32,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:32,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 20:55:32,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:32,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:32,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:55:32,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:55:32,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:32,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:55:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:32,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:32,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:32,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 20:55:32,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:32,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 20:55:32,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:32,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:55:32,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:32,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 20:55:32,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:55:33,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383121170] [2020-10-26 20:55:33,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:55:33,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:55:33,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032657356] [2020-10-26 20:55:33,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:55:33,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:55:33,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:55:33,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:55:33,036 INFO L87 Difference]: Start difference. First operand 895 states and 1258 transitions. Second operand 7 states. [2020-10-26 20:55:33,317 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:55:37,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:55:37,359 INFO L93 Difference]: Finished difference Result 2698 states and 3848 transitions. [2020-10-26 20:55:37,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:55:37,360 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 197 [2020-10-26 20:55:37,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:55:37,372 INFO L225 Difference]: With dead ends: 2698 [2020-10-26 20:55:37,372 INFO L226 Difference]: Without dead ends: 1809 [2020-10-26 20:55:37,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:55:37,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2020-10-26 20:55:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1793. [2020-10-26 20:55:37,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1793 states. [2020-10-26 20:55:37,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1793 states to 1793 states and 2531 transitions. [2020-10-26 20:55:37,462 INFO L78 Accepts]: Start accepts. Automaton has 1793 states and 2531 transitions. Word has length 197 [2020-10-26 20:55:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:55:37,462 INFO L481 AbstractCegarLoop]: Abstraction has 1793 states and 2531 transitions. [2020-10-26 20:55:37,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:55:37,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1793 states and 2531 transitions. [2020-10-26 20:55:37,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-26 20:55:37,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:37,469 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:55:37,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:55:37,470 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:37,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:37,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1967533051, now seen corresponding path program 1 times [2020-10-26 20:55:37,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:37,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542305118] [2020-10-26 20:55:37,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:37,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:38,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:39,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:39,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-26 20:55:39,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:55:39,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2257 [2020-10-26 20:55:39,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:39,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:55:39,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:55:39,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 20:55:39,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:40,099 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:55:40,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:55:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:40,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:40,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:40,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:55:40,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:40,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 20:55:40,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:40,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:40,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:55:40,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:55:40,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:40,292 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:55:40,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:55:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:40,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:40,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:40,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:55:40,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:40,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-26 20:55:40,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:40,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:55:40,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:40,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:55:40,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:55:40,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542305118] [2020-10-26 20:55:40,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:55:40,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:55:40,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243478795] [2020-10-26 20:55:40,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:55:40,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:55:40,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:55:40,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:55:40,593 INFO L87 Difference]: Start difference. First operand 1793 states and 2531 transitions. Second operand 7 states. [2020-10-26 20:55:40,861 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:55:42,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:55:42,902 INFO L93 Difference]: Finished difference Result 3549 states and 5068 transitions. [2020-10-26 20:55:42,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:55:42,902 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 198 [2020-10-26 20:55:42,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:55:42,914 INFO L225 Difference]: With dead ends: 3549 [2020-10-26 20:55:42,914 INFO L226 Difference]: Without dead ends: 1762 [2020-10-26 20:55:42,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:55:42,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2020-10-26 20:55:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1758. [2020-10-26 20:55:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1758 states. [2020-10-26 20:55:43,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 2416 transitions. [2020-10-26 20:55:43,004 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 2416 transitions. Word has length 198 [2020-10-26 20:55:43,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:55:43,004 INFO L481 AbstractCegarLoop]: Abstraction has 1758 states and 2416 transitions. [2020-10-26 20:55:43,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:55:43,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 2416 transitions. [2020-10-26 20:55:43,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-26 20:55:43,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:43,011 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:55:43,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:55:43,011 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:43,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:43,012 INFO L82 PathProgramCache]: Analyzing trace with hash -444415622, now seen corresponding path program 1 times [2020-10-26 20:55:43,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:43,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526962039] [2020-10-26 20:55:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:43,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:43,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:44,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:48,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:48,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-26 20:55:48,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:55:48,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 20:55:48,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:48,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:55:48,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:55:48,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:55:48,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:48,345 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:55:48,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:55:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:48,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:48,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:48,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:55:48,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:48,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:55:48,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:48,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:48,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:55:48,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:55:48,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:48,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:55:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:48,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:48,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:48,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 20:55:48,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:48,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 20:55:48,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:48,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:55:48,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:48,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 20:55:48,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:48,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-26 20:55:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:48,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:48,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:48,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:55:48,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:48,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:55:48,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:48,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:55:48,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-26 20:55:48,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:55:48,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:55:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:55:48,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526962039] [2020-10-26 20:55:48,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:55:48,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:55:48,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252615971] [2020-10-26 20:55:48,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:55:48,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:55:48,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:55:48,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:55:48,677 INFO L87 Difference]: Start difference. First operand 1758 states and 2416 transitions. Second operand 7 states. [2020-10-26 20:55:48,934 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:55:51,626 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:55:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:55:52,610 INFO L93 Difference]: Finished difference Result 5337 states and 7674 transitions. [2020-10-26 20:55:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:55:52,611 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 203 [2020-10-26 20:55:52,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:55:52,636 INFO L225 Difference]: With dead ends: 5337 [2020-10-26 20:55:52,637 INFO L226 Difference]: Without dead ends: 3585 [2020-10-26 20:55:52,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:55:52,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2020-10-26 20:55:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 3525. [2020-10-26 20:55:52,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3525 states. [2020-10-26 20:55:52,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3525 states to 3525 states and 4858 transitions. [2020-10-26 20:55:52,807 INFO L78 Accepts]: Start accepts. Automaton has 3525 states and 4858 transitions. Word has length 203 [2020-10-26 20:55:52,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:55:52,808 INFO L481 AbstractCegarLoop]: Abstraction has 3525 states and 4858 transitions. [2020-10-26 20:55:52,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:55:52,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3525 states and 4858 transitions. [2020-10-26 20:55:52,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-26 20:55:52,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:52,822 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:55:52,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:55:52,822 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:52,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:52,823 INFO L82 PathProgramCache]: Analyzing trace with hash -2020356608, now seen corresponding path program 1 times [2020-10-26 20:55:52,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:52,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711745532] [2020-10-26 20:55:52,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:52,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:53,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:53,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:55,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:55,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-26 20:55:55,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:55:55,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2098 [2020-10-26 20:55:55,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:55,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:55:55,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:55:55,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 191 [2020-10-26 20:55:55,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:55,362 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:55:55,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:55:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:55,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:55,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:55,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:55:55,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:55,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:55:55,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:55,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:55:55,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:55:55,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:55:55,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:55,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:55:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:55,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:55,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:55,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:55:55,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:55,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-26 20:55:55,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:55,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:55,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:55:55,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:55:55,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:55,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:55:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:55,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:55,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:55,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:55,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:55:55,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:55:55,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-26 20:55:55,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:55,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:55:55,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:55,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:55:55,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:55:55,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711745532] [2020-10-26 20:55:55,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:55:55,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:55:55,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627166361] [2020-10-26 20:55:55,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:55:55,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:55:55,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:55:55,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:55:55,856 INFO L87 Difference]: Start difference. First operand 3525 states and 4858 transitions. Second operand 7 states. [2020-10-26 20:55:56,336 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:55:57,890 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:56:00,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:00,324 INFO L93 Difference]: Finished difference Result 10350 states and 16813 transitions. [2020-10-26 20:56:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:56:00,325 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 212 [2020-10-26 20:56:00,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:00,390 INFO L225 Difference]: With dead ends: 10350 [2020-10-26 20:56:00,391 INFO L226 Difference]: Without dead ends: 6831 [2020-10-26 20:56:00,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:56:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6831 states. [2020-10-26 20:56:00,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6831 to 6587. [2020-10-26 20:56:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6587 states. [2020-10-26 20:56:00,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6587 states to 6587 states and 9119 transitions. [2020-10-26 20:56:00,738 INFO L78 Accepts]: Start accepts. Automaton has 6587 states and 9119 transitions. Word has length 212 [2020-10-26 20:56:00,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:00,739 INFO L481 AbstractCegarLoop]: Abstraction has 6587 states and 9119 transitions. [2020-10-26 20:56:00,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:56:00,739 INFO L276 IsEmpty]: Start isEmpty. Operand 6587 states and 9119 transitions. [2020-10-26 20:56:00,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-26 20:56:00,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:00,760 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:56:00,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:56:00,761 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:00,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:00,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1150069591, now seen corresponding path program 1 times [2020-10-26 20:56:00,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:00,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616232900] [2020-10-26 20:56:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:00,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:00,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:00,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:01,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:02,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:02,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:03,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:03,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:03,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-26 20:56:03,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 20:56:03,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2824 [2020-10-26 20:56:03,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:03,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:03,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:03,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:56:03,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:03,912 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:56:03,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:03,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:03,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:03,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:03,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:03,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:56:03,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:03,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:03,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:03,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:03,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:04,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:04,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:04,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:04,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:04,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:56:04,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:56:04,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 20:56:04,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:04,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:04,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:04,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 20:56:04,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:04,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:56:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:04,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:04,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:04,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:04,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:56:04,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:56:04,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:56:04,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:04,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:04,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 20:56:04,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:04,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:56:04,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616232900] [2020-10-26 20:56:04,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:56:04,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 20:56:04,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421332470] [2020-10-26 20:56:04,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:56:04,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:04,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:56:04,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:56:04,209 INFO L87 Difference]: Start difference. First operand 6587 states and 9119 transitions. Second operand 5 states. [2020-10-26 20:56:04,482 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:56:06,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:06,325 INFO L93 Difference]: Finished difference Result 13168 states and 18263 transitions. [2020-10-26 20:56:06,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:56:06,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 212 [2020-10-26 20:56:06,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:06,360 INFO L225 Difference]: With dead ends: 13168 [2020-10-26 20:56:06,360 INFO L226 Difference]: Without dead ends: 6587 [2020-10-26 20:56:06,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:56:06,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6587 states. [2020-10-26 20:56:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6587 to 6581. [2020-10-26 20:56:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6581 states. [2020-10-26 20:56:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6581 states to 6581 states and 9109 transitions. [2020-10-26 20:56:06,620 INFO L78 Accepts]: Start accepts. Automaton has 6581 states and 9109 transitions. Word has length 212 [2020-10-26 20:56:06,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:06,622 INFO L481 AbstractCegarLoop]: Abstraction has 6581 states and 9109 transitions. [2020-10-26 20:56:06,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:56:06,622 INFO L276 IsEmpty]: Start isEmpty. Operand 6581 states and 9109 transitions. [2020-10-26 20:56:06,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-26 20:56:06,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:06,644 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:56:06,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:56:06,644 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:06,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:06,645 INFO L82 PathProgramCache]: Analyzing trace with hash 677729945, now seen corresponding path program 1 times [2020-10-26 20:56:06,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:06,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894646278] [2020-10-26 20:56:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:06,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:07,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:08,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:08,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:08,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-26 20:56:08,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:56:08,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1822 [2020-10-26 20:56:08,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:08,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:56:08,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:56:08,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 191 [2020-10-26 20:56:08,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:08,859 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:56:08,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:08,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:08,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:08,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:08,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:08,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 20:56:08,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:08,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:56:08,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:08,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:56:08,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:08,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:09,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:09,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:09,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:56:09,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:09,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 20:56:09,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:09,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:09,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:09,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:56:09,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:09,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:56:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:09,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:09,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:09,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:09,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:56:09,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:56:09,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:56:09,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:09,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:09,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:09,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:56:09,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:56:09,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894646278] [2020-10-26 20:56:09,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:09,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:56:09,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942931347] [2020-10-26 20:56:09,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:56:09,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:09,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:56:09,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:56:09,158 INFO L87 Difference]: Start difference. First operand 6581 states and 9109 transitions. Second operand 6 states. [2020-10-26 20:56:09,610 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:56:12,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:12,923 INFO L93 Difference]: Finished difference Result 18746 states and 27372 transitions. [2020-10-26 20:56:12,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:56:12,924 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 212 [2020-10-26 20:56:12,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:12,982 INFO L225 Difference]: With dead ends: 18746 [2020-10-26 20:56:12,982 INFO L226 Difference]: Without dead ends: 12171 [2020-10-26 20:56:13,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:56:13,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12171 states. [2020-10-26 20:56:13,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12171 to 11032. [2020-10-26 20:56:13,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11032 states. [2020-10-26 20:56:13,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11032 states to 11032 states and 15223 transitions. [2020-10-26 20:56:13,477 INFO L78 Accepts]: Start accepts. Automaton has 11032 states and 15223 transitions. Word has length 212 [2020-10-26 20:56:13,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:13,478 INFO L481 AbstractCegarLoop]: Abstraction has 11032 states and 15223 transitions. [2020-10-26 20:56:13,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:56:13,478 INFO L276 IsEmpty]: Start isEmpty. Operand 11032 states and 15223 transitions. [2020-10-26 20:56:13,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-26 20:56:13,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:13,509 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:56:13,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:56:13,509 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:13,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:13,510 INFO L82 PathProgramCache]: Analyzing trace with hash -2105883208, now seen corresponding path program 1 times [2020-10-26 20:56:13,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:13,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274572946] [2020-10-26 20:56:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:13,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:14,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:15,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:15,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-26 20:56:15,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:56:15,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2059 [2020-10-26 20:56:15,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:15,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:56:15,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:15,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 20:56:15,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:56:15,971 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:56:15,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:15,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:16,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:16,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:16,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:16,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:56:16,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:16,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:16,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:16,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:16,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:16,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:16,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:16,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:16,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:56:16,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:16,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-26 20:56:16,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:16,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:16,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:16,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 20:56:16,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:56:16,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274572946] [2020-10-26 20:56:16,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:56:16,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:56:16,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347646128] [2020-10-26 20:56:16,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:56:16,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:16,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:56:16,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:56:16,391 INFO L87 Difference]: Start difference. First operand 11032 states and 15223 transitions. Second operand 7 states. [2020-10-26 20:56:16,734 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:56:18,392 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:56:20,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:20,232 INFO L93 Difference]: Finished difference Result 29029 states and 41182 transitions. [2020-10-26 20:56:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:56:20,233 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 219 [2020-10-26 20:56:20,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:20,314 INFO L225 Difference]: With dead ends: 29029 [2020-10-26 20:56:20,314 INFO L226 Difference]: Without dead ends: 18003 [2020-10-26 20:56:20,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:56:20,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18003 states. [2020-10-26 20:56:21,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18003 to 16861. [2020-10-26 20:56:21,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16861 states. [2020-10-26 20:56:21,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16861 states to 16861 states and 22813 transitions. [2020-10-26 20:56:21,135 INFO L78 Accepts]: Start accepts. Automaton has 16861 states and 22813 transitions. Word has length 219 [2020-10-26 20:56:21,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:21,136 INFO L481 AbstractCegarLoop]: Abstraction has 16861 states and 22813 transitions. [2020-10-26 20:56:21,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:56:21,136 INFO L276 IsEmpty]: Start isEmpty. Operand 16861 states and 22813 transitions. [2020-10-26 20:56:21,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-26 20:56:21,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:21,182 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:56:21,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:56:21,183 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:21,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:21,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1641564699, now seen corresponding path program 1 times [2020-10-26 20:56:21,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:21,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981283033] [2020-10-26 20:56:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:21,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:21,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:22,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:25,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:26,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:26,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-26 20:56:26,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:56:26,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-26 20:56:26,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:26,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:56:26,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:26,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-26 20:56:26,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:26,549 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:56:26,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:26,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:26,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:26,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:26,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:26,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:56:26,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:26,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:26,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:26,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:26,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:26,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:26,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:26,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:26,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:26,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:56:26,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:56:26,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-26 20:56:26,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:26,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:26,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:26,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:56:26,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:26,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:56:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:26,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:26,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:26,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:56:26,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:26,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 20:56:26,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:26,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:26,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:26,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:56:26,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:26,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 20:56:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:26,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:26,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:26,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 20:56:26,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:26,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 20:56:26,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:26,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:56:26,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 20:56:26,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:56:26,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 61 proven. 27 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:56:27,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981283033] [2020-10-26 20:56:27,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:27,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:56:27,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600461178] [2020-10-26 20:56:27,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:56:27,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:27,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:56:27,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:56:27,132 INFO L87 Difference]: Start difference. First operand 16861 states and 22813 transitions. Second operand 8 states. [2020-10-26 20:56:27,395 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:56:29,435 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:56:31,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:31,073 INFO L93 Difference]: Finished difference Result 38302 states and 53981 transitions. [2020-10-26 20:56:31,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:56:31,073 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 239 [2020-10-26 20:56:31,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:31,172 INFO L225 Difference]: With dead ends: 38302 [2020-10-26 20:56:31,172 INFO L226 Difference]: Without dead ends: 23150 [2020-10-26 20:56:31,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:56:31,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23150 states. [2020-10-26 20:56:31,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23150 to 22980. [2020-10-26 20:56:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22980 states. [2020-10-26 20:56:32,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22980 states to 22980 states and 31526 transitions. [2020-10-26 20:56:32,014 INFO L78 Accepts]: Start accepts. Automaton has 22980 states and 31526 transitions. Word has length 239 [2020-10-26 20:56:32,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:32,014 INFO L481 AbstractCegarLoop]: Abstraction has 22980 states and 31526 transitions. [2020-10-26 20:56:32,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:56:32,014 INFO L276 IsEmpty]: Start isEmpty. Operand 22980 states and 31526 transitions. [2020-10-26 20:56:32,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-26 20:56:32,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:32,076 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:56:32,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:56:32,077 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:32,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:32,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1049257367, now seen corresponding path program 1 times [2020-10-26 20:56:32,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:32,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135218121] [2020-10-26 20:56:32,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:32,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:32,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:33,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:33,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:35,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:37,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:37,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-26 20:56:37,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:56:37,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 20:56:37,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:37,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:56:37,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:37,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 20:56:37,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:37,397 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:56:37,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:37,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:37,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:37,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:37,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:37,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:56:37,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:37,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:37,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:37,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:37,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:37,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:37,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:37,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:37,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:56:37,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:37,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 20:56:37,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:37,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:37,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:37,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:56:37,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:37,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:56:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:37,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:37,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:37,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 20:56:37,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:37,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 20:56:37,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:37,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:37,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:37,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 20:56:37,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:37,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 20:56:37,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:37,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:37,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:37,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 20:56:37,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:37,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 20:56:37,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:37,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:56:37,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 20:56:37,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:56:37,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 56 proven. 29 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-26 20:56:37,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135218121] [2020-10-26 20:56:37,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:37,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:56:37,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631123716] [2020-10-26 20:56:37,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:56:37,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:37,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:56:37,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:56:37,809 INFO L87 Difference]: Start difference. First operand 22980 states and 31526 transitions. Second operand 7 states. [2020-10-26 20:56:38,060 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:56:41,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:41,640 INFO L93 Difference]: Finished difference Result 63126 states and 91803 transitions. [2020-10-26 20:56:41,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:56:41,641 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 241 [2020-10-26 20:56:41,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:41,843 INFO L225 Difference]: With dead ends: 63126 [2020-10-26 20:56:41,844 INFO L226 Difference]: Without dead ends: 42285 [2020-10-26 20:56:41,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:56:41,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42285 states. [2020-10-26 20:56:43,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42285 to 41844. [2020-10-26 20:56:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41844 states. [2020-10-26 20:56:43,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41844 states to 41844 states and 58040 transitions. [2020-10-26 20:56:43,426 INFO L78 Accepts]: Start accepts. Automaton has 41844 states and 58040 transitions. Word has length 241 [2020-10-26 20:56:43,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:43,427 INFO L481 AbstractCegarLoop]: Abstraction has 41844 states and 58040 transitions. [2020-10-26 20:56:43,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:56:43,427 INFO L276 IsEmpty]: Start isEmpty. Operand 41844 states and 58040 transitions. [2020-10-26 20:56:43,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-26 20:56:43,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:43,474 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:56:43,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:56:43,474 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:43,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:43,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1050916327, now seen corresponding path program 1 times [2020-10-26 20:56:43,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:43,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187377569] [2020-10-26 20:56:43,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:43,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:44,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:45,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:45,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-26 20:56:45,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:56:45,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2246 [2020-10-26 20:56:45,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:45,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:56:45,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:45,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 20:56:45,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:46,042 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:56:46,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:46,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:46,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:46,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:46,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:46,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:56:46,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:46,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:46,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:46,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:46,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:46,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:46,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:46,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:46,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 20:56:46,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:46,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-26 20:56:46,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:46,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:46,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:46,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-26 20:56:46,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:56:46,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187377569] [2020-10-26 20:56:46,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:56:46,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:56:46,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016306858] [2020-10-26 20:56:46,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:56:46,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:46,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:56:46,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:56:46,631 INFO L87 Difference]: Start difference. First operand 41844 states and 58040 transitions. Second operand 7 states. [2020-10-26 20:56:46,917 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:56:49,737 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:56:50,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:50,872 INFO L93 Difference]: Finished difference Result 82073 states and 116100 transitions. [2020-10-26 20:56:50,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:56:50,872 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 239 [2020-10-26 20:56:50,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:51,026 INFO L225 Difference]: With dead ends: 82073 [2020-10-26 20:56:51,027 INFO L226 Difference]: Without dead ends: 42368 [2020-10-26 20:56:51,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:56:51,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42368 states. [2020-10-26 20:56:52,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42368 to 40239. [2020-10-26 20:56:52,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40239 states. [2020-10-26 20:56:52,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40239 states to 40239 states and 53019 transitions. [2020-10-26 20:56:52,528 INFO L78 Accepts]: Start accepts. Automaton has 40239 states and 53019 transitions. Word has length 239 [2020-10-26 20:56:52,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:52,529 INFO L481 AbstractCegarLoop]: Abstraction has 40239 states and 53019 transitions. [2020-10-26 20:56:52,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:56:52,529 INFO L276 IsEmpty]: Start isEmpty. Operand 40239 states and 53019 transitions. [2020-10-26 20:56:52,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-26 20:56:52,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:52,559 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:56:52,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:56:52,559 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:52,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:52,560 INFO L82 PathProgramCache]: Analyzing trace with hash 119771489, now seen corresponding path program 1 times [2020-10-26 20:56:52,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:52,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647347826] [2020-10-26 20:56:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:52,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:52,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:53,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:54,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:55,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:57,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:57,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-10-26 20:56:57,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:56:57,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 20:56:57,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:57,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:57,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:56:57,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:56:57,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:57,900 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:56:57,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:57,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:57,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:57,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:57,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:57,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:56:57,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:57,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:56:57,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:57,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:56:57,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:58,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:58,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:58,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:58,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:56:58,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:58,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:56:58,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:58,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:58,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:58,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:56:58,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:58,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:56:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:58,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:58,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:58,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:56:58,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:58,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:56:58,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:58,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:58,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:58,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:56:58,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:58,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 20:56:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:58,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:58,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:58,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:56:58,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:58,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:56:58,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:58,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:56:58,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-26 20:56:58,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:56:58,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:58,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 20:56:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:58,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:58,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:58,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 20:56:58,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:58,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:56:58,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:58,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:56:58,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 20:56:58,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:56:58,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 72 proven. 12 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-26 20:56:58,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647347826] [2020-10-26 20:56:58,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:58,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:56:58,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696768887] [2020-10-26 20:56:58,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:56:58,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:58,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:56:58,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:56:58,268 INFO L87 Difference]: Start difference. First operand 40239 states and 53019 transitions. Second operand 7 states. [2020-10-26 20:56:58,716 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:56:59,990 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:57:02,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:57:02,583 INFO L93 Difference]: Finished difference Result 85441 states and 114548 transitions. [2020-10-26 20:57:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:57:02,584 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 254 [2020-10-26 20:57:02,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:57:02,735 INFO L225 Difference]: With dead ends: 85441 [2020-10-26 20:57:02,735 INFO L226 Difference]: Without dead ends: 46487 [2020-10-26 20:57:02,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:57:02,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46487 states. [2020-10-26 20:57:04,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46487 to 42163. [2020-10-26 20:57:04,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42163 states. [2020-10-26 20:57:04,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42163 states to 42163 states and 51239 transitions. [2020-10-26 20:57:04,199 INFO L78 Accepts]: Start accepts. Automaton has 42163 states and 51239 transitions. Word has length 254 [2020-10-26 20:57:04,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:57:04,199 INFO L481 AbstractCegarLoop]: Abstraction has 42163 states and 51239 transitions. [2020-10-26 20:57:04,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:57:04,199 INFO L276 IsEmpty]: Start isEmpty. Operand 42163 states and 51239 transitions. [2020-10-26 20:57:04,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-10-26 20:57:04,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:57:04,226 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:57:04,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:57:04,226 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:57:04,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:57:04,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1713063577, now seen corresponding path program 1 times [2020-10-26 20:57:04,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:57:04,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852179551] [2020-10-26 20:57:04,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:57:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:04,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:05,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:07,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:07,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-26 20:57:07,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:57:07,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3070 [2020-10-26 20:57:07,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:07,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 20:57:07,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:57:07,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 238 [2020-10-26 20:57:07,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:08,517 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 89 [2020-10-26 20:57:08,791 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-10-26 20:57:09,014 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2020-10-26 20:57:09,233 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-10-26 20:57:09,423 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-10-26 20:57:09,840 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:57:09,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:57:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:09,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:09,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:09,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:57:09,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:09,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:57:09,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:09,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:57:09,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:09,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:57:09,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:10,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:57:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:10,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:10,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:10,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 20:57:10,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:10,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-26 20:57:10,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:57:10,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:10,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-26 20:57:10,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:10,899 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-26 20:57:11,250 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92 [2020-10-26 20:57:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:57:12,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852179551] [2020-10-26 20:57:12,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:57:12,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 20:57:12,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255454616] [2020-10-26 20:57:12,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 20:57:12,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:12,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 20:57:12,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:57:12,924 INFO L87 Difference]: Start difference. First operand 42163 states and 51239 transitions. Second operand 16 states. [2020-10-26 20:57:13,377 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-26 20:57:13,751 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2020-10-26 20:57:16,672 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 87 [2020-10-26 20:57:17,143 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 65 [2020-10-26 20:57:17,731 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 90 [2020-10-26 20:57:19,129 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 271 DAG size of output: 208 [2020-10-26 20:57:20,591 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 291 DAG size of output: 228 [2020-10-26 20:57:22,877 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 288 DAG size of output: 225 [2020-10-26 20:57:25,111 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 289 DAG size of output: 222 [2020-10-26 20:57:28,516 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 289 DAG size of output: 219 [2020-10-26 20:57:31,156 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 290 DAG size of output: 216 [2020-10-26 20:57:33,069 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 290 DAG size of output: 211 [2020-10-26 20:57:34,925 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 175 [2020-10-26 20:57:37,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:57:37,824 INFO L93 Difference]: Finished difference Result 82855 states and 101417 transitions. [2020-10-26 20:57:37,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 20:57:37,825 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 287 [2020-10-26 20:57:37,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:57:37,931 INFO L225 Difference]: With dead ends: 82855 [2020-10-26 20:57:37,931 INFO L226 Difference]: Without dead ends: 41326 [2020-10-26 20:57:37,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2020-10-26 20:57:38,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41326 states. [2020-10-26 20:57:38,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41326 to 41064. [2020-10-26 20:57:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41064 states. [2020-10-26 20:57:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41064 states to 41064 states and 50076 transitions. [2020-10-26 20:57:39,031 INFO L78 Accepts]: Start accepts. Automaton has 41064 states and 50076 transitions. Word has length 287 [2020-10-26 20:57:39,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:57:39,032 INFO L481 AbstractCegarLoop]: Abstraction has 41064 states and 50076 transitions. [2020-10-26 20:57:39,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 20:57:39,032 INFO L276 IsEmpty]: Start isEmpty. Operand 41064 states and 50076 transitions. [2020-10-26 20:57:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-26 20:57:39,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:57:39,055 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:57:39,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:57:39,055 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:57:39,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:57:39,056 INFO L82 PathProgramCache]: Analyzing trace with hash -486550151, now seen corresponding path program 1 times [2020-10-26 20:57:39,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:57:39,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840757672] [2020-10-26 20:57:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:57:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:39,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:39,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:40,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:42,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:44,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:44,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 351 [2020-10-26 20:57:44,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:57:44,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-26 20:57:44,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:57:44,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:57:44,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 20:57:44,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:44,455 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:57:44,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:57:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:44,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:44,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:44,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:57:44,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:44,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:57:44,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:44,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:57:44,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:44,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:57:44,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:44,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:57:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:44,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:44,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:44,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:57:44,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:44,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-26 20:57:44,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:44,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:44,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:44,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:57:44,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:44,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:57:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:44,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:44,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:44,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:57:44,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:44,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:57:44,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:44,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:44,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:44,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:57:44,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:45,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-26 20:57:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:45,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:45,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:45,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:57:45,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:45,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:57:45,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:45,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:45,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-26 20:57:45,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:45,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:45,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 20:57:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:45,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:45,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:45,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 20:57:45,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:45,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:57:45,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:45,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:45,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 20:57:45,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:45,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 147 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 20:57:45,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840757672] [2020-10-26 20:57:45,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:57:45,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:57:45,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877109254] [2020-10-26 20:57:45,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:57:45,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:45,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:57:45,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:57:45,371 INFO L87 Difference]: Start difference. First operand 41064 states and 50076 transitions. Second operand 8 states. [2020-10-26 20:57:45,649 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:57:47,072 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:57:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:57:49,468 INFO L93 Difference]: Finished difference Result 88164 states and 107799 transitions. [2020-10-26 20:57:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:57:49,469 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 333 [2020-10-26 20:57:49,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:57:49,565 INFO L225 Difference]: With dead ends: 88164 [2020-10-26 20:57:49,565 INFO L226 Difference]: Without dead ends: 48524 [2020-10-26 20:57:49,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:57:49,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48524 states. [2020-10-26 20:57:51,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48524 to 48302. [2020-10-26 20:57:51,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48302 states. [2020-10-26 20:57:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48302 states to 48302 states and 58911 transitions. [2020-10-26 20:57:51,493 INFO L78 Accepts]: Start accepts. Automaton has 48302 states and 58911 transitions. Word has length 333 [2020-10-26 20:57:51,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:57:51,494 INFO L481 AbstractCegarLoop]: Abstraction has 48302 states and 58911 transitions. [2020-10-26 20:57:51,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:57:51,494 INFO L276 IsEmpty]: Start isEmpty. Operand 48302 states and 58911 transitions. [2020-10-26 20:57:51,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-10-26 20:57:51,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:57:51,568 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:57:51,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 20:57:51,569 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:57:51,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:57:51,569 INFO L82 PathProgramCache]: Analyzing trace with hash 616371346, now seen corresponding path program 1 times [2020-10-26 20:57:51,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:57:51,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197142876] [2020-10-26 20:57:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:57:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:51,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:51,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:52,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:52,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:56,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:56,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 360 [2020-10-26 20:57:56,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:57:56,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 20:57:56,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:56,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 20:57:56,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:57:56,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 20:57:56,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:56,935 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:57:56,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:57:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:56,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:56,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:56,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:57:56,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:56,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:57:56,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:56,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:57:56,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:56,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:57:56,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:57,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:57:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:57,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:57,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:57,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:57:57,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:57,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 20:57:57,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:57,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:57:57,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:57,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:57:57,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:57,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:57:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:57,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:57,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:57,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:57:57,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:57,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-26 20:57:57,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:57,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:57,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:57,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:57:57,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:57,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 20:57:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:57,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:57,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:57,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 20:57:57,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:57,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-26 20:57:57,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:57,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:57,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-26 20:57:57,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:57,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:57,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-26 20:57:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:57,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:57,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:57,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:57:57,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:57,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-26 20:57:57,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:57,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:57,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-26 20:57:57,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:57,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:57,799 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 160 proven. 77 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 20:57:57,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197142876] [2020-10-26 20:57:57,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:57:57,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 20:57:57,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102151291] [2020-10-26 20:57:57,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:57:57,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:57,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:57:57,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:57:57,802 INFO L87 Difference]: Start difference. First operand 48302 states and 58911 transitions. Second operand 10 states. [2020-10-26 20:57:58,092 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:57:58,795 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 162 [2020-10-26 20:58:00,744 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 161 [2020-10-26 20:58:03,685 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 159 [2020-10-26 20:58:04,303 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 162 [2020-10-26 20:58:05,703 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:58:07,840 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:58:10,607 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:58:13,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:58:13,523 INFO L93 Difference]: Finished difference Result 161945 states and 219764 transitions. [2020-10-26 20:58:13,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 20:58:13,524 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 342 [2020-10-26 20:58:13,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:58:14,024 INFO L225 Difference]: With dead ends: 161945 [2020-10-26 20:58:14,024 INFO L226 Difference]: Without dead ends: 113864 [2020-10-26 20:58:14,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2020-10-26 20:58:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113864 states. [2020-10-26 20:58:17,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113864 to 110066. [2020-10-26 20:58:17,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110066 states. [2020-10-26 20:58:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110066 states to 110066 states and 137726 transitions. [2020-10-26 20:58:17,781 INFO L78 Accepts]: Start accepts. Automaton has 110066 states and 137726 transitions. Word has length 342 [2020-10-26 20:58:17,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:58:17,782 INFO L481 AbstractCegarLoop]: Abstraction has 110066 states and 137726 transitions. [2020-10-26 20:58:17,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:58:17,782 INFO L276 IsEmpty]: Start isEmpty. Operand 110066 states and 137726 transitions. [2020-10-26 20:58:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-26 20:58:17,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:58:17,826 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:58:17,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 20:58:17,826 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:58:17,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:58:17,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1365063273, now seen corresponding path program 1 times [2020-10-26 20:58:17,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:58:17,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202543228] [2020-10-26 20:58:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:58:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:18,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:18,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:19,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:22,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:22,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 367 [2020-10-26 20:58:22,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:58:22,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 20:58:22,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:22,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:58:22,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:58:22,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:58:22,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:23,454 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:58:23,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:58:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:23,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:23,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:23,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:58:23,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:23,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:58:23,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:23,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:58:23,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:58:23,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:58:23,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:23,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:58:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:23,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:23,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:24,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:24,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-26 20:58:24,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:58:24,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 903 [2020-10-26 20:58:24,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:24,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:58:24,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:58:24,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-26 20:58:24,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:25,474 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 142 [2020-10-26 20:58:25,992 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 146 [2020-10-26 20:58:26,590 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 161 [2020-10-26 20:58:27,252 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 168 [2020-10-26 20:58:27,574 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:58:28,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-10-26 20:58:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:28,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:28,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:28,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:58:28,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:28,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:58:28,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:28,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:58:28,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-26 20:58:28,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:58:28,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0