/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/Problem11_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 22:34:22,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 22:34:22,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 22:34:22,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 22:34:22,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 22:34:22,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 22:34:22,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 22:34:22,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 22:34:22,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 22:34:22,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 22:34:22,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 22:34:22,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 22:34:22,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 22:34:22,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 22:34:22,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 22:34:22,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 22:34:22,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 22:34:22,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 22:34:22,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 22:34:22,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 22:34:22,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 22:34:22,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 22:34:22,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 22:34:22,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 22:34:22,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 22:34:22,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 22:34:22,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 22:34:22,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 22:34:22,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 22:34:22,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 22:34:22,354 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 22:34:22,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 22:34:22,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 22:34:22,359 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 22:34:22,360 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 22:34:22,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 22:34:22,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 22:34:22,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 22:34:22,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 22:34:22,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 22:34:22,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 22:34:22,373 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 22:34:22,424 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 22:34:22,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 22:34:22,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 22:34:22,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 22:34:22,430 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 22:34:22,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 22:34:22,431 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 22:34:22,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 22:34:22,431 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 22:34:22,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 22:34:22,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 22:34:22,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 22:34:22,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 22:34:22,434 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 22:34:22,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 22:34:22,434 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 22:34:22,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 22:34:22,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 22:34:22,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 22:34:22,435 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 22:34:22,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 22:34:22,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:34:22,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 22:34:22,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 22:34:22,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 22:34:22,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 22:34:22,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 22:34:22,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 22:34:22,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 22:34:22,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 22:34:22,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 22:34:22,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 22:34:22,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 22:34:22,933 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 22:34:22,933 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 22:34:22,934 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label03.c [2020-10-26 22:34:23,032 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cdb96fd0/1dc8f5690eec49fbbf46ac71fe3b9b2d/FLAGad12fcd83 [2020-10-26 22:34:23,918 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 22:34:23,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem11_label03.c [2020-10-26 22:34:23,936 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cdb96fd0/1dc8f5690eec49fbbf46ac71fe3b9b2d/FLAGad12fcd83 [2020-10-26 22:34:24,078 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cdb96fd0/1dc8f5690eec49fbbf46ac71fe3b9b2d [2020-10-26 22:34:24,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 22:34:24,092 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 22:34:24,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 22:34:24,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 22:34:24,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 22:34:24,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:34:24" (1/1) ... [2020-10-26 22:34:24,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d3aad05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:34:24, skipping insertion in model container [2020-10-26 22:34:24,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:34:24" (1/1) ... [2020-10-26 22:34:24,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 22:34:24,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 22:34:24,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:34:25,009 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 22:34:25,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:34:25,231 INFO L208 MainTranslator]: Completed translation [2020-10-26 22:34:25,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:34:25 WrapperNode [2020-10-26 22:34:25,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 22:34:25,235 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 22:34:25,235 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 22:34:25,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 22:34:25,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:34:25" (1/1) ... [2020-10-26 22:34:25,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:34:25" (1/1) ... [2020-10-26 22:34:25,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:34:25" (1/1) ... [2020-10-26 22:34:25,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:34:25" (1/1) ... [2020-10-26 22:34:25,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:34:25" (1/1) ... [2020-10-26 22:34:25,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:34:25" (1/1) ... [2020-10-26 22:34:25,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:34:25" (1/1) ... [2020-10-26 22:34:25,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 22:34:25,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 22:34:25,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 22:34:25,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 22:34:25,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:34:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:34:25,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 22:34:25,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 22:34:25,515 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 22:34:25,516 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 22:34:25,516 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 22:34:25,517 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 22:34:25,517 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 22:34:25,517 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 22:34:25,517 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 22:34:25,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 22:34:25,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 22:34:25,519 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 22:34:25,519 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 22:34:25,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 22:34:25,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 22:34:25,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 22:34:25,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 22:34:25,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 22:34:25,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 22:34:27,741 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 22:34:27,741 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 22:34:27,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:34:27 BoogieIcfgContainer [2020-10-26 22:34:27,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 22:34:27,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 22:34:27,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 22:34:27,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 22:34:27,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:34:24" (1/3) ... [2020-10-26 22:34:27,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2333ecaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:34:27, skipping insertion in model container [2020-10-26 22:34:27,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:34:25" (2/3) ... [2020-10-26 22:34:27,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2333ecaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:34:27, skipping insertion in model container [2020-10-26 22:34:27,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:34:27" (3/3) ... [2020-10-26 22:34:27,754 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label03.c [2020-10-26 22:34:27,767 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 22:34:27,773 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 22:34:27,787 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 22:34:27,819 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 22:34:27,819 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 22:34:27,819 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 22:34:27,819 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 22:34:27,819 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 22:34:27,820 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 22:34:27,820 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 22:34:27,820 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 22:34:27,845 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states. [2020-10-26 22:34:27,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 22:34:27,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:34:27,854 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] [2020-10-26 22:34:27,855 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:34:27,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:34:27,862 INFO L82 PathProgramCache]: Analyzing trace with hash 164451990, now seen corresponding path program 1 times [2020-10-26 22:34:27,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:34:27,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326574017] [2020-10-26 22:34:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:34:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:34:28,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:28,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:34:28,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 22:34:28,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:34:28,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 585 [2020-10-26 22:34:28,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:34:28,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:34:28,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:34:28,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 22:34:28,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:34:28,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:34:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:34:28,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:28,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:34:28,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:34:28,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:34:28,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 22:34:28,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:34:28,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:34:28,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:34:28,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:34:28,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:34:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:34:28,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326574017] [2020-10-26 22:34:28,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:34:28,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 22:34:28,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720840553] [2020-10-26 22:34:28,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:34:28,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:34:29,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:34:29,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:34:29,008 INFO L87 Difference]: Start difference. First operand 296 states. Second operand 5 states. [2020-10-26 22:34:29,171 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 22:34:33,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:34:33,832 INFO L93 Difference]: Finished difference Result 1004 states and 1802 transitions. [2020-10-26 22:34:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:34:33,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-10-26 22:34:33,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:34:33,855 INFO L225 Difference]: With dead ends: 1004 [2020-10-26 22:34:33,855 INFO L226 Difference]: Without dead ends: 640 [2020-10-26 22:34:33,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:34:33,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2020-10-26 22:34:33,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 622. [2020-10-26 22:34:33,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2020-10-26 22:34:33,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 904 transitions. [2020-10-26 22:34:33,979 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 904 transitions. Word has length 37 [2020-10-26 22:34:33,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:34:33,980 INFO L481 AbstractCegarLoop]: Abstraction has 622 states and 904 transitions. [2020-10-26 22:34:33,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:34:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 904 transitions. [2020-10-26 22:34:33,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-26 22:34:33,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:34:33,991 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:34:33,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 22:34:33,991 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:34:33,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:34:33,994 INFO L82 PathProgramCache]: Analyzing trace with hash 552761815, now seen corresponding path program 1 times [2020-10-26 22:34:33,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:34:33,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058776410] [2020-10-26 22:34:33,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:34:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:34:34,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:34,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:35,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:34:35,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 22:34:35,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:34:35,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1621 [2020-10-26 22:34:35,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:34:35,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:34:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:34:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 22:34:35,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:34:35,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:34:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:34:35,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:35,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:34:35,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:34:35,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:34:35,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 22:34:35,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:34:35,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:34:35,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:34:35,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:34:35,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:34:35,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:34:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:34:35,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:36,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:34:36,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 22:34:36,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:34:36,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-26 22:34:36,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:34:36,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:34:36,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:34:36,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 22:34:36,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:34:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:34:36,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058776410] [2020-10-26 22:34:36,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:34:36,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:34:36,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591331346] [2020-10-26 22:34:36,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:34:36,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:34:36,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:34:36,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:34:36,303 INFO L87 Difference]: Start difference. First operand 622 states and 904 transitions. Second operand 7 states. [2020-10-26 22:34:39,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:34:39,422 INFO L93 Difference]: Finished difference Result 1873 states and 2810 transitions. [2020-10-26 22:34:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:34:39,423 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2020-10-26 22:34:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:34:39,436 INFO L225 Difference]: With dead ends: 1873 [2020-10-26 22:34:39,436 INFO L226 Difference]: Without dead ends: 1257 [2020-10-26 22:34:39,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:34:39,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2020-10-26 22:34:39,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1225. [2020-10-26 22:34:39,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1225 states. [2020-10-26 22:34:39,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1643 transitions. [2020-10-26 22:34:39,505 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1643 transitions. Word has length 107 [2020-10-26 22:34:39,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:34:39,506 INFO L481 AbstractCegarLoop]: Abstraction has 1225 states and 1643 transitions. [2020-10-26 22:34:39,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:34:39,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1643 transitions. [2020-10-26 22:34:39,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 22:34:39,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:34:39,509 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:34:39,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 22:34:39,510 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:34:39,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:34:39,510 INFO L82 PathProgramCache]: Analyzing trace with hash -987055189, now seen corresponding path program 1 times [2020-10-26 22:34:39,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:34:39,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185631612] [2020-10-26 22:34:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:34:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:34:39,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:39,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:40,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:41,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:34:41,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-26 22:34:41,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:34:41,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1722 [2020-10-26 22:34:41,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:34:41,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:34:41,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:34:41,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 22:34:41,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:34:41,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:34:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:34:41,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:41,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:34:41,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:34:41,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:34:41,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 22:34:41,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:34:41,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:34:41,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:34:41,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:34:41,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:34:41,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:34:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:34:41,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:41,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:34:41,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:34:41,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:34:41,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-26 22:34:41,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:34:41,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:34:41,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:34:41,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:34:41,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:34:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:34:41,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185631612] [2020-10-26 22:34:41,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:34:41,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:34:41,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378083770] [2020-10-26 22:34:41,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:34:41,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:34:41,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:34:41,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:34:41,776 INFO L87 Difference]: Start difference. First operand 1225 states and 1643 transitions. Second operand 7 states. [2020-10-26 22:34:45,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:34:45,665 INFO L93 Difference]: Finished difference Result 3489 states and 4836 transitions. [2020-10-26 22:34:45,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:34:45,666 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 117 [2020-10-26 22:34:45,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:34:45,684 INFO L225 Difference]: With dead ends: 3489 [2020-10-26 22:34:45,684 INFO L226 Difference]: Without dead ends: 2270 [2020-10-26 22:34:45,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:34:45,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2020-10-26 22:34:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2223. [2020-10-26 22:34:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-10-26 22:34:45,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 2862 transitions. [2020-10-26 22:34:45,768 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 2862 transitions. Word has length 117 [2020-10-26 22:34:45,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:34:45,769 INFO L481 AbstractCegarLoop]: Abstraction has 2223 states and 2862 transitions. [2020-10-26 22:34:45,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:34:45,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 2862 transitions. [2020-10-26 22:34:45,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-26 22:34:45,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:34:45,773 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:34:45,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 22:34:45,773 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:34:45,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:34:45,774 INFO L82 PathProgramCache]: Analyzing trace with hash -143308254, now seen corresponding path program 1 times [2020-10-26 22:34:45,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:34:45,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317489495] [2020-10-26 22:34:45,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:34:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:34:45,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:46,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:34:46,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-26 22:34:46,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:34:46,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-10-26 22:34:46,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:34:46,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:34:46,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:34:46,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 22:34:46,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:34:46,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:34:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:34:46,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:46,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:34:46,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:34:46,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:34:46,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 22:34:46,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:34:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:34:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:34:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:34:46,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:34:46,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:34:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:34:46,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:46,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:34:46,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:34:46,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:34:46,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-26 22:34:46,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:34:46,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:34:46,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:34:46,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:34:46,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:34:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:34:46,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317489495] [2020-10-26 22:34:46,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:34:46,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:34:46,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144566362] [2020-10-26 22:34:46,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:34:46,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:34:46,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:34:46,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:34:46,777 INFO L87 Difference]: Start difference. First operand 2223 states and 2862 transitions. Second operand 5 states. [2020-10-26 22:34:49,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:34:49,651 INFO L93 Difference]: Finished difference Result 5040 states and 6688 transitions. [2020-10-26 22:34:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:34:49,652 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2020-10-26 22:34:49,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:34:49,675 INFO L225 Difference]: With dead ends: 5040 [2020-10-26 22:34:49,675 INFO L226 Difference]: Without dead ends: 3011 [2020-10-26 22:34:49,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:34:49,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3011 states. [2020-10-26 22:34:49,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3011 to 2995. [2020-10-26 22:34:49,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2995 states. [2020-10-26 22:34:49,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2995 states to 2995 states and 3836 transitions. [2020-10-26 22:34:49,778 INFO L78 Accepts]: Start accepts. Automaton has 2995 states and 3836 transitions. Word has length 168 [2020-10-26 22:34:49,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:34:49,779 INFO L481 AbstractCegarLoop]: Abstraction has 2995 states and 3836 transitions. [2020-10-26 22:34:49,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:34:49,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2995 states and 3836 transitions. [2020-10-26 22:34:49,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-26 22:34:49,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:34:49,785 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 22:34:49,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 22:34:49,785 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:34:49,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:34:49,786 INFO L82 PathProgramCache]: Analyzing trace with hash 2140054474, now seen corresponding path program 1 times [2020-10-26 22:34:49,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:34:49,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511116478] [2020-10-26 22:34:49,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:34:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:34:49,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:49,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:50,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:52,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:34:52,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-26 22:34:52,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:34:52,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2636 [2020-10-26 22:34:52,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:34:52,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:34:52,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-26 22:34:52,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 22:34:52,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:34:52,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:34:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:34:52,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:52,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:34:52,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:34:52,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:34:52,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:34:52,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:34:52,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:34:52,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:34:52,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:34:52,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:34:52,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:34:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:34:52,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:52,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:34:52,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:34:52,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:34:52,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-26 22:34:52,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:34:52,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:34:52,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:34:52,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:34:52,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:34:52,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:34:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:34:52,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:53,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:34:53,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:34:53,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:34:53,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-26 22:34:53,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:34:53,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:34:53,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:34:53,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:34:53,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:34:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:34:53,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511116478] [2020-10-26 22:34:53,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:34:53,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:34:53,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306979371] [2020-10-26 22:34:53,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:34:53,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:34:53,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:34:53,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:34:53,328 INFO L87 Difference]: Start difference. First operand 2995 states and 3836 transitions. Second operand 7 states. [2020-10-26 22:34:56,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:34:56,578 INFO L93 Difference]: Finished difference Result 6236 states and 8101 transitions. [2020-10-26 22:34:56,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:34:56,583 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 227 [2020-10-26 22:34:56,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:34:56,603 INFO L225 Difference]: With dead ends: 6236 [2020-10-26 22:34:56,604 INFO L226 Difference]: Without dead ends: 3435 [2020-10-26 22:34:56,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:34:56,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2020-10-26 22:34:56,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3217. [2020-10-26 22:34:56,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3217 states. [2020-10-26 22:34:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3217 states to 3217 states and 4142 transitions. [2020-10-26 22:34:56,702 INFO L78 Accepts]: Start accepts. Automaton has 3217 states and 4142 transitions. Word has length 227 [2020-10-26 22:34:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:34:56,702 INFO L481 AbstractCegarLoop]: Abstraction has 3217 states and 4142 transitions. [2020-10-26 22:34:56,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:34:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand 3217 states and 4142 transitions. [2020-10-26 22:34:56,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-26 22:34:56,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:34:56,708 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:34:56,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 22:34:56,708 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:34:56,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:34:56,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1288035294, now seen corresponding path program 1 times [2020-10-26 22:34:56,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:34:56,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801744380] [2020-10-26 22:34:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:34:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:34:56,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:57,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:57,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:34:57,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-26 22:34:57,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:34:57,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 625 [2020-10-26 22:34:57,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:34:57,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:34:57,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-10-26 22:34:57,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 22:34:57,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:34:57,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:34:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:34:57,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:57,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:34:57,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:34:57,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:34:57,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:34:57,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:34:57,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:34:57,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:34:57,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:34:57,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:34:57,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:34:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:34:57,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:57,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:34:57,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:34:57,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:34:57,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 22:34:57,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:34:57,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:34:57,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:34:57,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:34:57,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:34:57,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:34:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:34:57,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:34:57,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:34:57,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 22:34:57,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:34:57,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-26 22:34:57,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:34:57,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:34:57,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:34:57,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 22:34:57,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:34:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-26 22:34:57,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801744380] [2020-10-26 22:34:57,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:34:57,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:34:57,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282644942] [2020-10-26 22:34:57,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:34:57,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:34:57,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:34:57,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:34:57,972 INFO L87 Difference]: Start difference. First operand 3217 states and 4142 transitions. Second operand 5 states. [2020-10-26 22:35:00,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:35:00,091 INFO L93 Difference]: Finished difference Result 6455 states and 8359 transitions. [2020-10-26 22:35:00,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:35:00,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 237 [2020-10-26 22:35:00,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:35:00,115 INFO L225 Difference]: With dead ends: 6455 [2020-10-26 22:35:00,115 INFO L226 Difference]: Without dead ends: 3229 [2020-10-26 22:35:00,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:35:00,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2020-10-26 22:35:00,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 3217. [2020-10-26 22:35:00,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3217 states. [2020-10-26 22:35:00,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3217 states to 3217 states and 4134 transitions. [2020-10-26 22:35:00,262 INFO L78 Accepts]: Start accepts. Automaton has 3217 states and 4134 transitions. Word has length 237 [2020-10-26 22:35:00,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:35:00,263 INFO L481 AbstractCegarLoop]: Abstraction has 3217 states and 4134 transitions. [2020-10-26 22:35:00,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:35:00,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3217 states and 4134 transitions. [2020-10-26 22:35:00,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-26 22:35:00,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:35:00,271 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:35:00,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 22:35:00,272 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:35:00,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:35:00,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1681714018, now seen corresponding path program 1 times [2020-10-26 22:35:00,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:35:00,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038995789] [2020-10-26 22:35:00,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:35:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:00,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:00,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:01,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:02,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:02,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-26 22:35:02,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:35:02,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2124 [2020-10-26 22:35:02,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:02,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:35:02,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 136 [2020-10-26 22:35:02,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 22:35:02,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:02,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:35:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:02,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:02,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:02,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:35:02,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:02,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:35:02,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:02,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:35:02,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:02,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:35:02,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:02,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:35:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:02,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:02,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:02,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:35:02,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:02,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-26 22:35:02,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:02,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:35:02,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:02,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-26 22:35:02,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:02,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:35:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:02,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:03,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:03,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:35:03,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:03,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-26 22:35:03,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:03,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:35:03,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:35:03,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:35:03,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:35:03,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038995789] [2020-10-26 22:35:03,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:35:03,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:35:03,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363930192] [2020-10-26 22:35:03,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:35:03,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:35:03,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:35:03,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:35:03,270 INFO L87 Difference]: Start difference. First operand 3217 states and 4134 transitions. Second operand 7 states. [2020-10-26 22:35:07,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:35:07,763 INFO L93 Difference]: Finished difference Result 8222 states and 10889 transitions. [2020-10-26 22:35:07,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:35:07,764 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 237 [2020-10-26 22:35:07,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:35:07,789 INFO L225 Difference]: With dead ends: 8222 [2020-10-26 22:35:07,790 INFO L226 Difference]: Without dead ends: 5011 [2020-10-26 22:35:07,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:35:07,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2020-10-26 22:35:07,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 4599. [2020-10-26 22:35:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4599 states. [2020-10-26 22:35:07,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4599 states to 4599 states and 5734 transitions. [2020-10-26 22:35:07,944 INFO L78 Accepts]: Start accepts. Automaton has 4599 states and 5734 transitions. Word has length 237 [2020-10-26 22:35:07,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:35:07,945 INFO L481 AbstractCegarLoop]: Abstraction has 4599 states and 5734 transitions. [2020-10-26 22:35:07,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:35:07,945 INFO L276 IsEmpty]: Start isEmpty. Operand 4599 states and 5734 transitions. [2020-10-26 22:35:07,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-26 22:35:07,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:35:07,951 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:35:07,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 22:35:07,952 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:35:07,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:35:07,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1476658187, now seen corresponding path program 1 times [2020-10-26 22:35:07,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:35:07,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723188471] [2020-10-26 22:35:07,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:35:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:08,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:08,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:08,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:09,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:10,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:11,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:13,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:13,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-26 22:35:13,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 22:35:13,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 22:35:13,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:13,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:35:13,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:35:13,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-26 22:35:13,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:13,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:35:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:13,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:13,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:13,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:35:13,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:13,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 22:35:13,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:13,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:35:13,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:13,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:35:13,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:13,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:35:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:13,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:13,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:13,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:13,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:35:13,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:35:13,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-26 22:35:13,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:13,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:35:13,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:35:13,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-26 22:35:13,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:13,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:35:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:13,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:13,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:13,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:35:13,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:13,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 22:35:13,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:13,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:35:13,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-26 22:35:13,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:35:13,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 58 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:35:13,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723188471] [2020-10-26 22:35:13,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:35:13,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:35:13,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344951740] [2020-10-26 22:35:13,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:35:13,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:35:13,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:35:13,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:35:13,919 INFO L87 Difference]: Start difference. First operand 4599 states and 5734 transitions. Second operand 7 states. [2020-10-26 22:35:17,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:35:17,448 INFO L93 Difference]: Finished difference Result 11419 states and 15186 transitions. [2020-10-26 22:35:17,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:35:17,449 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 248 [2020-10-26 22:35:17,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:35:17,499 INFO L225 Difference]: With dead ends: 11419 [2020-10-26 22:35:17,499 INFO L226 Difference]: Without dead ends: 6826 [2020-10-26 22:35:17,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:35:17,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6826 states. [2020-10-26 22:35:17,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6826 to 6353. [2020-10-26 22:35:17,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6353 states. [2020-10-26 22:35:17,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6353 states to 6353 states and 7819 transitions. [2020-10-26 22:35:17,721 INFO L78 Accepts]: Start accepts. Automaton has 6353 states and 7819 transitions. Word has length 248 [2020-10-26 22:35:17,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:35:17,722 INFO L481 AbstractCegarLoop]: Abstraction has 6353 states and 7819 transitions. [2020-10-26 22:35:17,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:35:17,722 INFO L276 IsEmpty]: Start isEmpty. Operand 6353 states and 7819 transitions. [2020-10-26 22:35:17,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-26 22:35:17,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:35:17,729 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:35:17,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 22:35:17,729 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:35:17,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:35:17,730 INFO L82 PathProgramCache]: Analyzing trace with hash -314796590, now seen corresponding path program 1 times [2020-10-26 22:35:17,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:35:17,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225900897] [2020-10-26 22:35:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:35:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:17,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:18,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:18,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:18,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-26 22:35:18,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:35:18,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-10-26 22:35:18,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:18,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:35:18,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 239 [2020-10-26 22:35:18,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 22:35:18,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:18,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:35:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:18,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:18,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:18,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:35:18,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:18,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:35:18,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:18,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:35:18,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:18,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:35:18,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:18,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:35:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:18,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:18,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:18,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:35:18,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:18,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 22:35:18,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:18,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:35:18,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:18,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:35:18,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:19,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:35:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:19,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:19,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:19,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 22:35:19,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:19,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-26 22:35:19,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:19,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:35:19,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:19,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 22:35:19,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-26 22:35:19,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225900897] [2020-10-26 22:35:19,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:35:19,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:35:19,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310871033] [2020-10-26 22:35:19,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:35:19,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:35:19,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:35:19,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:35:19,335 INFO L87 Difference]: Start difference. First operand 6353 states and 7819 transitions. Second operand 5 states. [2020-10-26 22:35:20,393 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-26 22:35:21,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:35:21,343 INFO L93 Difference]: Finished difference Result 12730 states and 15704 transitions. [2020-10-26 22:35:21,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:35:21,344 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 264 [2020-10-26 22:35:21,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:35:21,368 INFO L225 Difference]: With dead ends: 12730 [2020-10-26 22:35:21,368 INFO L226 Difference]: Without dead ends: 6363 [2020-10-26 22:35:21,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:35:21,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6363 states. [2020-10-26 22:35:21,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6363 to 6351. [2020-10-26 22:35:21,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6351 states. [2020-10-26 22:35:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6351 states to 6351 states and 7794 transitions. [2020-10-26 22:35:21,576 INFO L78 Accepts]: Start accepts. Automaton has 6351 states and 7794 transitions. Word has length 264 [2020-10-26 22:35:21,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:35:21,576 INFO L481 AbstractCegarLoop]: Abstraction has 6351 states and 7794 transitions. [2020-10-26 22:35:21,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:35:21,577 INFO L276 IsEmpty]: Start isEmpty. Operand 6351 states and 7794 transitions. [2020-10-26 22:35:21,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-26 22:35:21,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:35:21,583 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:35:21,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 22:35:21,584 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:35:21,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:35:21,585 INFO L82 PathProgramCache]: Analyzing trace with hash 147949516, now seen corresponding path program 1 times [2020-10-26 22:35:21,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:35:21,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055922245] [2020-10-26 22:35:21,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:35:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:21,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:21,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:22,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:23,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:23,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:23,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-26 22:35:23,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:35:23,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2097 [2020-10-26 22:35:23,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:23,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:35:23,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-26 22:35:23,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-26 22:35:23,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:23,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:35:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:23,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:23,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:23,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:35:23,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:23,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 22:35:23,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:23,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:35:23,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:23,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:35:23,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:23,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:35:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:24,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:24,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:24,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:35:24,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:24,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-26 22:35:24,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:24,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:35:24,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:24,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:35:24,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:35:24,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:35:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:24,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:24,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:24,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:24,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:35:24,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:35:24,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-26 22:35:24,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:24,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:35:24,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:35:24,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:35:24,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 104 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:35:24,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055922245] [2020-10-26 22:35:24,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:35:24,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:35:24,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364841579] [2020-10-26 22:35:24,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:35:24,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:35:24,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:35:24,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:35:24,751 INFO L87 Difference]: Start difference. First operand 6351 states and 7794 transitions. Second operand 6 states. [2020-10-26 22:35:27,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:35:27,885 INFO L93 Difference]: Finished difference Result 14639 states and 18381 transitions. [2020-10-26 22:35:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:35:27,886 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 264 [2020-10-26 22:35:27,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:35:27,911 INFO L225 Difference]: With dead ends: 14639 [2020-10-26 22:35:27,911 INFO L226 Difference]: Without dead ends: 8294 [2020-10-26 22:35:27,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:35:27,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8294 states. [2020-10-26 22:35:28,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8294 to 8271. [2020-10-26 22:35:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8271 states. [2020-10-26 22:35:28,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8271 states to 8271 states and 10123 transitions. [2020-10-26 22:35:28,162 INFO L78 Accepts]: Start accepts. Automaton has 8271 states and 10123 transitions. Word has length 264 [2020-10-26 22:35:28,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:35:28,163 INFO L481 AbstractCegarLoop]: Abstraction has 8271 states and 10123 transitions. [2020-10-26 22:35:28,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:35:28,163 INFO L276 IsEmpty]: Start isEmpty. Operand 8271 states and 10123 transitions. [2020-10-26 22:35:28,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-26 22:35:28,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:35:28,170 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:35:28,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 22:35:28,171 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:35:28,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:35:28,171 INFO L82 PathProgramCache]: Analyzing trace with hash -669725144, now seen corresponding path program 1 times [2020-10-26 22:35:28,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:35:28,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899458313] [2020-10-26 22:35:28,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:35:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:28,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:28,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:28,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:28,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 297 [2020-10-26 22:35:28,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:35:28,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 583 [2020-10-26 22:35:28,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:28,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:35:28,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 258 [2020-10-26 22:35:28,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 22:35:28,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:28,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:35:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:28,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:28,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:28,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:35:28,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:28,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:35:28,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:28,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:35:28,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:28,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:35:28,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:29,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:35:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:29,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:29,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:29,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:35:29,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:29,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 22:35:29,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:29,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:35:29,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:29,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:35:29,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:29,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:35:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:29,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:29,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:29,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-26 22:35:29,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:29,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-26 22:35:29,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:29,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:35:29,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:29,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:35:29,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-10-26 22:35:29,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899458313] [2020-10-26 22:35:29,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:35:29,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:35:29,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413745705] [2020-10-26 22:35:29,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:35:29,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:35:29,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:35:29,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:35:29,523 INFO L87 Difference]: Start difference. First operand 8271 states and 10123 transitions. Second operand 5 states. [2020-10-26 22:35:30,585 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-26 22:35:31,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:35:31,512 INFO L93 Difference]: Finished difference Result 16562 states and 20290 transitions. [2020-10-26 22:35:31,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:35:31,513 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 283 [2020-10-26 22:35:31,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:35:31,538 INFO L225 Difference]: With dead ends: 16562 [2020-10-26 22:35:31,539 INFO L226 Difference]: Without dead ends: 8283 [2020-10-26 22:35:31,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:35:31,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8283 states. [2020-10-26 22:35:31,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8283 to 8269. [2020-10-26 22:35:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8269 states. [2020-10-26 22:35:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8269 states to 8269 states and 10104 transitions. [2020-10-26 22:35:31,735 INFO L78 Accepts]: Start accepts. Automaton has 8269 states and 10104 transitions. Word has length 283 [2020-10-26 22:35:31,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:35:31,736 INFO L481 AbstractCegarLoop]: Abstraction has 8269 states and 10104 transitions. [2020-10-26 22:35:31,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:35:31,736 INFO L276 IsEmpty]: Start isEmpty. Operand 8269 states and 10104 transitions. [2020-10-26 22:35:31,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-26 22:35:31,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:35:31,745 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:35:31,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 22:35:31,746 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:35:31,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:35:31,747 INFO L82 PathProgramCache]: Analyzing trace with hash -387084012, now seen corresponding path program 1 times [2020-10-26 22:35:31,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:35:31,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138722348] [2020-10-26 22:35:31,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:35:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:31,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:32,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:32,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:32,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-26 22:35:32,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:35:32,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 820 [2020-10-26 22:35:32,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:32,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:35:32,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 282 [2020-10-26 22:35:32,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 22:35:32,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:32,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:35:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:32,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:32,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:32,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:35:32,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:32,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:35:32,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:32,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:35:32,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:32,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:35:32,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:32,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:35:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:32,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:32,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:32,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:35:32,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:32,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 22:35:32,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:32,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:35:32,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:32,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:35:32,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:32,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:35:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:33,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:33,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:33,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-26 22:35:33,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:33,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-26 22:35:33,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:33,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:35:33,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:33,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-26 22:35:33,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-26 22:35:33,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138722348] [2020-10-26 22:35:33,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:35:33,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:35:33,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300984207] [2020-10-26 22:35:33,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:35:33,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:35:33,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:35:33,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:35:33,262 INFO L87 Difference]: Start difference. First operand 8269 states and 10104 transitions. Second operand 5 states. [2020-10-26 22:35:34,366 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-26 22:35:35,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:35:35,298 INFO L93 Difference]: Finished difference Result 16563 states and 20281 transitions. [2020-10-26 22:35:35,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:35:35,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 307 [2020-10-26 22:35:35,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:35:35,324 INFO L225 Difference]: With dead ends: 16563 [2020-10-26 22:35:35,324 INFO L226 Difference]: Without dead ends: 8283 [2020-10-26 22:35:35,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:35:35,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8283 states. [2020-10-26 22:35:35,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8283 to 8269. [2020-10-26 22:35:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8269 states. [2020-10-26 22:35:35,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8269 states to 8269 states and 10096 transitions. [2020-10-26 22:35:35,516 INFO L78 Accepts]: Start accepts. Automaton has 8269 states and 10096 transitions. Word has length 307 [2020-10-26 22:35:35,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:35:35,517 INFO L481 AbstractCegarLoop]: Abstraction has 8269 states and 10096 transitions. [2020-10-26 22:35:35,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:35:35,517 INFO L276 IsEmpty]: Start isEmpty. Operand 8269 states and 10096 transitions. [2020-10-26 22:35:35,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-10-26 22:35:35,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:35:35,531 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:35:35,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 22:35:35,531 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:35:35,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:35:35,532 INFO L82 PathProgramCache]: Analyzing trace with hash -2145256835, now seen corresponding path program 1 times [2020-10-26 22:35:35,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:35:35,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155676387] [2020-10-26 22:35:35,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:35:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:35,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:35,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:36,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:36,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:37,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:40,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:40,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 374 [2020-10-26 22:35:40,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:35:40,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 22:35:40,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:40,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 22:35:40,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:35:40,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 317 [2020-10-26 22:35:40,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:40,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:35:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:40,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:40,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:40,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:35:40,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:40,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 22:35:40,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:40,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:35:40,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:40,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:35:40,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:40,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:35:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:40,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:41,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:41,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:35:41,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:41,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-26 22:35:41,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:41,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:35:41,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:35:41,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-26 22:35:41,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:41,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:35:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:41,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:41,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:41,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 22:35:41,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:41,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-26 22:35:41,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:41,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:35:41,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:35:41,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 22:35:41,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:41,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2020-10-26 22:35:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:41,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:41,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:41,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:41,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:35:41,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:35:41,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-26 22:35:41,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:41,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:35:41,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:35:41,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:35:41,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 96 proven. 239 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 22:35:42,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155676387] [2020-10-26 22:35:42,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:35:42,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 22:35:42,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686751170] [2020-10-26 22:35:42,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 22:35:42,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:35:42,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 22:35:42,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:35:42,063 INFO L87 Difference]: Start difference. First operand 8269 states and 10096 transitions. Second operand 11 states. [2020-10-26 22:35:49,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:35:49,190 INFO L93 Difference]: Finished difference Result 23021 states and 28513 transitions. [2020-10-26 22:35:49,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 22:35:49,191 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 358 [2020-10-26 22:35:49,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:35:49,237 INFO L225 Difference]: With dead ends: 23021 [2020-10-26 22:35:49,237 INFO L226 Difference]: Without dead ends: 14370 [2020-10-26 22:35:49,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2020-10-26 22:35:49,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14370 states. [2020-10-26 22:35:49,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14370 to 14226. [2020-10-26 22:35:49,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14226 states. [2020-10-26 22:35:49,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14226 states to 14226 states and 16954 transitions. [2020-10-26 22:35:49,563 INFO L78 Accepts]: Start accepts. Automaton has 14226 states and 16954 transitions. Word has length 358 [2020-10-26 22:35:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:35:49,563 INFO L481 AbstractCegarLoop]: Abstraction has 14226 states and 16954 transitions. [2020-10-26 22:35:49,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 22:35:49,564 INFO L276 IsEmpty]: Start isEmpty. Operand 14226 states and 16954 transitions. [2020-10-26 22:35:49,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-10-26 22:35:49,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:35:49,580 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 22:35:49,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 22:35:49,580 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:35:49,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:35:49,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1773622065, now seen corresponding path program 1 times [2020-10-26 22:35:49,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:35:49,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215552902] [2020-10-26 22:35:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:35:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:49,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:49,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:49,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:51,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:51,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:52,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:52,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 376 [2020-10-26 22:35:52,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:35:52,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2604 [2020-10-26 22:35:52,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:52,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:35:52,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 255 [2020-10-26 22:35:52,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 22:35:52,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:52,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:35:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:52,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:52,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:52,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:35:52,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:52,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 22:35:52,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:52,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:35:52,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:52,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:35:52,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:52,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:35:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:52,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:52,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:52,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 22:35:52,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:52,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 22:35:52,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:52,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:35:52,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:52,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:35:52,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:52,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 22:35:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:52,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:52,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:52,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 22:35:52,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:52,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 22:35:52,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:52,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:35:52,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:52,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-26 22:35:52,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:52,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-10-26 22:35:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:52,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:52,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:52,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:35:52,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:52,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-26 22:35:52,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:52,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:35:52,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:35:52,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:35:52,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 238 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-26 22:35:52,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215552902] [2020-10-26 22:35:52,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:35:52,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:35:52,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550808820] [2020-10-26 22:35:52,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:35:52,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:35:52,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:35:52,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:35:52,933 INFO L87 Difference]: Start difference. First operand 14226 states and 16954 transitions. Second operand 7 states. [2020-10-26 22:35:57,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:35:57,436 INFO L93 Difference]: Finished difference Result 29804 states and 35552 transitions. [2020-10-26 22:35:57,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:35:57,437 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 360 [2020-10-26 22:35:57,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:35:57,491 INFO L225 Difference]: With dead ends: 29804 [2020-10-26 22:35:57,491 INFO L226 Difference]: Without dead ends: 18090 [2020-10-26 22:35:57,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:35:57,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18090 states. [2020-10-26 22:35:57,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18090 to 16552. [2020-10-26 22:35:57,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16552 states. [2020-10-26 22:35:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16552 states to 16552 states and 19564 transitions. [2020-10-26 22:35:57,894 INFO L78 Accepts]: Start accepts. Automaton has 16552 states and 19564 transitions. Word has length 360 [2020-10-26 22:35:57,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:35:57,895 INFO L481 AbstractCegarLoop]: Abstraction has 16552 states and 19564 transitions. [2020-10-26 22:35:57,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:35:57,896 INFO L276 IsEmpty]: Start isEmpty. Operand 16552 states and 19564 transitions. [2020-10-26 22:35:57,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-10-26 22:35:57,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:35:57,912 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 22:35:57,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 22:35:57,913 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:35:57,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:35:57,913 INFO L82 PathProgramCache]: Analyzing trace with hash 96345775, now seen corresponding path program 1 times [2020-10-26 22:35:57,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:35:57,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45865925] [2020-10-26 22:35:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:35:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:58,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:58,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:58,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:58,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:00,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:01,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:03,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:03,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 377 [2020-10-26 22:36:03,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 22:36:03,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 22:36:03,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:03,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 22:36:03,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:36:03,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 252 [2020-10-26 22:36:03,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:03,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:03,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:03,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:03,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:03,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:03,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:36:03,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:03,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:03,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:03,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:36:03,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:03,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:03,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:03,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:03,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 22:36:03,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:03,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-26 22:36:03,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:03,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:03,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:03,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-10-26 22:36:03,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:03,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 22:36:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:03,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:03,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:03,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 22:36:03,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:03,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-26 22:36:03,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:03,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:03,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:03,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 22:36:03,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:03,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2020-10-26 22:36:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:03,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:03,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:03,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:36:03,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:03,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 22:36:03,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:03,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:03,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-26 22:36:03,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:03,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 92 proven. 211 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 22:36:03,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45865925] [2020-10-26 22:36:03,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:03,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:36:03,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931184443] [2020-10-26 22:36:03,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:36:03,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:03,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:36:03,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:36:03,939 INFO L87 Difference]: Start difference. First operand 16552 states and 19564 transitions. Second operand 8 states. [2020-10-26 22:36:07,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:07,143 INFO L93 Difference]: Finished difference Result 30608 states and 36310 transitions. [2020-10-26 22:36:07,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:36:07,144 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 361 [2020-10-26 22:36:07,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:07,183 INFO L225 Difference]: With dead ends: 30608 [2020-10-26 22:36:07,183 INFO L226 Difference]: Without dead ends: 16574 [2020-10-26 22:36:07,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-26 22:36:07,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16574 states. [2020-10-26 22:36:07,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16574 to 16548. [2020-10-26 22:36:07,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16548 states. [2020-10-26 22:36:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16548 states to 16548 states and 19552 transitions. [2020-10-26 22:36:07,539 INFO L78 Accepts]: Start accepts. Automaton has 16548 states and 19552 transitions. Word has length 361 [2020-10-26 22:36:07,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:07,540 INFO L481 AbstractCegarLoop]: Abstraction has 16548 states and 19552 transitions. [2020-10-26 22:36:07,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:36:07,540 INFO L276 IsEmpty]: Start isEmpty. Operand 16548 states and 19552 transitions. [2020-10-26 22:36:07,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-10-26 22:36:07,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:07,554 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:07,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 22:36:07,554 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:07,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:07,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1545013040, now seen corresponding path program 1 times [2020-10-26 22:36:07,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:07,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201550704] [2020-10-26 22:36:07,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:07,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:07,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:07,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:09,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:11,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:12,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:12,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 383 [2020-10-26 22:36:12,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:36:12,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 22:36:12,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:12,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 22:36:12,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:36:12,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 240 [2020-10-26 22:36:12,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:12,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:12,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:12,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:12,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:12,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:12,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 22:36:12,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:12,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:12,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:12,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:36:12,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:12,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:12,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:13,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:13,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:36:13,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:13,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-26 22:36:13,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:13,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:13,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:13,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-26 22:36:13,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:13,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:36:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:13,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:13,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:13,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 22:36:13,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:13,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-26 22:36:13,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:13,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:36:13,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:13,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 22:36:13,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:13,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-10-26 22:36:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:13,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:13,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:13,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:13,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 22:36:13,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:36:13,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-26 22:36:13,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:13,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:13,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:13,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:36:13,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 258 proven. 79 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 22:36:13,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201550704] [2020-10-26 22:36:13,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:13,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 22:36:13,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472274126] [2020-10-26 22:36:13,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 22:36:13,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:13,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 22:36:13,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:36:13,929 INFO L87 Difference]: Start difference. First operand 16548 states and 19552 transitions. Second operand 11 states. [2020-10-26 22:36:14,146 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-10-26 22:36:16,054 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-26 22:36:18,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:18,699 INFO L93 Difference]: Finished difference Result 30674 states and 36643 transitions. [2020-10-26 22:36:18,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 22:36:18,700 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 367 [2020-10-26 22:36:18,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:18,750 INFO L225 Difference]: With dead ends: 30674 [2020-10-26 22:36:18,750 INFO L226 Difference]: Without dead ends: 16624 [2020-10-26 22:36:18,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-26 22:36:18,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16624 states. [2020-10-26 22:36:19,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16624 to 16538. [2020-10-26 22:36:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16538 states. [2020-10-26 22:36:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16538 states to 16538 states and 19523 transitions. [2020-10-26 22:36:19,173 INFO L78 Accepts]: Start accepts. Automaton has 16538 states and 19523 transitions. Word has length 367 [2020-10-26 22:36:19,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:19,174 INFO L481 AbstractCegarLoop]: Abstraction has 16538 states and 19523 transitions. [2020-10-26 22:36:19,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 22:36:19,174 INFO L276 IsEmpty]: Start isEmpty. Operand 16538 states and 19523 transitions. [2020-10-26 22:36:19,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2020-10-26 22:36:19,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:19,189 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:19,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 22:36:19,189 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:19,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:19,190 INFO L82 PathProgramCache]: Analyzing trace with hash -92768887, now seen corresponding path program 1 times [2020-10-26 22:36:19,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:19,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290216448] [2020-10-26 22:36:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:19,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:19,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:20,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:20,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 385 [2020-10-26 22:36:20,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:36:20,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1244 [2020-10-26 22:36:20,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:20,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:36:20,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 259 [2020-10-26 22:36:20,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-26 22:36:20,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:20,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:20,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:20,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:20,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:20,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:20,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:36:20,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:20,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:20,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:20,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:20,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:20,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:20,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:20,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:20,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:36:20,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:20,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 22:36:20,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:20,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:20,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:20,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:20,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:20,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:36:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:20,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:20,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:20,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:36:20,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:20,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-26 22:36:20,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:20,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:20,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:20,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-26 22:36:20,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:20,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 22:36:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:20,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:21,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:21,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 22:36:21,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:21,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-26 22:36:21,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:21,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:21,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:21,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 22:36:21,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 224 proven. 30 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-10-26 22:36:21,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290216448] [2020-10-26 22:36:21,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:21,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:36:21,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552195388] [2020-10-26 22:36:21,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:36:21,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:21,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:36:21,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:36:21,273 INFO L87 Difference]: Start difference. First operand 16538 states and 19523 transitions. Second operand 6 states. [2020-10-26 22:36:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:24,284 INFO L93 Difference]: Finished difference Result 29554 states and 35798 transitions. [2020-10-26 22:36:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:36:24,285 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 369 [2020-10-26 22:36:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:24,323 INFO L225 Difference]: With dead ends: 29554 [2020-10-26 22:36:24,324 INFO L226 Difference]: Without dead ends: 15530 [2020-10-26 22:36:24,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:36:24,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15530 states. [2020-10-26 22:36:24,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15530 to 14246. [2020-10-26 22:36:24,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14246 states. [2020-10-26 22:36:24,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14246 states to 14246 states and 16564 transitions. [2020-10-26 22:36:24,696 INFO L78 Accepts]: Start accepts. Automaton has 14246 states and 16564 transitions. Word has length 369 [2020-10-26 22:36:24,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:24,696 INFO L481 AbstractCegarLoop]: Abstraction has 14246 states and 16564 transitions. [2020-10-26 22:36:24,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:36:24,696 INFO L276 IsEmpty]: Start isEmpty. Operand 14246 states and 16564 transitions. [2020-10-26 22:36:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-10-26 22:36:24,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:24,709 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:24,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 22:36:24,710 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:24,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:24,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1978414724, now seen corresponding path program 1 times [2020-10-26 22:36:24,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:24,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852031022] [2020-10-26 22:36:24,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:24,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:24,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:25,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:27,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:28,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:29,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:29,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 390 [2020-10-26 22:36:29,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:36:29,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 22:36:29,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:29,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:29,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-26 22:36:29,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-26 22:36:29,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:29,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:29,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:29,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:29,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:29,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:29,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:36:29,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:29,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:29,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:29,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:29,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:29,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:30,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:30,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:30,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:36:30,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:30,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-26 22:36:30,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:30,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:30,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:30,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:36:30,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:30,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:36:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:30,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:30,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:30,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 22:36:30,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:30,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-26 22:36:30,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:30,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:30,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:30,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:36:30,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:30,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-10-26 22:36:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:30,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:30,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:30,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:36:30,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:30,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 22:36:30,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:30,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:30,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-26 22:36:30,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:30,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 198 proven. 79 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-26 22:36:30,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852031022] [2020-10-26 22:36:30,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:30,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:36:30,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861788908] [2020-10-26 22:36:30,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:36:30,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:30,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:36:30,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:36:30,623 INFO L87 Difference]: Start difference. First operand 14246 states and 16564 transitions. Second operand 7 states. [2020-10-26 22:36:34,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:34,173 INFO L93 Difference]: Finished difference Result 26995 states and 31400 transitions. [2020-10-26 22:36:34,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:36:34,174 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 374 [2020-10-26 22:36:34,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:34,202 INFO L225 Difference]: With dead ends: 26995 [2020-10-26 22:36:34,202 INFO L226 Difference]: Without dead ends: 15063 [2020-10-26 22:36:34,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:36:34,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15063 states. [2020-10-26 22:36:34,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15063 to 14826. [2020-10-26 22:36:34,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14826 states. [2020-10-26 22:36:34,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14826 states to 14826 states and 17077 transitions. [2020-10-26 22:36:34,529 INFO L78 Accepts]: Start accepts. Automaton has 14826 states and 17077 transitions. Word has length 374 [2020-10-26 22:36:34,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:34,530 INFO L481 AbstractCegarLoop]: Abstraction has 14826 states and 17077 transitions. [2020-10-26 22:36:34,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:36:34,530 INFO L276 IsEmpty]: Start isEmpty. Operand 14826 states and 17077 transitions. [2020-10-26 22:36:34,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2020-10-26 22:36:34,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:34,542 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:34,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 22:36:34,542 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:34,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:34,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1567964186, now seen corresponding path program 1 times [2020-10-26 22:36:34,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:34,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489643062] [2020-10-26 22:36:34,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:34,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:34,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:36,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:36,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 392 [2020-10-26 22:36:36,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:36:36,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1796 [2020-10-26 22:36:36,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:36,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:36,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 281 [2020-10-26 22:36:36,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 22:36:36,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:36,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:36,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:36,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:36,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:36,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:36,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:36:36,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:36,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:36,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:36,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:36,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:36,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:36,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:36,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:36,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:36:36,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:36,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 22:36:36,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:36,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:36,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:36,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:36,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:36,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:36:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:36,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:36,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:36,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-26 22:36:36,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:36,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-26 22:36:36,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:36,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:36,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:36,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-26 22:36:36,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:36,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2020-10-26 22:36:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:36,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:36,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:36,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 22:36:36,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:36,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-26 22:36:36,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:36,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:36,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:36,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 22:36:36,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 226 proven. 2 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-26 22:36:37,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489643062] [2020-10-26 22:36:37,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:37,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:36:37,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908105158] [2020-10-26 22:36:37,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:36:37,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:37,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:36:37,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:36:37,176 INFO L87 Difference]: Start difference. First operand 14826 states and 17077 transitions. Second operand 7 states. [2020-10-26 22:36:42,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:42,126 INFO L93 Difference]: Finished difference Result 31632 states and 36391 transitions. [2020-10-26 22:36:42,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:36:42,127 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 376 [2020-10-26 22:36:42,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:42,156 INFO L225 Difference]: With dead ends: 31632 [2020-10-26 22:36:42,156 INFO L226 Difference]: Without dead ends: 17190 [2020-10-26 22:36:42,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:36:42,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17190 states. [2020-10-26 22:36:42,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17190 to 17126. [2020-10-26 22:36:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17126 states. [2020-10-26 22:36:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17126 states to 17126 states and 19513 transitions. [2020-10-26 22:36:42,528 INFO L78 Accepts]: Start accepts. Automaton has 17126 states and 19513 transitions. Word has length 376 [2020-10-26 22:36:42,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:42,529 INFO L481 AbstractCegarLoop]: Abstraction has 17126 states and 19513 transitions. [2020-10-26 22:36:42,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:36:42,529 INFO L276 IsEmpty]: Start isEmpty. Operand 17126 states and 19513 transitions. [2020-10-26 22:36:42,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2020-10-26 22:36:42,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:42,542 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:42,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 22:36:42,542 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:42,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:42,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1822593057, now seen corresponding path program 1 times [2020-10-26 22:36:42,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:42,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725476015] [2020-10-26 22:36:42,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:42,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:42,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:43,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:44,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:44,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 397 [2020-10-26 22:36:44,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:36:44,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1900 [2020-10-26 22:36:44,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 259 [2020-10-26 22:36:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-26 22:36:44,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:44,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:44,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:44,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:44,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:44,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:44,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 22:36:44,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:44,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:44,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:44,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:44,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:36:44,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:44,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:44,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:44,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:36:44,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:44,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-26 22:36:44,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:44,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:44,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:44,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:44,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:44,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:36:44,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:44,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:45,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:45,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:36:45,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:45,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-26 22:36:45,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:45,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:45,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:45,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-26 22:36:45,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:45,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 22:36:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:45,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:45,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:45,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 22:36:45,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:45,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-26 22:36:45,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:45,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:45,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:45,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 22:36:45,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 280 proven. 2 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-26 22:36:45,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725476015] [2020-10-26 22:36:45,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:45,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:36:45,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33474359] [2020-10-26 22:36:45,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:36:45,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:45,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:36:45,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:36:45,601 INFO L87 Difference]: Start difference. First operand 17126 states and 19513 transitions. Second operand 7 states. [2020-10-26 22:36:49,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:49,065 INFO L93 Difference]: Finished difference Result 31422 states and 35890 transitions. [2020-10-26 22:36:49,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:36:49,066 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 381 [2020-10-26 22:36:49,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:49,105 INFO L225 Difference]: With dead ends: 31422 [2020-10-26 22:36:49,105 INFO L226 Difference]: Without dead ends: 17572 [2020-10-26 22:36:49,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:36:49,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17572 states. [2020-10-26 22:36:49,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17572 to 17320. [2020-10-26 22:36:49,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17320 states. [2020-10-26 22:36:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17320 states to 17320 states and 19730 transitions. [2020-10-26 22:36:49,468 INFO L78 Accepts]: Start accepts. Automaton has 17320 states and 19730 transitions. Word has length 381 [2020-10-26 22:36:49,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:49,469 INFO L481 AbstractCegarLoop]: Abstraction has 17320 states and 19730 transitions. [2020-10-26 22:36:49,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:36:49,469 INFO L276 IsEmpty]: Start isEmpty. Operand 17320 states and 19730 transitions. [2020-10-26 22:36:49,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2020-10-26 22:36:49,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:49,483 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:49,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 22:36:49,483 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:49,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:49,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1114644801, now seen corresponding path program 1 times [2020-10-26 22:36:49,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:49,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741167978] [2020-10-26 22:36:49,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:49,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:49,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:50,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:51,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:51,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:53,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:53,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 420 [2020-10-26 22:36:53,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:36:53,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3841 [2020-10-26 22:36:53,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:53,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:53,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-26 22:36:53,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 174 [2020-10-26 22:36:53,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:53,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:53,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:53,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:53,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:53,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:53,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:36:53,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:53,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:53,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:53,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:53,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:53,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:53,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:53,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:53,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:36:53,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:53,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 22:36:53,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:53,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:53,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:53,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:36:53,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:53,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:36:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:53,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:53,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:53,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 22:36:53,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:53,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-26 22:36:53,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:53,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:53,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:53,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-10-26 22:36:53,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:53,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 295 [2020-10-26 22:36:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:53,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:54,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:54,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:36:54,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:54,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 22:36:54,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:54,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:54,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-26 22:36:54,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:54,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 204 proven. 79 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-26 22:36:54,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741167978] [2020-10-26 22:36:54,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:54,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:36:54,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931078235] [2020-10-26 22:36:54,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:36:54,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:54,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:36:54,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:36:54,115 INFO L87 Difference]: Start difference. First operand 17320 states and 19730 transitions. Second operand 7 states. [2020-10-26 22:36:59,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:59,406 INFO L93 Difference]: Finished difference Result 36816 states and 42341 transitions. [2020-10-26 22:36:59,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:36:59,407 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 404 [2020-10-26 22:36:59,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:59,442 INFO L225 Difference]: With dead ends: 36816 [2020-10-26 22:36:59,442 INFO L226 Difference]: Without dead ends: 19880 [2020-10-26 22:36:59,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:36:59,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19880 states. [2020-10-26 22:36:59,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19880 to 19810. [2020-10-26 22:36:59,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19810 states. [2020-10-26 22:36:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19810 states to 19810 states and 22670 transitions. [2020-10-26 22:36:59,770 INFO L78 Accepts]: Start accepts. Automaton has 19810 states and 22670 transitions. Word has length 404 [2020-10-26 22:36:59,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:59,770 INFO L481 AbstractCegarLoop]: Abstraction has 19810 states and 22670 transitions. [2020-10-26 22:36:59,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:36:59,771 INFO L276 IsEmpty]: Start isEmpty. Operand 19810 states and 22670 transitions. [2020-10-26 22:36:59,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2020-10-26 22:36:59,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:59,786 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 3, 3, 3, 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] [2020-10-26 22:36:59,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 22:36:59,786 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:59,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:59,787 INFO L82 PathProgramCache]: Analyzing trace with hash -97110152, now seen corresponding path program 1 times [2020-10-26 22:36:59,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:59,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858573014] [2020-10-26 22:36:59,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:59,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:00,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:00,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:03,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:04,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:04,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 439 [2020-10-26 22:37:04,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:37:04,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4997 [2020-10-26 22:37:04,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:04,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:04,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 318 [2020-10-26 22:37:04,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 22:37:04,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:05,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:05,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:05,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:05,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:05,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:05,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:37:05,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:05,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:05,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:05,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:05,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:05,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:05,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:05,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:05,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:37:05,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:05,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 22:37:05,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:05,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:05,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:05,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:05,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:05,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:37:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:05,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:05,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:05,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 22:37:05,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:05,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 22:37:05,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:05,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:05,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:05,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:05,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:05,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-10-26 22:37:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:05,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:05,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:05,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 22:37:05,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:05,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-26 22:37:05,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:05,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:05,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:05,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-26 22:37:05,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:05,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2020-10-26 22:37:05,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:05,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:05,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:05,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:37:05,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:05,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-26 22:37:05,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:05,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:05,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:05,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:37:05,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 357 proven. 2 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-10-26 22:37:05,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858573014] [2020-10-26 22:37:05,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:05,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:37:05,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232453659] [2020-10-26 22:37:05,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:37:05,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:05,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:37:05,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:37:05,919 INFO L87 Difference]: Start difference. First operand 19810 states and 22670 transitions. Second operand 7 states. [2020-10-26 22:37:10,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:10,374 INFO L93 Difference]: Finished difference Result 40635 states and 46993 transitions. [2020-10-26 22:37:10,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:37:10,377 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 421 [2020-10-26 22:37:10,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:10,419 INFO L225 Difference]: With dead ends: 40635 [2020-10-26 22:37:10,419 INFO L226 Difference]: Without dead ends: 21019 [2020-10-26 22:37:10,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:37:10,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21019 states. [2020-10-26 22:37:10,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21019 to 20929. [2020-10-26 22:37:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20929 states. [2020-10-26 22:37:10,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20929 states to 20929 states and 23957 transitions. [2020-10-26 22:37:10,746 INFO L78 Accepts]: Start accepts. Automaton has 20929 states and 23957 transitions. Word has length 421 [2020-10-26 22:37:10,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:10,746 INFO L481 AbstractCegarLoop]: Abstraction has 20929 states and 23957 transitions. [2020-10-26 22:37:10,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:37:10,746 INFO L276 IsEmpty]: Start isEmpty. Operand 20929 states and 23957 transitions. [2020-10-26 22:37:10,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-10-26 22:37:10,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:10,761 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:37:10,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 22:37:10,761 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:10,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:10,762 INFO L82 PathProgramCache]: Analyzing trace with hash -2074583036, now seen corresponding path program 1 times [2020-10-26 22:37:10,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:10,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670128723] [2020-10-26 22:37:10,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:10,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:11,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:11,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:12,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:12,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 439 [2020-10-26 22:37:12,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:37:12,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1514 [2020-10-26 22:37:12,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:12,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:37:12,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 317 [2020-10-26 22:37:12,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-26 22:37:12,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:12,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:12,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:12,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:12,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:12,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:12,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:37:12,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:12,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:12,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:12,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:12,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:12,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:12,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:12,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:12,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:37:12,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:12,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-26 22:37:12,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:12,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:12,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:12,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:12,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:12,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:37:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:12,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:12,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:12,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-26 22:37:12,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:12,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-26 22:37:12,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:12,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:12,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:12,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-26 22:37:12,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:12,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-10-26 22:37:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:12,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:13,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:13,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:13,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:37:13,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:37:13,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-26 22:37:13,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:13,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:13,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:13,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:37:13,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 214 proven. 30 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-26 22:37:13,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670128723] [2020-10-26 22:37:13,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:13,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:37:13,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533729168] [2020-10-26 22:37:13,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:37:13,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:13,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:37:13,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:37:13,174 INFO L87 Difference]: Start difference. First operand 20929 states and 23957 transitions. Second operand 6 states. [2020-10-26 22:37:16,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:16,713 INFO L93 Difference]: Finished difference Result 43550 states and 50408 transitions. [2020-10-26 22:37:16,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:37:16,719 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 423 [2020-10-26 22:37:16,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:16,767 INFO L225 Difference]: With dead ends: 43550 [2020-10-26 22:37:16,768 INFO L226 Difference]: Without dead ends: 23005 [2020-10-26 22:37:16,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:37:16,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23005 states. [2020-10-26 22:37:17,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23005 to 22631. [2020-10-26 22:37:17,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22631 states. [2020-10-26 22:37:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22631 states to 22631 states and 25818 transitions. [2020-10-26 22:37:17,161 INFO L78 Accepts]: Start accepts. Automaton has 22631 states and 25818 transitions. Word has length 423 [2020-10-26 22:37:17,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:17,162 INFO L481 AbstractCegarLoop]: Abstraction has 22631 states and 25818 transitions. [2020-10-26 22:37:17,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:37:17,162 INFO L276 IsEmpty]: Start isEmpty. Operand 22631 states and 25818 transitions. [2020-10-26 22:37:17,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-10-26 22:37:17,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:17,176 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:37:17,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 22:37:17,176 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:17,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:17,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1813551755, now seen corresponding path program 1 times [2020-10-26 22:37:17,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:17,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604798420] [2020-10-26 22:37:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:17,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:17,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:17,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 492 [2020-10-26 22:37:17,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:17,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 560 [2020-10-26 22:37:17,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:17,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:17,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 452 [2020-10-26 22:37:17,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 22:37:17,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:18,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:18,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:18,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:18,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:18,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:18,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:37:18,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:18,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:18,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:18,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:18,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:18,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:18,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:18,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:18,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 22:37:18,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:18,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 22:37:18,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:18,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:18,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 22:37:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:18,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:18,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:18,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-26 22:37:18,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:18,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 22:37:18,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:18,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:18,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:18,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:18,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:18,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-10-26 22:37:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:18,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:18,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:18,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 22:37:18,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:18,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-26 22:37:18,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:18,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:18,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:18,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-26 22:37:18,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 90 proven. 3 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2020-10-26 22:37:18,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604798420] [2020-10-26 22:37:18,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:18,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:37:18,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968680528] [2020-10-26 22:37:18,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:37:18,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:18,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:37:18,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:37:18,655 INFO L87 Difference]: Start difference. First operand 22631 states and 25818 transitions. Second operand 5 states. [2020-10-26 22:37:21,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:21,728 INFO L93 Difference]: Finished difference Result 25704 states and 29251 transitions. [2020-10-26 22:37:21,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:37:21,729 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-10-26 22:37:21,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:21,771 INFO L225 Difference]: With dead ends: 25704 [2020-10-26 22:37:21,771 INFO L226 Difference]: Without dead ends: 25701 [2020-10-26 22:37:21,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:37:21,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25701 states. [2020-10-26 22:37:22,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25701 to 23197. [2020-10-26 22:37:22,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23197 states. [2020-10-26 22:37:22,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23197 states to 23197 states and 26471 transitions. [2020-10-26 22:37:22,132 INFO L78 Accepts]: Start accepts. Automaton has 23197 states and 26471 transitions. Word has length 476 [2020-10-26 22:37:22,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:22,132 INFO L481 AbstractCegarLoop]: Abstraction has 23197 states and 26471 transitions. [2020-10-26 22:37:22,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:37:22,132 INFO L276 IsEmpty]: Start isEmpty. Operand 23197 states and 26471 transitions. [2020-10-26 22:37:22,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-10-26 22:37:22,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:22,147 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:37:22,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 22:37:22,147 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:22,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:22,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1861126807, now seen corresponding path program 1 times [2020-10-26 22:37:22,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:22,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797298537] [2020-10-26 22:37:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:22,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:22,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:24,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:26,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:26,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 524 [2020-10-26 22:37:26,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:37:26,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4440 [2020-10-26 22:37:26,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:26,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 22:37:26,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:37:26,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 481 [2020-10-26 22:37:26,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:26,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:26,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:26,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:26,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:26,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:26,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 22:37:26,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:26,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:26,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:26,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:37:26,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:26,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:26,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:26,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:26,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:37:26,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:26,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-26 22:37:26,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:26,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:26,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:26,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-26 22:37:26,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:27,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:37:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:27,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:27,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:27,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:37:27,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:27,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-26 22:37:27,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:27,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:37:27,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:27,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-26 22:37:27,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:27,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 22:37:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:27,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:27,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:27,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 22:37:27,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:27,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-26 22:37:27,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:27,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:27,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:27,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 22:37:27,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:27,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-10-26 22:37:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:27,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:27,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:27,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-26 22:37:27,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:27,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-26 22:37:27,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:27,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:27,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:27,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-26 22:37:27,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 133 proven. 308 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2020-10-26 22:37:27,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797298537] [2020-10-26 22:37:27,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:27,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 22:37:27,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915528111] [2020-10-26 22:37:27,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 22:37:27,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:27,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 22:37:27,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:37:27,854 INFO L87 Difference]: Start difference. First operand 23197 states and 26471 transitions. Second operand 10 states. [2020-10-26 22:37:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:35,338 INFO L93 Difference]: Finished difference Result 43738 states and 50861 transitions. [2020-10-26 22:37:35,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 22:37:35,340 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 506 [2020-10-26 22:37:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:35,396 INFO L225 Difference]: With dead ends: 43738 [2020-10-26 22:37:35,396 INFO L226 Difference]: Without dead ends: 24573 [2020-10-26 22:37:35,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2020-10-26 22:37:35,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24573 states. [2020-10-26 22:37:35,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24573 to 23575. [2020-10-26 22:37:35,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23575 states. [2020-10-26 22:37:35,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23575 states to 23575 states and 26890 transitions. [2020-10-26 22:37:35,978 INFO L78 Accepts]: Start accepts. Automaton has 23575 states and 26890 transitions. Word has length 506 [2020-10-26 22:37:35,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:35,979 INFO L481 AbstractCegarLoop]: Abstraction has 23575 states and 26890 transitions. [2020-10-26 22:37:35,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 22:37:35,979 INFO L276 IsEmpty]: Start isEmpty. Operand 23575 states and 26890 transitions. [2020-10-26 22:37:36,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2020-10-26 22:37:36,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:36,005 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 22:37:36,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 22:37:36,005 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:36,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:36,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1007166205, now seen corresponding path program 1 times [2020-10-26 22:37:36,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:36,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252320996] [2020-10-26 22:37:36,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:36,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:36,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:36,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:37,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:41,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:41,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 541 [2020-10-26 22:37:41,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:37:41,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-26 22:37:41,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 22:37:41,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:37:41,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 358 [2020-10-26 22:37:41,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:41,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:41,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:41,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:41,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:41,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:41,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 22:37:41,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:41,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:41,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:41,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:37:41,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:41,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:41,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:41,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:41,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:37:41,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:41,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-26 22:37:41,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:41,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:41,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:41,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-26 22:37:41,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:41,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:37:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:41,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:41,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:41,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 22:37:41,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:41,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-26 22:37:41,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:41,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:37:41,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:41,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-26 22:37:41,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:41,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-10-26 22:37:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:41,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:42,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:42,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:42,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-26 22:37:42,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:37:42,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-26 22:37:42,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:42,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:42,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:42,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-26 22:37:42,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:42,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 357 [2020-10-26 22:37:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:42,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:42,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:42,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-26 22:37:42,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:42,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-26 22:37:42,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:42,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:42,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 135 [2020-10-26 22:37:42,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:42,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 212 proven. 417 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-26 22:37:42,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252320996] [2020-10-26 22:37:42,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:42,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 22:37:42,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955577854] [2020-10-26 22:37:42,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 22:37:42,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:42,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 22:37:42,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:37:42,654 INFO L87 Difference]: Start difference. First operand 23575 states and 26890 transitions. Second operand 10 states. [2020-10-26 22:37:51,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:51,002 INFO L93 Difference]: Finished difference Result 50788 states and 58730 transitions. [2020-10-26 22:37:51,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 22:37:51,003 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 523 [2020-10-26 22:37:51,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:51,082 INFO L225 Difference]: With dead ends: 50788 [2020-10-26 22:37:51,082 INFO L226 Difference]: Without dead ends: 29893 [2020-10-26 22:37:51,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2020-10-26 22:37:51,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29893 states.