/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:46:08,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:46:08,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:46:08,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:46:08,281 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:46:08,282 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:46:08,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:46:08,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:46:08,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:46:08,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:46:08,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:46:08,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:46:08,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:46:08,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:46:08,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:46:08,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:46:08,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:46:08,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:46:08,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:46:08,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:46:08,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:46:08,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:46:08,311 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:46:08,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:46:08,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:46:08,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:46:08,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:46:08,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:46:08,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:46:08,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:46:08,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:46:08,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:46:08,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:46:08,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:46:08,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:46:08,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:46:08,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:46:08,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:46:08,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:46:08,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:46:08,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:46:08,339 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 20:46:08,367 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:46:08,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:46:08,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:46:08,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:46:08,369 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:46:08,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:46:08,370 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:46:08,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:46:08,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:46:08,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:46:08,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:46:08,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:46:08,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:46:08,371 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:46:08,371 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:46:08,372 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:46:08,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:46:08,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:46:08,372 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:46:08,373 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:46:08,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:46:08,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:46:08,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:46:08,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:46:08,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:46:08,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:46:08,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:46:08,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:46:08,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:46:08,375 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:46:08,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:46:08,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:46:08,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:46:08,819 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:46:08,820 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:46:08,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label27.c [2020-10-26 20:46:08,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab19cdb45/f382af785be047a2becdbe1ed7587f1a/FLAG716c17de2 [2020-10-26 20:46:09,901 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:46:09,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label27.c [2020-10-26 20:46:09,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab19cdb45/f382af785be047a2becdbe1ed7587f1a/FLAG716c17de2 [2020-10-26 20:46:10,025 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab19cdb45/f382af785be047a2becdbe1ed7587f1a [2020-10-26 20:46:10,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:46:10,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:46:10,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:46:10,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:46:10,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:46:10,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:46:10" (1/1) ... [2020-10-26 20:46:10,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@618b01bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:46:10, skipping insertion in model container [2020-10-26 20:46:10,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:46:10" (1/1) ... [2020-10-26 20:46:10,056 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:46:10,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:46:10,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:46:10,875 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:46:11,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:46:11,082 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:46:11,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:46:11 WrapperNode [2020-10-26 20:46:11,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:46:11,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:46:11,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:46:11,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:46:11,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:46:11" (1/1) ... [2020-10-26 20:46:11,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:46:11" (1/1) ... [2020-10-26 20:46:11,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:46:11" (1/1) ... [2020-10-26 20:46:11,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:46:11" (1/1) ... [2020-10-26 20:46:11,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:46:11" (1/1) ... [2020-10-26 20:46:11,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:46:11" (1/1) ... [2020-10-26 20:46:11,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:46:11" (1/1) ... [2020-10-26 20:46:11,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:46:11,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:46:11,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:46:11,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:46:11,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:46:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:46:11,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:46:11,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:46:11,329 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:46:11,329 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:46:11,329 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:46:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:46:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:46:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:46:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:46:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:46:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:46:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:46:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:46:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:46:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:46:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:46:11,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:46:11,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:46:11,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:46:13,524 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:46:13,525 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:46:13,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:46:13 BoogieIcfgContainer [2020-10-26 20:46:13,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:46:13,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:46:13,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:46:13,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:46:13,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:46:10" (1/3) ... [2020-10-26 20:46:13,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ffee75e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:46:13, skipping insertion in model container [2020-10-26 20:46:13,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:46:11" (2/3) ... [2020-10-26 20:46:13,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ffee75e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:46:13, skipping insertion in model container [2020-10-26 20:46:13,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:46:13" (3/3) ... [2020-10-26 20:46:13,537 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label27.c [2020-10-26 20:46:13,551 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:46:13,558 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:46:13,574 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:46:13,608 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:46:13,608 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:46:13,608 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:46:13,608 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:46:13,608 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:46:13,609 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:46:13,609 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:46:13,609 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:46:13,636 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:46:13,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-26 20:46:13,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:13,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:13,656 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:13,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:13,663 INFO L82 PathProgramCache]: Analyzing trace with hash -516174384, now seen corresponding path program 1 times [2020-10-26 20:46:13,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:13,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975286304] [2020-10-26 20:46:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:14,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:15,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:17,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:17,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-26 20:46:17,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:46:17,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3463 [2020-10-26 20:46:17,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:17,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:46:17,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:17,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-10-26 20:46:17,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:46:18,152 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:18,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:18,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:18,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:18,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:18,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:18,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 20:46:18,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:18,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:18,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:18,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:18,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:46:18,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:46:18,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975286304] [2020-10-26 20:46:18,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:46:18,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 20:46:18,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926675790] [2020-10-26 20:46:18,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:46:18,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:18,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:46:18,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:46:18,382 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 4 states. [2020-10-26 20:46:18,637 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:46:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:21,736 INFO L93 Difference]: Finished difference Result 858 states and 1506 transitions. [2020-10-26 20:46:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:46:21,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-10-26 20:46:21,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:21,756 INFO L225 Difference]: With dead ends: 858 [2020-10-26 20:46:21,756 INFO L226 Difference]: Without dead ends: 466 [2020-10-26 20:46:21,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:46:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-10-26 20:46:21,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 461. [2020-10-26 20:46:21,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2020-10-26 20:46:21,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 647 transitions. [2020-10-26 20:46:21,906 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 647 transitions. Word has length 160 [2020-10-26 20:46:21,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:21,909 INFO L481 AbstractCegarLoop]: Abstraction has 461 states and 647 transitions. [2020-10-26 20:46:21,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:46:21,910 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 647 transitions. [2020-10-26 20:46:21,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-26 20:46:21,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:21,923 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:21,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:46:21,924 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:21,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:21,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1960320047, now seen corresponding path program 1 times [2020-10-26 20:46:21,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:21,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861727194] [2020-10-26 20:46:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:22,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:22,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:24,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:24,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-26 20:46:24,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:46:24,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2295 [2020-10-26 20:46:24,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:24,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:46:24,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:24,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:46:24,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:24,586 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:24,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:24,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:24,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:24,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:24,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:24,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:46:24,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:24,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:24,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:24,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:24,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:24,762 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:46:24,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:24,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:24,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:24,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 20:46:24,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:24,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-26 20:46:24,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:24,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:24,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:24,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 20:46:24,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:46:24,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861727194] [2020-10-26 20:46:24,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:46:24,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:46:24,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915520010] [2020-10-26 20:46:24,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:46:24,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:24,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:46:24,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:46:24,899 INFO L87 Difference]: Start difference. First operand 461 states and 647 transitions. Second operand 7 states. [2020-10-26 20:46:25,223 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:46:28,284 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:46:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:29,386 INFO L93 Difference]: Finished difference Result 1393 states and 1984 transitions. [2020-10-26 20:46:29,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:46:29,387 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 172 [2020-10-26 20:46:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:29,396 INFO L225 Difference]: With dead ends: 1393 [2020-10-26 20:46:29,396 INFO L226 Difference]: Without dead ends: 938 [2020-10-26 20:46:29,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:46:29,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2020-10-26 20:46:29,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 920. [2020-10-26 20:46:29,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 920 states. [2020-10-26 20:46:29,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1274 transitions. [2020-10-26 20:46:29,474 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1274 transitions. Word has length 172 [2020-10-26 20:46:29,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:29,474 INFO L481 AbstractCegarLoop]: Abstraction has 920 states and 1274 transitions. [2020-10-26 20:46:29,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:46:29,474 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1274 transitions. [2020-10-26 20:46:29,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-26 20:46:29,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:29,479 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:29,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:46:29,480 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:29,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:29,481 INFO L82 PathProgramCache]: Analyzing trace with hash -323483543, now seen corresponding path program 1 times [2020-10-26 20:46:29,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:29,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602042579] [2020-10-26 20:46:29,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:29,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:30,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:30,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-26 20:46:30,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:30,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-10-26 20:46:30,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:30,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:30,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:46:30,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-26 20:46:30,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:46:30,710 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:30,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:30,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:30,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:30,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:30,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:30,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:46:30,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:30,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:46:30,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:30,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:46:30,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:46:30,873 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:46:30,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:30,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:30,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:30,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:46:30,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:30,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-26 20:46:30,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:30,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:30,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:30,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:46:30,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:46:31,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602042579] [2020-10-26 20:46:31,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:31,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:46:31,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102930773] [2020-10-26 20:46:31,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:46:31,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:31,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:46:31,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:46:31,088 INFO L87 Difference]: Start difference. First operand 920 states and 1274 transitions. Second operand 5 states. [2020-10-26 20:46:31,505 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:46:34,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:34,567 INFO L93 Difference]: Finished difference Result 2702 states and 3787 transitions. [2020-10-26 20:46:34,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:46:34,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 181 [2020-10-26 20:46:34,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:34,580 INFO L225 Difference]: With dead ends: 2702 [2020-10-26 20:46:34,580 INFO L226 Difference]: Without dead ends: 1788 [2020-10-26 20:46:34,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:46:34,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2020-10-26 20:46:34,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1781. [2020-10-26 20:46:34,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1781 states. [2020-10-26 20:46:34,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 2346 transitions. [2020-10-26 20:46:34,657 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 2346 transitions. Word has length 181 [2020-10-26 20:46:34,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:34,658 INFO L481 AbstractCegarLoop]: Abstraction has 1781 states and 2346 transitions. [2020-10-26 20:46:34,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:46:34,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 2346 transitions. [2020-10-26 20:46:34,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-26 20:46:34,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:34,665 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:34,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:46:34,665 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:34,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:34,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2055571, now seen corresponding path program 1 times [2020-10-26 20:46:34,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:34,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068311088] [2020-10-26 20:46:34,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:34,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:35,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:36,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:36,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:36,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-26 20:46:36,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:46:36,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1826 [2020-10-26 20:46:36,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:36,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:36,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:46:36,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:46:36,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:36,828 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:36,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:36,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:36,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:36,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:36,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:36,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:46:36,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:36,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:46:36,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:36,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:46:36,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:36,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:36,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:37,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:37,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:46:37,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:37,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-26 20:46:37,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:37,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:37,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:37,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:46:37,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:37,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:46:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:37,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:37,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:37,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:46:37,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:37,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 20:46:37,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:37,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:37,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:37,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:46:37,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:46:37,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068311088] [2020-10-26 20:46:37,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:37,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:46:37,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803561108] [2020-10-26 20:46:37,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:46:37,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:37,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:46:37,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:46:37,232 INFO L87 Difference]: Start difference. First operand 1781 states and 2346 transitions. Second operand 7 states. [2020-10-26 20:46:37,687 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:46:38,157 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:46:43,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:43,827 INFO L93 Difference]: Finished difference Result 5190 states and 7190 transitions. [2020-10-26 20:46:43,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:46:43,828 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 191 [2020-10-26 20:46:43,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:43,854 INFO L225 Difference]: With dead ends: 5190 [2020-10-26 20:46:43,854 INFO L226 Difference]: Without dead ends: 3415 [2020-10-26 20:46:43,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:46:43,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3415 states. [2020-10-26 20:46:43,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3415 to 3349. [2020-10-26 20:46:43,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3349 states. [2020-10-26 20:46:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3349 states to 3349 states and 4419 transitions. [2020-10-26 20:46:44,013 INFO L78 Accepts]: Start accepts. Automaton has 3349 states and 4419 transitions. Word has length 191 [2020-10-26 20:46:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:44,013 INFO L481 AbstractCegarLoop]: Abstraction has 3349 states and 4419 transitions. [2020-10-26 20:46:44,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:46:44,014 INFO L276 IsEmpty]: Start isEmpty. Operand 3349 states and 4419 transitions. [2020-10-26 20:46:44,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-26 20:46:44,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:44,024 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:44,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:46:44,025 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:44,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:44,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1058654400, now seen corresponding path program 1 times [2020-10-26 20:46:44,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:44,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944894245] [2020-10-26 20:46:44,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:44,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:44,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:46,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:46,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-26 20:46:46,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:46:46,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2054 [2020-10-26 20:46:46,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:46,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:46:46,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:46,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:46:46,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:46,400 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:46,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:46,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:46,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:46,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:46,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:46,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:46:46,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:46,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:46,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:46,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:46,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 20:46:46,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:46,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:46,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:46,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:46:46,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:46,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-26 20:46:46,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:46,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:46,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:46,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:46:46,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:46,808 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 20:46:46,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944894245] [2020-10-26 20:46:46,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:46:46,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:46:46,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335155445] [2020-10-26 20:46:46,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:46:46,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:46,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:46:46,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:46:46,812 INFO L87 Difference]: Start difference. First operand 3349 states and 4419 transitions. Second operand 7 states. [2020-10-26 20:46:47,072 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:46:47,660 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:46:51,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:51,165 INFO L93 Difference]: Finished difference Result 7477 states and 10000 transitions. [2020-10-26 20:46:51,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:46:51,166 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 192 [2020-10-26 20:46:51,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:51,190 INFO L225 Difference]: With dead ends: 7477 [2020-10-26 20:46:51,191 INFO L226 Difference]: Without dead ends: 4347 [2020-10-26 20:46:51,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:46:51,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2020-10-26 20:46:51,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 4282. [2020-10-26 20:46:51,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4282 states. [2020-10-26 20:46:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4282 states to 4282 states and 5468 transitions. [2020-10-26 20:46:51,350 INFO L78 Accepts]: Start accepts. Automaton has 4282 states and 5468 transitions. Word has length 192 [2020-10-26 20:46:51,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:51,350 INFO L481 AbstractCegarLoop]: Abstraction has 4282 states and 5468 transitions. [2020-10-26 20:46:51,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:46:51,350 INFO L276 IsEmpty]: Start isEmpty. Operand 4282 states and 5468 transitions. [2020-10-26 20:46:51,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-26 20:46:51,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:51,361 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:51,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:46:51,362 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:51,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:51,362 INFO L82 PathProgramCache]: Analyzing trace with hash 94861129, now seen corresponding path program 1 times [2020-10-26 20:46:51,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:51,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477806198] [2020-10-26 20:46:51,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:51,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:51,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:52,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:55,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:56,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:56,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 222 [2020-10-26 20:46:56,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:46:56,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 20:46:56,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:56,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:46:56,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:56,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-26 20:46:56,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:56,717 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:56,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:56,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:56,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:56,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:56,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:56,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:46:56,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:56,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:56,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:56,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:56,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:56,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:56,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:56,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:56,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:56,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:46:56,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:46:56,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-26 20:46:56,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:56,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:56,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:56,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:46:56,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:56,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:46:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:56,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:57,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:57,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:46:57,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:57,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-26 20:46:57,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:57,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:57,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:57,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:46:57,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:57,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 20:46:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:57,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:57,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:57,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:46:57,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:57,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:46:57,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:57,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:46:57,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:46:57,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:46:57,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 42 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:46:57,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477806198] [2020-10-26 20:46:57,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:57,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:46:57,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231135145] [2020-10-26 20:46:57,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:46:57,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:57,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:46:57,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:46:57,413 INFO L87 Difference]: Start difference. First operand 4282 states and 5468 transitions. Second operand 8 states. [2020-10-26 20:46:57,679 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:46:58,911 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:47:01,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:01,804 INFO L93 Difference]: Finished difference Result 10499 states and 13811 transitions. [2020-10-26 20:47:01,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:47:01,805 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 206 [2020-10-26 20:47:01,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:01,840 INFO L225 Difference]: With dead ends: 10499 [2020-10-26 20:47:01,840 INFO L226 Difference]: Without dead ends: 6436 [2020-10-26 20:47:01,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:47:01,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6436 states. [2020-10-26 20:47:02,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6436 to 6311. [2020-10-26 20:47:02,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6311 states. [2020-10-26 20:47:02,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6311 states to 6311 states and 8050 transitions. [2020-10-26 20:47:02,046 INFO L78 Accepts]: Start accepts. Automaton has 6311 states and 8050 transitions. Word has length 206 [2020-10-26 20:47:02,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:02,046 INFO L481 AbstractCegarLoop]: Abstraction has 6311 states and 8050 transitions. [2020-10-26 20:47:02,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:47:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 6311 states and 8050 transitions. [2020-10-26 20:47:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-26 20:47:02,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:02,062 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:02,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:47:02,063 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:02,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:02,063 INFO L82 PathProgramCache]: Analyzing trace with hash -2011744361, now seen corresponding path program 1 times [2020-10-26 20:47:02,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:02,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786253997] [2020-10-26 20:47:02,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:02,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:02,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:03,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:04,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:04,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-26 20:47:04,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:47:04,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2333 [2020-10-26 20:47:04,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:04,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:04,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-26 20:47:04,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:47:04,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:04,735 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:04,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:04,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:04,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:04,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:04,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:04,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:47:04,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:04,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:04,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:04,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:04,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:04,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:04,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:04,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:04,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:47:04,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:04,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-26 20:47:04,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:04,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:04,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:04,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 20:47:04,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:04,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 20:47:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:04,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:04,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:04,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:47:04,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:04,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 20:47:04,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:04,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:04,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:04,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:47:05,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:47:05,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786253997] [2020-10-26 20:47:05,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:05,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:47:05,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88241494] [2020-10-26 20:47:05,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:47:05,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:05,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:47:05,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:47:05,152 INFO L87 Difference]: Start difference. First operand 6311 states and 8050 transitions. Second operand 8 states. [2020-10-26 20:47:05,411 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:47:05,895 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:47:06,940 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:47:11,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:11,386 INFO L93 Difference]: Finished difference Result 17727 states and 25186 transitions. [2020-10-26 20:47:11,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 20:47:11,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 205 [2020-10-26 20:47:11,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:11,452 INFO L225 Difference]: With dead ends: 17727 [2020-10-26 20:47:11,452 INFO L226 Difference]: Without dead ends: 12479 [2020-10-26 20:47:11,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:47:11,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12479 states. [2020-10-26 20:47:11,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12479 to 12260. [2020-10-26 20:47:11,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12260 states. [2020-10-26 20:47:11,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12260 states to 12260 states and 15355 transitions. [2020-10-26 20:47:11,859 INFO L78 Accepts]: Start accepts. Automaton has 12260 states and 15355 transitions. Word has length 205 [2020-10-26 20:47:11,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:11,860 INFO L481 AbstractCegarLoop]: Abstraction has 12260 states and 15355 transitions. [2020-10-26 20:47:11,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:47:11,860 INFO L276 IsEmpty]: Start isEmpty. Operand 12260 states and 15355 transitions. [2020-10-26 20:47:11,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-26 20:47:11,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:11,891 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:11,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:47:11,892 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:11,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:11,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1500671431, now seen corresponding path program 1 times [2020-10-26 20:47:11,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:11,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135753498] [2020-10-26 20:47:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:11,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:12,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:13,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:14,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:14,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-26 20:47:14,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:47:14,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2435 [2020-10-26 20:47:14,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:14,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:14,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-26 20:47:14,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 20:47:14,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:14,669 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:14,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:14,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:14,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:14,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:14,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:14,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:47:14,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:14,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:14,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:14,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:14,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:14,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:14,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:14,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:14,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:47:14,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:14,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 20:47:14,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:14,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:14,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:14,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 20:47:14,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:14,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 20:47:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:14,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:15,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:15,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 20:47:15,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:15,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-26 20:47:15,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:15,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:15,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:15,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 20:47:15,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:47:15,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135753498] [2020-10-26 20:47:15,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:15,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:47:15,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166757598] [2020-10-26 20:47:15,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:47:15,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:15,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:47:15,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:47:15,174 INFO L87 Difference]: Start difference. First operand 12260 states and 15355 transitions. Second operand 7 states. [2020-10-26 20:47:15,611 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:47:17,571 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:47:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:19,721 INFO L93 Difference]: Finished difference Result 31465 states and 44185 transitions. [2020-10-26 20:47:19,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:47:19,722 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 229 [2020-10-26 20:47:19,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:19,834 INFO L225 Difference]: With dead ends: 31465 [2020-10-26 20:47:19,834 INFO L226 Difference]: Without dead ends: 20274 [2020-10-26 20:47:19,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:47:19,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20274 states. [2020-10-26 20:47:20,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20274 to 19767. [2020-10-26 20:47:20,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19767 states. [2020-10-26 20:47:20,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19767 states to 19767 states and 24766 transitions. [2020-10-26 20:47:20,553 INFO L78 Accepts]: Start accepts. Automaton has 19767 states and 24766 transitions. Word has length 229 [2020-10-26 20:47:20,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:20,554 INFO L481 AbstractCegarLoop]: Abstraction has 19767 states and 24766 transitions. [2020-10-26 20:47:20,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:47:20,554 INFO L276 IsEmpty]: Start isEmpty. Operand 19767 states and 24766 transitions. [2020-10-26 20:47:20,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-26 20:47:20,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:20,605 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:20,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:47:20,606 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:20,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:20,607 INFO L82 PathProgramCache]: Analyzing trace with hash -5062323, now seen corresponding path program 1 times [2020-10-26 20:47:20,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:20,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855529938] [2020-10-26 20:47:20,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:20,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:20,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:22,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:23,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:24,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:25,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:25,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-26 20:47:25,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:47:25,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-26 20:47:25,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:25,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:47:25,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:25,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-26 20:47:25,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:26,138 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:26,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:26,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:26,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:26,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:26,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:26,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:47:26,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:26,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:26,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:26,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:26,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:26,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:26,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:26,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:26,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:47:26,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:26,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:47:26,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:26,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:26,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:26,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:47:26,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:26,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:47:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:26,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:26,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:26,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:26,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:47:26,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:47:26,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-26 20:47:26,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:26,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:26,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:26,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:47:26,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:26,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 20:47:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:26,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:26,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:26,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 20:47:26,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:26,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-26 20:47:26,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:26,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:26,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:26,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 20:47:26,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 108 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-26 20:47:26,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855529938] [2020-10-26 20:47:26,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:26,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:47:26,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257022909] [2020-10-26 20:47:26,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:47:26,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:26,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:47:26,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:47:26,810 INFO L87 Difference]: Start difference. First operand 19767 states and 24766 transitions. Second operand 8 states. [2020-10-26 20:47:27,109 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:47:29,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:29,173 INFO L93 Difference]: Finished difference Result 37231 states and 47003 transitions. [2020-10-26 20:47:29,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:47:29,173 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 249 [2020-10-26 20:47:29,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:29,228 INFO L225 Difference]: With dead ends: 37231 [2020-10-26 20:47:29,228 INFO L226 Difference]: Without dead ends: 17904 [2020-10-26 20:47:29,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:47:29,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17904 states. [2020-10-26 20:47:29,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17904 to 17864. [2020-10-26 20:47:29,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17864 states. [2020-10-26 20:47:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17864 states to 17864 states and 21751 transitions. [2020-10-26 20:47:29,674 INFO L78 Accepts]: Start accepts. Automaton has 17864 states and 21751 transitions. Word has length 249 [2020-10-26 20:47:29,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:29,675 INFO L481 AbstractCegarLoop]: Abstraction has 17864 states and 21751 transitions. [2020-10-26 20:47:29,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:47:29,675 INFO L276 IsEmpty]: Start isEmpty. Operand 17864 states and 21751 transitions. [2020-10-26 20:47:29,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-10-26 20:47:29,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:29,720 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:29,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:47:29,720 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:29,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:29,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1283622467, now seen corresponding path program 1 times [2020-10-26 20:47:29,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:29,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265169061] [2020-10-26 20:47:29,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:29,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:30,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:30,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:32,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:34,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:34,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:34,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:34,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-26 20:47:34,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 20:47:34,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 20:47:34,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:34,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:47:34,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:34,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-26 20:47:34,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:35,105 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:35,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:35,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:35,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:35,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:35,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:35,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:47:35,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:35,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:35,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:35,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:35,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:35,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:35,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:35,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:35,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 20:47:35,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:35,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-26 20:47:35,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:35,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:35,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:35,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 20:47:35,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:35,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-26 20:47:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:35,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:35,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:35,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 20:47:35,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:35,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-26 20:47:35,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:35,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:35,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:35,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 20:47:35,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:35,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 20:47:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:35,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:35,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:35,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:47:35,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:35,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:47:35,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:35,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:35,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:47:35,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:35,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 102 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:47:35,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265169061] [2020-10-26 20:47:35,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:35,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:47:35,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263285174] [2020-10-26 20:47:35,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:47:35,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:35,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:47:35,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:47:35,847 INFO L87 Difference]: Start difference. First operand 17864 states and 21751 transitions. Second operand 8 states. [2020-10-26 20:47:36,132 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:47:40,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:40,561 INFO L93 Difference]: Finished difference Result 50828 states and 68356 transitions. [2020-10-26 20:47:40,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:47:40,562 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 266 [2020-10-26 20:47:40,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:40,707 INFO L225 Difference]: With dead ends: 50828 [2020-10-26 20:47:40,708 INFO L226 Difference]: Without dead ends: 33826 [2020-10-26 20:47:40,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:47:40,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33826 states. [2020-10-26 20:47:41,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33826 to 32837. [2020-10-26 20:47:41,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32837 states. [2020-10-26 20:47:41,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32837 states to 32837 states and 40127 transitions. [2020-10-26 20:47:41,901 INFO L78 Accepts]: Start accepts. Automaton has 32837 states and 40127 transitions. Word has length 266 [2020-10-26 20:47:41,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:41,902 INFO L481 AbstractCegarLoop]: Abstraction has 32837 states and 40127 transitions. [2020-10-26 20:47:41,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:47:41,902 INFO L276 IsEmpty]: Start isEmpty. Operand 32837 states and 40127 transitions. [2020-10-26 20:47:41,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-26 20:47:41,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:41,936 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:41,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:47:41,937 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:41,937 INFO L82 PathProgramCache]: Analyzing trace with hash 732352012, now seen corresponding path program 1 times [2020-10-26 20:47:41,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:41,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658551694] [2020-10-26 20:47:41,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:42,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:42,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:43,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:44,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:47,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:47,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 20:47:47,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:47:47,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-26 20:47:47,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:47,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:47:47,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:47,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-26 20:47:47,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:47,308 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:47,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:47,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:47,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:47,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:47,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:47,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:47:47,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:47,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:47,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:47,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:47,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:47,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:47,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:47,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:47,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 20:47:47,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:47,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-26 20:47:47,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:47,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:47,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:47,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 20:47:47,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:47,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 20:47:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:47,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:47,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:47,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 20:47:47,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:47,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 20:47:47,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:47,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:47,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-26 20:47:47,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:47,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 107 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:47:47,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658551694] [2020-10-26 20:47:47,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:47,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:47:47,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251012384] [2020-10-26 20:47:47,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:47:47,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:47,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:47:47,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:47:47,761 INFO L87 Difference]: Start difference. First operand 32837 states and 40127 transitions. Second operand 7 states. [2020-10-26 20:47:48,041 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:47:52,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:52,178 INFO L93 Difference]: Finished difference Result 87435 states and 111059 transitions. [2020-10-26 20:47:52,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:47:52,185 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 273 [2020-10-26 20:47:52,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:52,392 INFO L225 Difference]: With dead ends: 87435 [2020-10-26 20:47:52,392 INFO L226 Difference]: Without dead ends: 55872 [2020-10-26 20:47:52,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:47:52,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55872 states. [2020-10-26 20:47:54,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55872 to 55334. [2020-10-26 20:47:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55334 states. [2020-10-26 20:47:54,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55334 states to 55334 states and 68447 transitions. [2020-10-26 20:47:54,156 INFO L78 Accepts]: Start accepts. Automaton has 55334 states and 68447 transitions. Word has length 273 [2020-10-26 20:47:54,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:54,156 INFO L481 AbstractCegarLoop]: Abstraction has 55334 states and 68447 transitions. [2020-10-26 20:47:54,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:47:54,157 INFO L276 IsEmpty]: Start isEmpty. Operand 55334 states and 68447 transitions. [2020-10-26 20:47:54,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-10-26 20:47:54,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:54,830 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:54,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:47:54,830 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:54,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:54,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1797140051, now seen corresponding path program 1 times [2020-10-26 20:47:54,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:54,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260444910] [2020-10-26 20:47:54,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:54,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:55,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:55,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:55,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:59,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:59,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 294 [2020-10-26 20:47:59,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:47:59,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-26 20:47:59,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:59,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:47:59,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:59,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 20:47:59,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:00,269 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:00,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:00,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:00,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:00,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:00,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:00,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:48:00,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:00,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:00,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:00,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:00,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:00,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:00,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:00,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:00,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 20:48:00,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:00,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-26 20:48:00,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:00,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:00,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:00,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 20:48:00,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:00,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-26 20:48:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:00,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:00,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:00,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:48:00,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:00,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:48:00,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:00,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:00,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:00,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:48:00,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:00,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-26 20:48:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:00,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:00,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:00,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 20:48:00,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:00,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:48:00,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:00,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:48:00,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-26 20:48:00,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:48:00,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:00,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-26 20:48:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:00,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:00,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:00,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:48:00,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:00,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:48:00,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:00,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:48:00,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:48:00,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:48:00,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 111 proven. 26 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 20:48:00,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260444910] [2020-10-26 20:48:00,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:00,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:48:00,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877533900] [2020-10-26 20:48:00,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:48:00,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:00,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:48:00,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:48:00,862 INFO L87 Difference]: Start difference. First operand 55334 states and 68447 transitions. Second operand 8 states. [2020-10-26 20:48:01,116 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:48:02,343 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:48:05,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:05,231 INFO L93 Difference]: Finished difference Result 117783 states and 147818 transitions. [2020-10-26 20:48:05,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:48:05,231 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 276 [2020-10-26 20:48:05,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:05,407 INFO L225 Difference]: With dead ends: 117783 [2020-10-26 20:48:05,407 INFO L226 Difference]: Without dead ends: 64354 [2020-10-26 20:48:05,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:48:05,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64354 states. [2020-10-26 20:48:07,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64354 to 62988. [2020-10-26 20:48:07,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62988 states. [2020-10-26 20:48:07,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62988 states to 62988 states and 78255 transitions. [2020-10-26 20:48:07,914 INFO L78 Accepts]: Start accepts. Automaton has 62988 states and 78255 transitions. Word has length 276 [2020-10-26 20:48:07,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:07,915 INFO L481 AbstractCegarLoop]: Abstraction has 62988 states and 78255 transitions. [2020-10-26 20:48:07,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:48:07,915 INFO L276 IsEmpty]: Start isEmpty. Operand 62988 states and 78255 transitions. [2020-10-26 20:48:08,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-10-26 20:48:08,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:08,261 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:48:08,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:48:08,261 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:08,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:08,262 INFO L82 PathProgramCache]: Analyzing trace with hash 657186817, now seen corresponding path program 1 times [2020-10-26 20:48:08,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:08,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767593450] [2020-10-26 20:48:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:08,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:08,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:09,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:12,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:12,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:12,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 290 [2020-10-26 20:48:12,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:48:12,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4630 [2020-10-26 20:48:12,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:12,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:48:12,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:12,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 20:48:12,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:13,243 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:13,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:13,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:13,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:13,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:13,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:13,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:48:13,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:13,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:13,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:13,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:13,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:13,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:13,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:13,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:13,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 20:48:13,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:13,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-26 20:48:13,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:13,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:13,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:13,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 20:48:13,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:13,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-26 20:48:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:13,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:13,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:13,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:48:13,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:13,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:48:13,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:13,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:48:13,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-26 20:48:13,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:48:13,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 110 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:48:13,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767593450] [2020-10-26 20:48:13,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:13,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:48:13,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534110963] [2020-10-26 20:48:13,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:48:13,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:13,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:48:13,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:48:13,791 INFO L87 Difference]: Start difference. First operand 62988 states and 78255 transitions. Second operand 7 states. [2020-10-26 20:48:14,060 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:48:15,221 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:48:17,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:17,633 INFO L93 Difference]: Finished difference Result 124591 states and 154897 transitions. [2020-10-26 20:48:17,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:48:17,633 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 276 [2020-10-26 20:48:17,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:17,799 INFO L225 Difference]: With dead ends: 124591 [2020-10-26 20:48:17,799 INFO L226 Difference]: Without dead ends: 63508 [2020-10-26 20:48:17,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:48:18,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63508 states. [2020-10-26 20:48:19,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63508 to 63000. [2020-10-26 20:48:19,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63000 states. [2020-10-26 20:48:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63000 states to 63000 states and 78239 transitions. [2020-10-26 20:48:19,729 INFO L78 Accepts]: Start accepts. Automaton has 63000 states and 78239 transitions. Word has length 276 [2020-10-26 20:48:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:19,729 INFO L481 AbstractCegarLoop]: Abstraction has 63000 states and 78239 transitions. [2020-10-26 20:48:19,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:48:19,729 INFO L276 IsEmpty]: Start isEmpty. Operand 63000 states and 78239 transitions. [2020-10-26 20:48:19,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-10-26 20:48:19,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:19,791 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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, 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] [2020-10-26 20:48:19,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:48:19,792 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:19,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:19,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1116207248, now seen corresponding path program 1 times [2020-10-26 20:48:19,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:19,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586919052] [2020-10-26 20:48:19,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:19,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:20,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:20,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:24,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:24,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 296 [2020-10-26 20:48:24,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:48:24,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5118 [2020-10-26 20:48:24,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:24,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 20:48:24,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:24,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 20:48:24,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:25,325 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:25,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:25,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:25,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:25,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:25,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:25,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:48:25,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:25,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:25,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:25,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:25,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:25,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:25,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:25,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:25,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:48:25,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:25,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-26 20:48:25,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:25,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:48:25,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:25,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:48:25,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:25,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:48:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:25,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:25,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:25,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:48:25,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:25,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 20:48:25,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:25,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:25,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:25,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:48:25,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:25,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 20:48:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:25,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:25,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:25,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:48:25,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:25,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:48:25,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:25,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:48:25,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 20:48:25,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:48:25,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:25,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-26 20:48:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:25,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:25,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:25,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 20:48:25,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:25,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 20:48:25,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:25,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:48:25,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-26 20:48:25,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:48:25,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 119 proven. 56 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 20:48:25,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586919052] [2020-10-26 20:48:25,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:25,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 20:48:25,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139250661] [2020-10-26 20:48:25,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:48:25,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:25,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:48:25,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:48:25,964 INFO L87 Difference]: Start difference. First operand 63000 states and 78239 transitions. Second operand 10 states. [2020-10-26 20:48:26,229 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:48:26,894 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 162 [2020-10-26 20:48:27,555 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 162 [2020-10-26 20:48:31,680 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 161 [2020-10-26 20:48:34,375 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 159 [2020-10-26 20:48:37,175 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:48:39,831 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:48:41,787 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:48:43,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:43,937 INFO L93 Difference]: Finished difference Result 217415 states and 297242 transitions. [2020-10-26 20:48:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 20:48:43,937 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 278 [2020-10-26 20:48:43,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:44,780 INFO L225 Difference]: With dead ends: 217415 [2020-10-26 20:48:44,780 INFO L226 Difference]: Without dead ends: 155062 [2020-10-26 20:48:44,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 20:48:44,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155062 states. [2020-10-26 20:48:48,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155062 to 150523. [2020-10-26 20:48:48,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150523 states. [2020-10-26 20:48:49,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150523 states to 150523 states and 189545 transitions. [2020-10-26 20:48:49,250 INFO L78 Accepts]: Start accepts. Automaton has 150523 states and 189545 transitions. Word has length 278 [2020-10-26 20:48:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:49,250 INFO L481 AbstractCegarLoop]: Abstraction has 150523 states and 189545 transitions. [2020-10-26 20:48:49,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:48:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 150523 states and 189545 transitions. [2020-10-26 20:48:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-26 20:48:49,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:49,326 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:48:49,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:48:49,326 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:49,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:49,327 INFO L82 PathProgramCache]: Analyzing trace with hash -502417292, now seen corresponding path program 1 times [2020-10-26 20:48:49,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:49,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555747787] [2020-10-26 20:48:49,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:49,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:49,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:52,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:52,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:54,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:54,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-26 20:48:54,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:48:54,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 20:48:54,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:54,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:48:54,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:54,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-26 20:48:54,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:54,715 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:54,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:54,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:54,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:54,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:54,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:54,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:48:54,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:54,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:54,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:54,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:54,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:54,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:54,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:54,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:54,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 20:48:54,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:54,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-26 20:48:54,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:54,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:54,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:54,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 20:48:54,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:55,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-26 20:48:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:55,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:55,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:55,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 20:48:55,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:55,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-26 20:48:55,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:55,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:55,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:55,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-26 20:48:55,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 120 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:48:55,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555747787] [2020-10-26 20:48:55,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:55,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:48:55,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797932231] [2020-10-26 20:48:55,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:48:55,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:55,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:48:55,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:48:55,483 INFO L87 Difference]: Start difference. First operand 150523 states and 189545 transitions. Second operand 8 states. [2020-10-26 20:48:55,777 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:48:56,962 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:49:01,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:01,414 INFO L93 Difference]: Finished difference Result 301688 states and 380127 transitions. [2020-10-26 20:49:01,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:49:01,414 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 285 [2020-10-26 20:49:01,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:01,981 INFO L225 Difference]: With dead ends: 301688 [2020-10-26 20:49:01,981 INFO L226 Difference]: Without dead ends: 166564 [2020-10-26 20:49:02,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-26 20:49:02,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166564 states. [2020-10-26 20:49:05,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166564 to 166312. [2020-10-26 20:49:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166312 states. [2020-10-26 20:49:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166312 states to 166312 states and 206700 transitions. [2020-10-26 20:49:06,598 INFO L78 Accepts]: Start accepts. Automaton has 166312 states and 206700 transitions. Word has length 285 [2020-10-26 20:49:06,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:06,599 INFO L481 AbstractCegarLoop]: Abstraction has 166312 states and 206700 transitions. [2020-10-26 20:49:06,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:49:06,599 INFO L276 IsEmpty]: Start isEmpty. Operand 166312 states and 206700 transitions. [2020-10-26 20:49:06,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-10-26 20:49:06,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:06,667 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:06,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 20:49:06,667 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:06,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:06,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1835011331, now seen corresponding path program 1 times [2020-10-26 20:49:06,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:06,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843310945] [2020-10-26 20:49:06,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:06,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:06,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:06,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:07,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:11,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:11,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-26 20:49:11,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:49:11,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 20:49:11,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:11,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:49:11,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:11,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 20:49:11,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:12,014 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:12,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:12,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:12,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:12,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:12,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:12,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:49:12,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:12,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:12,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:12,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:12,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:12,169 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:49:12,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:12,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:12,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:12,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:12,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:12,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:49:12,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:12,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:12,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:12,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:12,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:12,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:49:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:12,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:12,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:12,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 20:49:12,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:12,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-26 20:49:12,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:12,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:12,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:12,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 20:49:12,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:12,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-26 20:49:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:12,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:12,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:12,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:49:12,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:12,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 20:49:12,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:12,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:12,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:12,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:49:12,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:12,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:49:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:12,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:12,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:12,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 20:49:12,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:12,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 20:49:12,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:12,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:12,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-26 20:49:12,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:12,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 133 proven. 47 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-26 20:49:12,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843310945] [2020-10-26 20:49:12,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:12,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:49:12,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233530065] [2020-10-26 20:49:12,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:49:12,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:12,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:49:12,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:49:12,893 INFO L87 Difference]: Start difference. First operand 166312 states and 206700 transitions. Second operand 8 states. [2020-10-26 20:49:13,149 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:14,900 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:49:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:21,743 INFO L93 Difference]: Finished difference Result 338098 states and 445646 transitions. [2020-10-26 20:49:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 20:49:21,744 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 297 [2020-10-26 20:49:21,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:22,967 INFO L225 Difference]: With dead ends: 338098 [2020-10-26 20:49:22,967 INFO L226 Difference]: Without dead ends: 187174 [2020-10-26 20:49:23,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:49:23,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187174 states. [2020-10-26 20:49:27,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187174 to 182545. [2020-10-26 20:49:27,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182545 states.