/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:34:26,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:34:26,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:34:26,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:34:26,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:34:26,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:34:26,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:34:26,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:34:26,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:34:26,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:34:26,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:34:26,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:34:26,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:34:26,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:34:26,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:34:26,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:34:26,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:34:26,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:34:26,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:34:26,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:34:26,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:34:26,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:34:26,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:34:26,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:34:26,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:34:26,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:34:26,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:34:26,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:34:26,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:34:26,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:34:26,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:34:26,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:34:26,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:34:26,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:34:26,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:34:26,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:34:26,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:34:26,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:34:26,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:34:26,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:34:26,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:34:26,383 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 18:34:26,410 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:34:26,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:34:26,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:34:26,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:34:26,413 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:34:26,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:34:26,413 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:34:26,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:34:26,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:34:26,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:34:26,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:34:26,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:34:26,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:34:26,415 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:34:26,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:34:26,415 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:34:26,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:34:26,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:34:26,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:34:26,416 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:34:26,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:34:26,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:34:26,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:34:26,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:34:26,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:34:26,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:34:26,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:34:26,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:34:26,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:34:26,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:34:26,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:34:26,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:34:26,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:34:26,863 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:34:26,864 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:34:26,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label02.c [2020-10-27 18:34:26,952 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be45703ad/f329257d9c26454193631e9d7a785594/FLAGdfe897fb6 [2020-10-27 18:34:27,827 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:34:27,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem16_label02.c [2020-10-27 18:34:27,861 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be45703ad/f329257d9c26454193631e9d7a785594/FLAGdfe897fb6 [2020-10-27 18:34:27,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be45703ad/f329257d9c26454193631e9d7a785594 [2020-10-27 18:34:27,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:34:27,984 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:34:27,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:34:27,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:34:27,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:34:27,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:34:27" (1/1) ... [2020-10-27 18:34:28,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dee31a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:27, skipping insertion in model container [2020-10-27 18:34:28,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:34:27" (1/1) ... [2020-10-27 18:34:28,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:34:28,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:34:28,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:34:28,900 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:34:29,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:34:29,156 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:34:29,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:29 WrapperNode [2020-10-27 18:34:29,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:34:29,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:34:29,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:34:29,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:34:29,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:29" (1/1) ... [2020-10-27 18:34:29,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:29" (1/1) ... [2020-10-27 18:34:29,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:29" (1/1) ... [2020-10-27 18:34:29,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:29" (1/1) ... [2020-10-27 18:34:29,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:29" (1/1) ... [2020-10-27 18:34:29,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:29" (1/1) ... [2020-10-27 18:34:29,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:29" (1/1) ... [2020-10-27 18:34:29,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:34:29,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:34:29,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:34:29,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:34:29,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:34:29,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:34:29,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:34:29,488 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:34:29,488 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:34:29,488 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:34:29,489 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:34:29,489 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:34:29,489 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:34:29,489 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:34:29,489 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:34:29,490 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:34:29,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:34:29,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:34:29,490 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:34:29,490 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:34:29,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:34:29,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:34:29,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:34:29,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:34:29,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:34:29,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:34:32,207 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:34:32,208 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:34:32,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:34:32 BoogieIcfgContainer [2020-10-27 18:34:32,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:34:32,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:34:32,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:34:32,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:34:32,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:34:27" (1/3) ... [2020-10-27 18:34:32,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30622af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:34:32, skipping insertion in model container [2020-10-27 18:34:32,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:29" (2/3) ... [2020-10-27 18:34:32,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30622af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:34:32, skipping insertion in model container [2020-10-27 18:34:32,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:34:32" (3/3) ... [2020-10-27 18:34:32,229 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label02.c [2020-10-27 18:34:32,243 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:34:32,249 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:34:32,263 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:34:32,314 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:34:32,314 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:34:32,315 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:34:32,315 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:34:32,315 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:34:32,315 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:34:32,315 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:34:32,315 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:34:32,357 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states. [2020-10-27 18:34:32,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 18:34:32,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:32,372 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] [2020-10-27 18:34:32,373 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:32,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:32,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1958562012, now seen corresponding path program 1 times [2020-10-27 18:34:32,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:32,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221619089] [2020-10-27 18:34:32,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:32,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:33,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:33,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 18:34:33,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:33,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 584 [2020-10-27 18:34:33,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:33,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:34:33,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:34:33,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:34:33,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:34:33,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:34:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:33,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:33,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:33,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:34:33,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:33,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 18:34:33,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:33,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:34:33,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:33,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:34:33,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:34:33,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221619089] [2020-10-27 18:34:33,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:34:33,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 18:34:33,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353898582] [2020-10-27 18:34:33,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:34:33,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:34:33,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:34:33,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:34:33,472 INFO L87 Difference]: Start difference. First operand 413 states. Second operand 5 states. [2020-10-27 18:34:40,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:34:40,248 INFO L93 Difference]: Finished difference Result 1520 states and 2853 transitions. [2020-10-27 18:34:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 18:34:40,250 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-27 18:34:40,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:34:40,277 INFO L225 Difference]: With dead ends: 1520 [2020-10-27 18:34:40,277 INFO L226 Difference]: Without dead ends: 1039 [2020-10-27 18:34:40,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:34:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2020-10-27 18:34:40,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1032. [2020-10-27 18:34:40,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-10-27 18:34:40,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1630 transitions. [2020-10-27 18:34:40,428 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1630 transitions. Word has length 68 [2020-10-27 18:34:40,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:34:40,429 INFO L481 AbstractCegarLoop]: Abstraction has 1032 states and 1630 transitions. [2020-10-27 18:34:40,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:34:40,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1630 transitions. [2020-10-27 18:34:40,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-27 18:34:40,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:40,436 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:34:40,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:34:40,437 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:40,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:40,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1274026, now seen corresponding path program 1 times [2020-10-27 18:34:40,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:40,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004468234] [2020-10-27 18:34:40,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:40,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:40,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:41,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:41,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:41,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-27 18:34:41,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:34:41,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1334 [2020-10-27 18:34:41,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:41,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:34:41,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 18:34:41,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 18:34:41,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:34:42,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:34:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:42,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:42,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:42,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:34:42,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:42,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 18:34:42,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:42,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:42,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:42,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:42,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:34:42,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:34:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:42,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:42,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:42,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 18:34:42,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:42,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-27 18:34:42,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:42,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:34:42,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:42,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 18:34:42,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:34:42,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004468234] [2020-10-27 18:34:42,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:34:42,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:34:42,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543974682] [2020-10-27 18:34:42,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:34:42,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:34:42,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:34:42,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:34:42,387 INFO L87 Difference]: Start difference. First operand 1032 states and 1630 transitions. Second operand 5 states. [2020-10-27 18:34:45,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:34:45,614 INFO L93 Difference]: Finished difference Result 2129 states and 3339 transitions. [2020-10-27 18:34:45,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:34:45,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2020-10-27 18:34:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:34:45,623 INFO L225 Difference]: With dead ends: 2129 [2020-10-27 18:34:45,623 INFO L226 Difference]: Without dead ends: 1039 [2020-10-27 18:34:45,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:34:45,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2020-10-27 18:34:45,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1032. [2020-10-27 18:34:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-10-27 18:34:45,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1456 transitions. [2020-10-27 18:34:45,686 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1456 transitions. Word has length 143 [2020-10-27 18:34:45,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:34:45,687 INFO L481 AbstractCegarLoop]: Abstraction has 1032 states and 1456 transitions. [2020-10-27 18:34:45,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:34:45,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1456 transitions. [2020-10-27 18:34:45,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 18:34:45,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:45,699 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:34:45,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:34:45,700 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:45,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:45,701 INFO L82 PathProgramCache]: Analyzing trace with hash -584781994, now seen corresponding path program 1 times [2020-10-27 18:34:45,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:45,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041213501] [2020-10-27 18:34:45,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:45,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:46,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:46,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:47,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:47,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 18:34:47,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:34:47,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1942 [2020-10-27 18:34:47,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:47,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:34:47,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-27 18:34:47,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 18:34:47,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:47,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:34:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:47,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:47,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:47,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:34:47,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:47,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 18:34:47,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:47,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:47,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:47,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:47,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:47,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:34:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:47,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:48,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:48,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 18:34:48,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:48,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-27 18:34:48,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:48,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:34:48,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:48,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 18:34:48,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:34:48,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041213501] [2020-10-27 18:34:48,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:34:48,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:34:48,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215707600] [2020-10-27 18:34:48,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:34:48,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:34:48,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:34:48,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:34:48,176 INFO L87 Difference]: Start difference. First operand 1032 states and 1456 transitions. Second operand 5 states. [2020-10-27 18:34:52,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:34:52,323 INFO L93 Difference]: Finished difference Result 3088 states and 4407 transitions. [2020-10-27 18:34:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:34:52,324 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-10-27 18:34:52,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:34:52,337 INFO L225 Difference]: With dead ends: 3088 [2020-10-27 18:34:52,337 INFO L226 Difference]: Without dead ends: 2062 [2020-10-27 18:34:52,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:34:52,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2020-10-27 18:34:52,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 2058. [2020-10-27 18:34:52,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2058 states. [2020-10-27 18:34:52,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 2849 transitions. [2020-10-27 18:34:52,404 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 2849 transitions. Word has length 153 [2020-10-27 18:34:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:34:52,405 INFO L481 AbstractCegarLoop]: Abstraction has 2058 states and 2849 transitions. [2020-10-27 18:34:52,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:34:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 2849 transitions. [2020-10-27 18:34:52,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-27 18:34:52,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:52,409 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:34:52,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:34:52,409 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:52,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:52,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1327762402, now seen corresponding path program 1 times [2020-10-27 18:34:52,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:52,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948959563] [2020-10-27 18:34:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:52,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:52,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:52,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-27 18:34:52,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:52,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-10-27 18:34:52,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:52,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:34:52,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:34:52,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-27 18:34:52,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:52,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:34:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:52,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:52,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:52,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:34:52,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:52,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 18:34:52,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:52,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:34:52,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:52,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:34:52,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:52,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:34:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:53,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:53,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:53,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 18:34:53,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:53,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-27 18:34:53,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:53,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:34:53,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:34:53,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 18:34:53,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:34:53,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948959563] [2020-10-27 18:34:53,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:34:53,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 18:34:53,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146231436] [2020-10-27 18:34:53,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:34:53,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:34:53,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:34:53,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:34:53,368 INFO L87 Difference]: Start difference. First operand 2058 states and 2849 transitions. Second operand 7 states. [2020-10-27 18:34:57,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:34:57,140 INFO L93 Difference]: Finished difference Result 4833 states and 6652 transitions. [2020-10-27 18:34:57,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:34:57,142 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 179 [2020-10-27 18:34:57,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:34:57,163 INFO L225 Difference]: With dead ends: 4833 [2020-10-27 18:34:57,163 INFO L226 Difference]: Without dead ends: 2781 [2020-10-27 18:34:57,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 18:34:57,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2020-10-27 18:34:57,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2759. [2020-10-27 18:34:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2759 states. [2020-10-27 18:34:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2759 states to 2759 states and 3671 transitions. [2020-10-27 18:34:57,278 INFO L78 Accepts]: Start accepts. Automaton has 2759 states and 3671 transitions. Word has length 179 [2020-10-27 18:34:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:34:57,279 INFO L481 AbstractCegarLoop]: Abstraction has 2759 states and 3671 transitions. [2020-10-27 18:34:57,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:34:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2759 states and 3671 transitions. [2020-10-27 18:34:57,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-27 18:34:57,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:57,284 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, 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] [2020-10-27 18:34:57,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:34:57,285 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:57,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:57,286 INFO L82 PathProgramCache]: Analyzing trace with hash 965193982, now seen corresponding path program 1 times [2020-10-27 18:34:57,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:57,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514066613] [2020-10-27 18:34:57,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:57,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:57,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:57,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:57,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:59,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:02,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:02,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-27 18:35:02,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:35:02,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 18:35:02,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:02,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:02,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 189 [2020-10-27 18:35:02,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 18:35:02,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:02,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:35:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:02,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:02,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:02,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:35:02,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:02,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 18:35:02,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:02,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:02,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:02,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:02,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:02,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:35:02,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:02,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:02,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:02,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 18:35:02,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:02,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 18:35:02,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:02,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:02,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:02,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:02,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:02,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-10-27 18:35:02,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:02,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:02,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:02,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 18:35:02,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:02,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-27 18:35:02,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:02,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:35:02,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:02,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 18:35:02,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 121 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-27 18:35:02,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514066613] [2020-10-27 18:35:02,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:35:02,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:35:02,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472436561] [2020-10-27 18:35:02,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:35:02,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:35:02,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:35:02,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:35:02,811 INFO L87 Difference]: Start difference. First operand 2759 states and 3671 transitions. Second operand 5 states. [2020-10-27 18:35:07,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:35:07,041 INFO L93 Difference]: Finished difference Result 6892 states and 9496 transitions. [2020-10-27 18:35:07,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:35:07,043 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 245 [2020-10-27 18:35:07,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:35:07,069 INFO L225 Difference]: With dead ends: 6892 [2020-10-27 18:35:07,069 INFO L226 Difference]: Without dead ends: 4139 [2020-10-27 18:35:07,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:35:07,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2020-10-27 18:35:07,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 4133. [2020-10-27 18:35:07,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4133 states. [2020-10-27 18:35:07,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 5503 transitions. [2020-10-27 18:35:07,255 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 5503 transitions. Word has length 245 [2020-10-27 18:35:07,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:35:07,256 INFO L481 AbstractCegarLoop]: Abstraction has 4133 states and 5503 transitions. [2020-10-27 18:35:07,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:35:07,256 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 5503 transitions. [2020-10-27 18:35:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-27 18:35:07,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:35:07,262 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:35:07,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:35:07,263 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:35:07,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:35:07,263 INFO L82 PathProgramCache]: Analyzing trace with hash -319634862, now seen corresponding path program 1 times [2020-10-27 18:35:07,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:35:07,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410191421] [2020-10-27 18:35:07,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:35:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:07,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:08,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:08,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-27 18:35:08,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:08,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 667 [2020-10-27 18:35:08,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:08,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:35:08,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:35:08,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 189 [2020-10-27 18:35:08,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:08,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:35:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:08,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:08,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:08,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:35:08,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:08,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 18:35:08,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:08,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:35:08,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:08,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:35:08,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:08,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:35:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:08,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:08,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:08,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-27 18:35:08,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:08,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-27 18:35:08,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:08,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:08,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:35:08,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-27 18:35:08,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:35:08,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410191421] [2020-10-27 18:35:08,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:35:08,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 18:35:08,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581262502] [2020-10-27 18:35:08,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:35:08,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:35:08,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:35:08,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:35:08,826 INFO L87 Difference]: Start difference. First operand 4133 states and 5503 transitions. Second operand 7 states. [2020-10-27 18:35:13,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:35:13,306 INFO L93 Difference]: Finished difference Result 11441 states and 15910 transitions. [2020-10-27 18:35:13,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:35:13,308 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 251 [2020-10-27 18:35:13,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:35:13,350 INFO L225 Difference]: With dead ends: 11441 [2020-10-27 18:35:13,350 INFO L226 Difference]: Without dead ends: 7314 [2020-10-27 18:35:13,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-27 18:35:13,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7314 states. [2020-10-27 18:35:13,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7314 to 7261. [2020-10-27 18:35:13,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7261 states. [2020-10-27 18:35:13,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7261 states to 7261 states and 9288 transitions. [2020-10-27 18:35:13,585 INFO L78 Accepts]: Start accepts. Automaton has 7261 states and 9288 transitions. Word has length 251 [2020-10-27 18:35:13,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:35:13,585 INFO L481 AbstractCegarLoop]: Abstraction has 7261 states and 9288 transitions. [2020-10-27 18:35:13,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:35:13,585 INFO L276 IsEmpty]: Start isEmpty. Operand 7261 states and 9288 transitions. [2020-10-27 18:35:13,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-10-27 18:35:13,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:35:13,594 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:35:13,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:35:13,594 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:35:13,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:35:13,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1352310444, now seen corresponding path program 1 times [2020-10-27 18:35:13,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:35:13,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977104921] [2020-10-27 18:35:13,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:35:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:13,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:13,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:16,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:16,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 344 [2020-10-27 18:35:16,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:35:16,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3098 [2020-10-27 18:35:16,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:16,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 18:35:16,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:35:16,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 253 [2020-10-27 18:35:16,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:17,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:35:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:17,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:17,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:17,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:35:17,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:17,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 18:35:17,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:17,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:35:17,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:17,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:35:17,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:17,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:35:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:17,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:17,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:18,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:18,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-27 18:35:18,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:35:18,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1635 [2020-10-27 18:35:18,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:18,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:18,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:35:18,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 265 [2020-10-27 18:35:18,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:35:19,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977104921] [2020-10-27 18:35:19,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:35:19,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 18:35:19,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128219913] [2020-10-27 18:35:19,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:35:19,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:35:19,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:35:19,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:35:19,280 INFO L87 Difference]: Start difference. First operand 7261 states and 9288 transitions. Second operand 8 states. [2020-10-27 18:35:19,554 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 18:35:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:35:26,400 INFO L93 Difference]: Finished difference Result 15685 states and 20730 transitions. [2020-10-27 18:35:26,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:35:26,404 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 332 [2020-10-27 18:35:26,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:35:26,450 INFO L225 Difference]: With dead ends: 15685 [2020-10-27 18:35:26,451 INFO L226 Difference]: Without dead ends: 8430 [2020-10-27 18:35:26,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:35:26,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8430 states. [2020-10-27 18:35:26,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8430 to 8323. [2020-10-27 18:35:26,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8323 states. [2020-10-27 18:35:26,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8323 states to 8323 states and 10575 transitions. [2020-10-27 18:35:26,718 INFO L78 Accepts]: Start accepts. Automaton has 8323 states and 10575 transitions. Word has length 332 [2020-10-27 18:35:26,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:35:26,719 INFO L481 AbstractCegarLoop]: Abstraction has 8323 states and 10575 transitions. [2020-10-27 18:35:26,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:35:26,720 INFO L276 IsEmpty]: Start isEmpty. Operand 8323 states and 10575 transitions. [2020-10-27 18:35:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-10-27 18:35:26,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:35:26,734 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:35:26,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:35:26,734 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:35:26,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:35:26,735 INFO L82 PathProgramCache]: Analyzing trace with hash 806191316, now seen corresponding path program 1 times [2020-10-27 18:35:26,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:35:26,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443919895] [2020-10-27 18:35:26,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:35:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:26,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:27,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:29,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:29,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:30,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:30,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 504 [2020-10-27 18:35:30,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:35:30,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3821 [2020-10-27 18:35:30,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:30,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 18:35:30,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 249 [2020-10-27 18:35:30,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 251 [2020-10-27 18:35:30,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:30,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:35:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:30,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:30,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:30,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:35:30,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:30,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:35:30,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:30,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:30,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:30,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:30,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:30,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:35:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:31,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:31,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:31,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-27 18:35:31,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:31,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-27 18:35:31,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:31,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:35:31,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:31,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 234 [2020-10-27 18:35:31,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:31,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-10-27 18:35:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:31,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:31,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:31,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-27 18:35:31,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:31,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-27 18:35:31,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:31,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 18:35:31,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:35:31,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-27 18:35:31,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 238 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:35:32,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443919895] [2020-10-27 18:35:32,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:35:32,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 18:35:32,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467304513] [2020-10-27 18:35:32,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:35:32,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:35:32,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:35:32,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:35:32,228 INFO L87 Difference]: Start difference. First operand 8323 states and 10575 transitions. Second operand 8 states. [2020-10-27 18:35:34,280 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-10-27 18:35:42,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:35:42,661 INFO L93 Difference]: Finished difference Result 20777 states and 27073 transitions. [2020-10-27 18:35:42,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 18:35:42,662 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 490 [2020-10-27 18:35:42,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:35:42,722 INFO L225 Difference]: With dead ends: 20777 [2020-10-27 18:35:42,722 INFO L226 Difference]: Without dead ends: 12801 [2020-10-27 18:35:42,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-27 18:35:42,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12801 states. [2020-10-27 18:35:43,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12801 to 12777. [2020-10-27 18:35:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12777 states. [2020-10-27 18:35:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12777 states to 12777 states and 16162 transitions. [2020-10-27 18:35:43,127 INFO L78 Accepts]: Start accepts. Automaton has 12777 states and 16162 transitions. Word has length 490 [2020-10-27 18:35:43,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:35:43,129 INFO L481 AbstractCegarLoop]: Abstraction has 12777 states and 16162 transitions. [2020-10-27 18:35:43,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:35:43,129 INFO L276 IsEmpty]: Start isEmpty. Operand 12777 states and 16162 transitions. [2020-10-27 18:35:43,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2020-10-27 18:35:43,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:35:43,147 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:35:43,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:35:43,147 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:35:43,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:35:43,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1468141050, now seen corresponding path program 1 times [2020-10-27 18:35:43,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:35:43,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730360555] [2020-10-27 18:35:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:35:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:43,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:43,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:45,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:48,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:48,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 563 [2020-10-27 18:35:48,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:35:48,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-27 18:35:48,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:48,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:35:48,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 380 [2020-10-27 18:35:48,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-10-27 18:35:48,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:48,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:35:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:48,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:48,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:48,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:35:48,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:48,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:35:48,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:48,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:48,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:48,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:48,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:48,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:35:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:48,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:48,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:48,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-27 18:35:48,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:48,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-27 18:35:48,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:48,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:48,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:48,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:48,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:48,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-10-27 18:35:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:48,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:48,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:48,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 18:35:48,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:48,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-27 18:35:48,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:48,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:35:48,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:48,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 18:35:48,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:48,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2020-10-27 18:35:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:48,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:49,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:49,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:49,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 18:35:49,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:35:49,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-27 18:35:49,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:49,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:49,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:35:49,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 18:35:49,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 338 proven. 61 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-27 18:35:49,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730360555] [2020-10-27 18:35:49,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:35:49,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:35:49,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750831344] [2020-10-27 18:35:49,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:35:49,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:35:49,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:35:49,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:35:49,413 INFO L87 Difference]: Start difference. First operand 12777 states and 16162 transitions. Second operand 7 states. [2020-10-27 18:35:56,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:35:56,110 INFO L93 Difference]: Finished difference Result 27633 states and 36102 transitions. [2020-10-27 18:35:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:35:56,112 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 547 [2020-10-27 18:35:56,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:35:56,191 INFO L225 Difference]: With dead ends: 27633 [2020-10-27 18:35:56,192 INFO L226 Difference]: Without dead ends: 15199 [2020-10-27 18:35:56,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-27 18:35:56,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15199 states. [2020-10-27 18:35:56,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15199 to 15154. [2020-10-27 18:35:56,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15154 states. [2020-10-27 18:35:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15154 states to 15154 states and 18875 transitions. [2020-10-27 18:35:56,754 INFO L78 Accepts]: Start accepts. Automaton has 15154 states and 18875 transitions. Word has length 547 [2020-10-27 18:35:56,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:35:56,755 INFO L481 AbstractCegarLoop]: Abstraction has 15154 states and 18875 transitions. [2020-10-27 18:35:56,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:35:56,755 INFO L276 IsEmpty]: Start isEmpty. Operand 15154 states and 18875 transitions. [2020-10-27 18:35:56,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2020-10-27 18:35:56,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:35:56,779 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:35:56,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:35:56,780 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:35:56,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:35:56,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1751415702, now seen corresponding path program 1 times [2020-10-27 18:35:56,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:35:56,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033636731] [2020-10-27 18:35:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:35:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:57,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:57,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:59,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:59,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 585 [2020-10-27 18:35:59,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:35:59,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2209 [2020-10-27 18:35:59,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:59,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:59,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 249 [2020-10-27 18:35:59,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 267 [2020-10-27 18:35:59,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:59,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:35:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:59,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:59,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:59,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:35:59,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:59,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 18:35:59,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:59,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:59,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:59,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:59,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:59,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:35:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:59,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:59,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:59,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-27 18:35:59,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:59,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-27 18:35:59,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:59,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:35:59,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:59,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 234 [2020-10-27 18:35:59,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:59,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-10-27 18:35:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:59,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:00,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:00,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-27 18:36:00,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:00,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-10-27 18:36:00,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:00,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:36:00,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:36:00,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 265 [2020-10-27 18:36:00,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 356 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:36:00,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033636731] [2020-10-27 18:36:00,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:36:00,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:36:00,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923359387] [2020-10-27 18:36:00,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:36:00,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:36:00,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:36:00,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:36:00,545 INFO L87 Difference]: Start difference. First operand 15154 states and 18875 transitions. Second operand 7 states. [2020-10-27 18:36:07,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:36:07,875 INFO L93 Difference]: Finished difference Result 34402 states and 43414 transitions. [2020-10-27 18:36:07,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:36:07,876 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 571 [2020-10-27 18:36:07,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:36:07,952 INFO L225 Difference]: With dead ends: 34402 [2020-10-27 18:36:07,952 INFO L226 Difference]: Without dead ends: 19591 [2020-10-27 18:36:07,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:36:08,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19591 states. [2020-10-27 18:36:08,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19591 to 19241. [2020-10-27 18:36:08,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19241 states. [2020-10-27 18:36:08,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19241 states to 19241 states and 23754 transitions. [2020-10-27 18:36:08,523 INFO L78 Accepts]: Start accepts. Automaton has 19241 states and 23754 transitions. Word has length 571 [2020-10-27 18:36:08,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:36:08,525 INFO L481 AbstractCegarLoop]: Abstraction has 19241 states and 23754 transitions. [2020-10-27 18:36:08,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:36:08,525 INFO L276 IsEmpty]: Start isEmpty. Operand 19241 states and 23754 transitions. [2020-10-27 18:36:08,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2020-10-27 18:36:08,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:36:08,542 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:36:08,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 18:36:08,543 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:36:08,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:36:08,544 INFO L82 PathProgramCache]: Analyzing trace with hash -414690470, now seen corresponding path program 1 times [2020-10-27 18:36:08,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:36:08,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218935434] [2020-10-27 18:36:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:36:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:08,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:09,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:11,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:11,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 593 [2020-10-27 18:36:11,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:36:11,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2448 [2020-10-27 18:36:11,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:11,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:36:11,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 257 [2020-10-27 18:36:11,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 267 [2020-10-27 18:36:11,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:11,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:36:11,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:11,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:11,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:11,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:36:11,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:11,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:36:11,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:11,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:11,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:11,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:11,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:11,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:36:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:11,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:11,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:11,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-27 18:36:11,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:11,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-27 18:36:11,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:11,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:36:11,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:11,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 242 [2020-10-27 18:36:11,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:11,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-27 18:36:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:11,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:12,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:12,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-27 18:36:12,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:12,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-27 18:36:12,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:12,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:36:12,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:36:12,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 265 [2020-10-27 18:36:12,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 364 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:36:12,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218935434] [2020-10-27 18:36:12,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:36:12,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 18:36:12,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618342859] [2020-10-27 18:36:12,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:36:12,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:36:12,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:36:12,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:36:12,823 INFO L87 Difference]: Start difference. First operand 19241 states and 23754 transitions. Second operand 8 states. [2020-10-27 18:36:18,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:36:18,427 INFO L93 Difference]: Finished difference Result 38169 states and 47258 transitions. [2020-10-27 18:36:18,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 18:36:18,428 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 579 [2020-10-27 18:36:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:36:18,499 INFO L225 Difference]: With dead ends: 38169 [2020-10-27 18:36:18,499 INFO L226 Difference]: Without dead ends: 19271 [2020-10-27 18:36:18,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 18:36:18,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19271 states. [2020-10-27 18:36:18,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19271 to 19255. [2020-10-27 18:36:18,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19255 states. [2020-10-27 18:36:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19255 states to 19255 states and 23804 transitions. [2020-10-27 18:36:19,159 INFO L78 Accepts]: Start accepts. Automaton has 19255 states and 23804 transitions. Word has length 579 [2020-10-27 18:36:19,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:36:19,160 INFO L481 AbstractCegarLoop]: Abstraction has 19255 states and 23804 transitions. [2020-10-27 18:36:19,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:36:19,160 INFO L276 IsEmpty]: Start isEmpty. Operand 19255 states and 23804 transitions. [2020-10-27 18:36:19,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2020-10-27 18:36:19,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:36:19,173 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:36:19,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 18:36:19,174 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:36:19,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:36:19,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1978263626, now seen corresponding path program 1 times [2020-10-27 18:36:19,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:36:19,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794913352] [2020-10-27 18:36:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:36:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:19,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:20,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:20,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:20,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 601 [2020-10-27 18:36:20,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:36:20,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1320 [2020-10-27 18:36:20,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:20,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 18:36:20,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 257 [2020-10-27 18:36:20,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 338 [2020-10-27 18:36:20,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:20,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:36:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:20,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:20,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:20,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:36:20,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:20,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 18:36:20,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:20,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:20,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:20,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:20,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:20,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:36:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:20,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:21,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:21,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-27 18:36:21,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:21,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-27 18:36:21,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:21,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:36:21,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:21,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 242 [2020-10-27 18:36:21,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:21,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-27 18:36:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:21,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:21,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:21,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-27 18:36:21,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:21,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-27 18:36:21,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 18:36:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:36:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 273 [2020-10-27 18:36:21,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 308 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:36:22,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794913352] [2020-10-27 18:36:22,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:36:22,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 18:36:22,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76038406] [2020-10-27 18:36:22,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:36:22,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:36:22,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:36:22,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:36:22,151 INFO L87 Difference]: Start difference. First operand 19255 states and 23804 transitions. Second operand 8 states. [2020-10-27 18:36:29,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:36:29,756 INFO L93 Difference]: Finished difference Result 42729 states and 53446 transitions. [2020-10-27 18:36:29,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:36:29,757 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 587 [2020-10-27 18:36:29,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:36:29,832 INFO L225 Difference]: With dead ends: 42729 [2020-10-27 18:36:29,832 INFO L226 Difference]: Without dead ends: 23693 [2020-10-27 18:36:29,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:36:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23693 states. [2020-10-27 18:36:30,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23693 to 23676. [2020-10-27 18:36:30,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23676 states. [2020-10-27 18:36:30,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23676 states to 23676 states and 29641 transitions. [2020-10-27 18:36:30,466 INFO L78 Accepts]: Start accepts. Automaton has 23676 states and 29641 transitions. Word has length 587 [2020-10-27 18:36:30,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:36:30,467 INFO L481 AbstractCegarLoop]: Abstraction has 23676 states and 29641 transitions. [2020-10-27 18:36:30,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:36:30,467 INFO L276 IsEmpty]: Start isEmpty. Operand 23676 states and 29641 transitions. [2020-10-27 18:36:30,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2020-10-27 18:36:30,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:36:30,493 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:36:30,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 18:36:30,494 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:36:30,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:36:30,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1991855066, now seen corresponding path program 1 times [2020-10-27 18:36:30,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:36:30,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927471649] [2020-10-27 18:36:30,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:36:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:30,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:31,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:32,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:34,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:34,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 685 [2020-10-27 18:36:34,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:36:34,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3569 [2020-10-27 18:36:34,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:34,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 18:36:34,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 414 [2020-10-27 18:36:34,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 265 [2020-10-27 18:36:34,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:34,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:36:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:34,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:34,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:34,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:36:34,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:34,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:36:34,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:34,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:34,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:34,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:34,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:34,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:36:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:34,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:34,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:34,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-27 18:36:34,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:34,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-27 18:36:34,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:34,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:34,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:34,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:34,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:34,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-10-27 18:36:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:34,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:34,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:34,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-27 18:36:34,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:34,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-27 18:36:34,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:34,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:36:34,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:34,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-27 18:36:34,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:34,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2020-10-27 18:36:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:34,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:35,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:35,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-27 18:36:35,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:35,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-10-27 18:36:35,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:35,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 18:36:35,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:36:35,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 200 [2020-10-27 18:36:35,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:35,782 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 484 proven. 59 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-27 18:36:35,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927471649] [2020-10-27 18:36:35,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:36:35,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 18:36:35,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221316451] [2020-10-27 18:36:35,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:36:35,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:36:35,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:36:35,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:36:35,784 INFO L87 Difference]: Start difference. First operand 23676 states and 29641 transitions. Second operand 8 states. [2020-10-27 18:36:42,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:36:42,604 INFO L93 Difference]: Finished difference Result 51726 states and 65497 transitions. [2020-10-27 18:36:42,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:36:42,606 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 669 [2020-10-27 18:36:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:36:42,692 INFO L225 Difference]: With dead ends: 51726 [2020-10-27 18:36:42,692 INFO L226 Difference]: Without dead ends: 28123 [2020-10-27 18:36:42,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:36:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28123 states. [2020-10-27 18:36:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28123 to 28097. [2020-10-27 18:36:43,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28097 states. [2020-10-27 18:36:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28097 states to 28097 states and 35637 transitions. [2020-10-27 18:36:43,399 INFO L78 Accepts]: Start accepts. Automaton has 28097 states and 35637 transitions. Word has length 669 [2020-10-27 18:36:43,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:36:43,399 INFO L481 AbstractCegarLoop]: Abstraction has 28097 states and 35637 transitions. [2020-10-27 18:36:43,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:36:43,400 INFO L276 IsEmpty]: Start isEmpty. Operand 28097 states and 35637 transitions. [2020-10-27 18:36:43,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 723 [2020-10-27 18:36:43,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:36:43,434 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-27 18:36:43,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 18:36:43,434 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:36:43,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:36:43,435 INFO L82 PathProgramCache]: Analyzing trace with hash -947493040, now seen corresponding path program 1 times [2020-10-27 18:36:43,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:36:43,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621344087] [2020-10-27 18:36:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:36:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:43,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:43,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:45,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:45,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:46,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:48,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:48,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 740 [2020-10-27 18:36:48,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:36:48,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 18:36:48,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:48,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:36:48,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 670 [2020-10-27 18:36:48,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 18:36:48,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:48,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:36:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:48,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:48,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:48,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:36:48,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:48,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:36:48,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:48,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:48,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:48,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:48,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:48,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:36:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:48,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:48,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:48,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-27 18:36:48,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:48,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-27 18:36:48,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:48,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:48,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:48,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:48,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:49,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-10-27 18:36:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:49,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:49,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:49,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 18:36:49,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:49,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 18:36:49,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:49,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:49,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:49,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:49,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:49,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2020-10-27 18:36:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:49,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:49,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:49,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 18:36:49,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:49,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 18:36:49,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:49,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:49,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:49,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:49,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:49,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 491 [2020-10-27 18:36:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:49,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:49,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:49,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-27 18:36:49,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:49,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-27 18:36:49,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:49,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:36:49,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:49,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 166 [2020-10-27 18:36:49,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 245 proven. 4 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2020-10-27 18:36:50,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621344087] [2020-10-27 18:36:50,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:36:50,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:36:50,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833244719] [2020-10-27 18:36:50,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:36:50,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:36:50,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:36:50,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:36:50,121 INFO L87 Difference]: Start difference. First operand 28097 states and 35637 transitions. Second operand 5 states. [2020-10-27 18:36:53,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:36:53,506 INFO L93 Difference]: Finished difference Result 55547 states and 70566 transitions. [2020-10-27 18:36:53,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:36:53,508 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 722 [2020-10-27 18:36:53,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:36:53,604 INFO L225 Difference]: With dead ends: 55547 [2020-10-27 18:36:53,604 INFO L226 Difference]: Without dead ends: 27765 [2020-10-27 18:36:53,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:36:53,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27765 states. [2020-10-27 18:36:54,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27765 to 27758. [2020-10-27 18:36:54,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27758 states. [2020-10-27 18:36:54,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27758 states to 27758 states and 35169 transitions. [2020-10-27 18:36:54,403 INFO L78 Accepts]: Start accepts. Automaton has 27758 states and 35169 transitions. Word has length 722 [2020-10-27 18:36:54,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:36:54,404 INFO L481 AbstractCegarLoop]: Abstraction has 27758 states and 35169 transitions. [2020-10-27 18:36:54,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:36:54,404 INFO L276 IsEmpty]: Start isEmpty. Operand 27758 states and 35169 transitions. [2020-10-27 18:36:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2020-10-27 18:36:54,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:36:54,454 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:36:54,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 18:36:54,455 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:36:54,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:36:54,456 INFO L82 PathProgramCache]: Analyzing trace with hash -981525634, now seen corresponding path program 1 times [2020-10-27 18:36:54,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:36:54,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463277006] [2020-10-27 18:36:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:36:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:54,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:55,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:56,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:56,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 763 [2020-10-27 18:36:56,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:36:56,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2099 [2020-10-27 18:36:56,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:56,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:36:56,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 414 [2020-10-27 18:36:56,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 280 [2020-10-27 18:36:56,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:56,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:36:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:56,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:56,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:56,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:36:56,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:56,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 18:36:56,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:56,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:56,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:56,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:56,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:56,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:36:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:56,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:56,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:56,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-27 18:36:56,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:56,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-27 18:36:56,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:56,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:56,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:56,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:56,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:57,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-10-27 18:36:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:57,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:57,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:57,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-27 18:36:57,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:57,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-27 18:36:57,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:57,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:36:57,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:57,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-27 18:36:57,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:57,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2020-10-27 18:36:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:57,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:57,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:57,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-27 18:36:57,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:57,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-27 18:36:57,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:57,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:36:57,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:36:57,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 278 [2020-10-27 18:36:57,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 581 proven. 2 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-27 18:36:58,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463277006] [2020-10-27 18:36:58,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:36:58,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:36:58,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110510748] [2020-10-27 18:36:58,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:36:58,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:36:58,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:36:58,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:36:58,289 INFO L87 Difference]: Start difference. First operand 27758 states and 35169 transitions. Second operand 7 states. [2020-10-27 18:37:03,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:37:03,800 INFO L93 Difference]: Finished difference Result 55280 states and 70547 transitions. [2020-10-27 18:37:03,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:37:03,801 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 747 [2020-10-27 18:37:03,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:37:03,890 INFO L225 Difference]: With dead ends: 55280 [2020-10-27 18:37:03,891 INFO L226 Difference]: Without dead ends: 27865 [2020-10-27 18:37:03,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:37:03,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27865 states. [2020-10-27 18:37:04,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27865 to 27133. [2020-10-27 18:37:04,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27133 states. [2020-10-27 18:37:04,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27133 states to 27133 states and 32593 transitions. [2020-10-27 18:37:04,486 INFO L78 Accepts]: Start accepts. Automaton has 27133 states and 32593 transitions. Word has length 747 [2020-10-27 18:37:04,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:37:04,487 INFO L481 AbstractCegarLoop]: Abstraction has 27133 states and 32593 transitions. [2020-10-27 18:37:04,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:37:04,487 INFO L276 IsEmpty]: Start isEmpty. Operand 27133 states and 32593 transitions. [2020-10-27 18:37:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2020-10-27 18:37:04,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:37:04,515 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:37:04,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 18:37:04,516 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:37:04,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:37:04,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1888394146, now seen corresponding path program 1 times [2020-10-27 18:37:04,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:37:04,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261395571] [2020-10-27 18:37:04,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:37:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:04,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:05,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:07,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:07,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 765 [2020-10-27 18:37:07,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:37:07,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3110 [2020-10-27 18:37:07,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:07,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 18:37:07,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 416 [2020-10-27 18:37:07,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 343 [2020-10-27 18:37:07,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:07,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:37:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:07,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:07,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:07,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:37:07,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:07,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 18:37:07,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:07,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:37:07,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:07,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:37:07,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:08,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:37:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:08,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:08,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:08,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-27 18:37:08,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:08,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 18:37:08,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:08,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:37:08,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:08,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:37:08,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:08,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-27 18:37:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:08,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:08,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:08,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-27 18:37:08,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:08,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-27 18:37:08,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:08,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:37:08,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:08,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-10-27 18:37:08,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:08,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-10-27 18:37:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:08,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:08,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:08,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-27 18:37:08,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:08,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-27 18:37:08,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:08,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 18:37:08,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:37:08,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 278 [2020-10-27 18:37:08,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:37:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 526 proven. 59 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-27 18:37:09,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261395571] [2020-10-27 18:37:09,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:37:09,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 18:37:09,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119832802] [2020-10-27 18:37:09,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:37:09,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:37:09,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:37:09,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:37:09,536 INFO L87 Difference]: Start difference. First operand 27133 states and 32593 transitions. Second operand 8 states. [2020-10-27 18:37:17,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:37:17,050 INFO L93 Difference]: Finished difference Result 55538 states and 67105 transitions. [2020-10-27 18:37:17,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:37:17,051 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 749 [2020-10-27 18:37:17,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:37:17,127 INFO L225 Difference]: With dead ends: 55538 [2020-10-27 18:37:17,127 INFO L226 Difference]: Without dead ends: 28521 [2020-10-27 18:37:17,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:37:17,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28521 states. [2020-10-27 18:37:17,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28521 to 24789. [2020-10-27 18:37:17,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24789 states. [2020-10-27 18:37:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24789 states to 24789 states and 29242 transitions. [2020-10-27 18:37:17,658 INFO L78 Accepts]: Start accepts. Automaton has 24789 states and 29242 transitions. Word has length 749 [2020-10-27 18:37:17,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:37:17,659 INFO L481 AbstractCegarLoop]: Abstraction has 24789 states and 29242 transitions. [2020-10-27 18:37:17,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:37:17,660 INFO L276 IsEmpty]: Start isEmpty. Operand 24789 states and 29242 transitions. [2020-10-27 18:37:17,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2020-10-27 18:37:17,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:37:17,674 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:37:17,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 18:37:17,675 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:37:17,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:37:17,675 INFO L82 PathProgramCache]: Analyzing trace with hash -2135919406, now seen corresponding path program 1 times [2020-10-27 18:37:17,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:37:17,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092364089] [2020-10-27 18:37:17,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:37:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:17,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:17,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:18,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:22,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:22,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 793 [2020-10-27 18:37:22,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:37:22,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-27 18:37:22,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:22,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 18:37:22,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 434 [2020-10-27 18:37:22,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 18:37:22,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:23,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:37:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:23,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:23,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:23,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:37:23,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:23,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 18:37:23,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:23,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:37:23,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:23,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:37:23,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:23,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:37:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:23,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:23,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:23,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-27 18:37:23,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:23,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-27 18:37:23,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:23,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:37:23,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:23,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:37:23,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:23,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-10-27 18:37:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:23,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:23,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:23,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-27 18:37:23,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:23,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-27 18:37:23,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:23,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:37:23,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:23,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 178 [2020-10-27 18:37:23,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:23,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 430 [2020-10-27 18:37:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:23,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:23,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:24,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:24,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-27 18:37:24,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:37:24,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 841 [2020-10-27 18:37:24,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:24,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:37:24,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:37:24,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 288 [2020-10-27 18:37:24,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 601 proven. 2 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-27 18:37:24,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092364089] [2020-10-27 18:37:24,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:37:24,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:37:24,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286029532] [2020-10-27 18:37:24,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:37:24,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:37:24,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:37:24,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:37:24,873 INFO L87 Difference]: Start difference. First operand 24789 states and 29242 transitions. Second operand 7 states. [2020-10-27 18:37:31,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:37:31,012 INFO L93 Difference]: Finished difference Result 48979 states and 58060 transitions. [2020-10-27 18:37:31,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:37:31,013 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 777 [2020-10-27 18:37:31,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:37:31,053 INFO L225 Difference]: With dead ends: 48979 [2020-10-27 18:37:31,054 INFO L226 Difference]: Without dead ends: 22007 [2020-10-27 18:37:31,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:37:31,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22007 states. [2020-10-27 18:37:31,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22007 to 21257. [2020-10-27 18:37:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21257 states. [2020-10-27 18:37:31,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21257 states to 21257 states and 23814 transitions. [2020-10-27 18:37:31,454 INFO L78 Accepts]: Start accepts. Automaton has 21257 states and 23814 transitions. Word has length 777 [2020-10-27 18:37:31,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:37:31,455 INFO L481 AbstractCegarLoop]: Abstraction has 21257 states and 23814 transitions. [2020-10-27 18:37:31,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:37:31,455 INFO L276 IsEmpty]: Start isEmpty. Operand 21257 states and 23814 transitions. [2020-10-27 18:37:31,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2020-10-27 18:37:31,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:37:31,465 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:37:31,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 18:37:31,466 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:37:31,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:37:31,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1142167152, now seen corresponding path program 1 times [2020-10-27 18:37:31,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:37:31,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036788978] [2020-10-27 18:37:31,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:37:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:31,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:32,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:33,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:33,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 820 [2020-10-27 18:37:33,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:37:33,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1658 [2020-10-27 18:37:33,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:33,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 18:37:33,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 637 [2020-10-27 18:37:33,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-27 18:37:33,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:33,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:37:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:33,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:33,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:33,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:37:33,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:33,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 18:37:33,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:33,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:37:33,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:33,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:37:33,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:33,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:37:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:33,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:33,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:33,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-27 18:37:33,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:33,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 18:37:33,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:33,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:37:33,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:33,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:37:33,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:33,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-27 18:37:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:33,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:33,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:33,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-27 18:37:33,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:33,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 18:37:33,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:33,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:37:33,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:33,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:37:33,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:33,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-10-27 18:37:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:33,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:33,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:33,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-27 18:37:33,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:33,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-27 18:37:33,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:33,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:37:33,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:33,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-27 18:37:33,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:33,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 631 [2020-10-27 18:37:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:34,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:34,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:34,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 18:37:34,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:34,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-27 18:37:34,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:34,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 18:37:34,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:37:34,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 18:37:34,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 516 proven. 60 refuted. 0 times theorem prover too weak. 530 trivial. 0 not checked. [2020-10-27 18:37:34,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036788978] [2020-10-27 18:37:34,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:37:34,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 18:37:34,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479473747] [2020-10-27 18:37:34,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:37:34,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:37:34,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:37:34,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:37:34,712 INFO L87 Difference]: Start difference. First operand 21257 states and 23814 transitions. Second operand 8 states. [2020-10-27 18:37:40,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:37:40,295 INFO L93 Difference]: Finished difference Result 24751 states and 27888 transitions. [2020-10-27 18:37:40,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:37:40,296 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 802 [2020-10-27 18:37:40,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:37:40,336 INFO L225 Difference]: With dead ends: 24751 [2020-10-27 18:37:40,336 INFO L226 Difference]: Without dead ends: 24348 [2020-10-27 18:37:40,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:37:40,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24348 states. [2020-10-27 18:37:40,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24348 to 24002. [2020-10-27 18:37:40,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24002 states. [2020-10-27 18:37:40,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24002 states to 24002 states and 27131 transitions. [2020-10-27 18:37:40,757 INFO L78 Accepts]: Start accepts. Automaton has 24002 states and 27131 transitions. Word has length 802 [2020-10-27 18:37:40,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:37:40,758 INFO L481 AbstractCegarLoop]: Abstraction has 24002 states and 27131 transitions. [2020-10-27 18:37:40,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:37:40,758 INFO L276 IsEmpty]: Start isEmpty. Operand 24002 states and 27131 transitions. [2020-10-27 18:37:40,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2020-10-27 18:37:40,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:37:40,777 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:37:40,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 18:37:40,778 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:37:40,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:37:40,778 INFO L82 PathProgramCache]: Analyzing trace with hash 3039342, now seen corresponding path program 1 times [2020-10-27 18:37:40,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:37:40,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221079893] [2020-10-27 18:37:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:37:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:40,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:41,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:41,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:43,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:45,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:45,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 911 [2020-10-27 18:37:45,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:37:45,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 18:37:45,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:45,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:37:45,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 562 [2020-10-27 18:37:45,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 280 [2020-10-27 18:37:45,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:46,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:37:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:46,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:46,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:46,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:37:46,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:46,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 18:37:46,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:46,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:37:46,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:46,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:37:46,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:46,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:37:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:46,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:46,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:46,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-27 18:37:46,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:46,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 18:37:46,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:46,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:37:46,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:46,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:37:46,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:46,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-27 18:37:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:46,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:46,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:46,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 18:37:46,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:46,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 18:37:46,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:46,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:37:46,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:46,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:37:46,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:46,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 355 [2020-10-27 18:37:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:46,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:46,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:46,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 18:37:46,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:46,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 18:37:46,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:46,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:37:46,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:46,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:37:46,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:46,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 484 [2020-10-27 18:37:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:46,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:46,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:46,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 18:37:46,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:46,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 18:37:46,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:46,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:37:46,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:46,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 18:37:46,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:46,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 554 [2020-10-27 18:37:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:46,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:46,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:46,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-27 18:37:46,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:46,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-27 18:37:46,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:46,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:37:46,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:37:46,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 278 [2020-10-27 18:37:46,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1385 backedges. 849 proven. 2 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2020-10-27 18:37:47,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221079893] [2020-10-27 18:37:47,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:37:47,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:37:47,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962769253] [2020-10-27 18:37:47,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:37:47,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:37:47,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:37:47,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:37:47,511 INFO L87 Difference]: Start difference. First operand 24002 states and 27131 transitions. Second operand 7 states. [2020-10-27 18:37:54,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:37:54,022 INFO L93 Difference]: Finished difference Result 50028 states and 56459 transitions. [2020-10-27 18:37:54,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:37:54,024 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 891 [2020-10-27 18:37:54,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:37:54,071 INFO L225 Difference]: With dead ends: 50028 [2020-10-27 18:37:54,071 INFO L226 Difference]: Without dead ends: 26369 [2020-10-27 18:37:54,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:37:54,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26369 states. [2020-10-27 18:37:54,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26369 to 26363. [2020-10-27 18:37:54,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26363 states. [2020-10-27 18:37:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26363 states to 26363 states and 29521 transitions. [2020-10-27 18:37:54,457 INFO L78 Accepts]: Start accepts. Automaton has 26363 states and 29521 transitions. Word has length 891 [2020-10-27 18:37:54,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:37:54,458 INFO L481 AbstractCegarLoop]: Abstraction has 26363 states and 29521 transitions. [2020-10-27 18:37:54,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:37:54,458 INFO L276 IsEmpty]: Start isEmpty. Operand 26363 states and 29521 transitions. [2020-10-27 18:37:54,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2020-10-27 18:37:54,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:37:54,480 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:37:54,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 18:37:54,480 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:37:54,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:37:54,481 INFO L82 PathProgramCache]: Analyzing trace with hash -2102341666, now seen corresponding path program 1 times [2020-10-27 18:37:54,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:37:54,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519633234] [2020-10-27 18:37:54,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:37:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:54,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking...