/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/Problem13_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:03:05,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:03:05,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:03:05,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:03:05,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:03:05,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:03:05,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:03:05,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:03:05,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:03:05,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:03:05,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:03:05,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:03:05,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:03:05,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:03:05,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:03:05,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:03:05,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:03:05,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:03:05,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:03:05,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:03:05,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:03:05,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:03:05,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:03:05,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:03:05,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:03:05,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:03:05,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:03:05,427 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:03:05,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:03:05,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:03:05,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:03:05,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:03:05,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:03:05,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:03:05,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:03:05,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:03:05,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:03:05,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:03:05,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:03:05,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:03:05,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:03:05,442 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 18:03:05,499 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:03:05,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:03:05,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:03:05,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:03:05,504 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:03:05,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:03:05,505 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:03:05,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:03:05,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:03:05,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:03:05,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:03:05,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:03:05,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:03:05,507 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:03:05,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:03:05,508 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:03:05,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:03:05,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:03:05,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:03:05,509 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:03:05,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:03:05,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:03:05,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:03:05,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:03:05,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:03:05,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:03:05,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:03:05,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:03:05,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:03:05,511 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:03:05,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:03:05,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:03:05,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:03:05,945 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:03:05,946 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:03:05,947 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label40.c [2020-10-27 18:03:06,039 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/39a5d231f/5a521a1dd8214e76b5f9114de8b35b42/FLAGa612b1b02 [2020-10-27 18:03:07,233 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:03:07,233 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label40.c [2020-10-27 18:03:07,285 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/39a5d231f/5a521a1dd8214e76b5f9114de8b35b42/FLAGa612b1b02 [2020-10-27 18:03:07,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/39a5d231f/5a521a1dd8214e76b5f9114de8b35b42 [2020-10-27 18:03:07,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:03:07,551 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:03:07,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:03:07,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:03:07,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:03:07,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:03:07" (1/1) ... [2020-10-27 18:03:07,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@608a81e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:07, skipping insertion in model container [2020-10-27 18:03:07,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:03:07" (1/1) ... [2020-10-27 18:03:07,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:03:07,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:03:09,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:03:09,498 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:03:10,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:03:10,480 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:03:10,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:10 WrapperNode [2020-10-27 18:03:10,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:03:10,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:03:10,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:03:10,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:03:10,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:10" (1/1) ... [2020-10-27 18:03:10,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:10" (1/1) ... [2020-10-27 18:03:10,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:10" (1/1) ... [2020-10-27 18:03:10,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:10" (1/1) ... [2020-10-27 18:03:10,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:10" (1/1) ... [2020-10-27 18:03:10,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:10" (1/1) ... [2020-10-27 18:03:10,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:10" (1/1) ... [2020-10-27 18:03:10,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:03:10,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:03:10,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:03:10,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:03:10,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:10" (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 18:03:11,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:03:11,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:03:11,080 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:03:11,080 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:03:11,081 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:03:11,081 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 18:03:11,081 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 18:03:11,081 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:03:11,081 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:03:11,081 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:03:11,083 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 18:03:11,083 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 18:03:11,083 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:03:11,083 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:03:11,083 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:03:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:03:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:03:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:03:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:03:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:03:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:03:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:03:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:03:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:03:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:03:21,251 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:03:21,251 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:03:21,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:03:21 BoogieIcfgContainer [2020-10-27 18:03:21,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:03:21,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:03:21,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:03:21,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:03:21,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:03:07" (1/3) ... [2020-10-27 18:03:21,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e49f0a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:03:21, skipping insertion in model container [2020-10-27 18:03:21,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:10" (2/3) ... [2020-10-27 18:03:21,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e49f0a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:03:21, skipping insertion in model container [2020-10-27 18:03:21,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:03:21" (3/3) ... [2020-10-27 18:03:21,342 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label40.c [2020-10-27 18:03:21,355 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:03:21,362 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:03:21,377 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:03:21,433 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:03:21,433 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:03:21,433 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:03:21,433 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:03:21,433 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:03:21,434 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:03:21,434 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:03:21,434 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:03:21,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-27 18:03:21,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 18:03:21,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:03:21,497 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] [2020-10-27 18:03:21,498 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:03:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:03:21,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2065792798, now seen corresponding path program 1 times [2020-10-27 18:03:21,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:03:21,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449073173] [2020-10-27 18:03:21,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:03:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:21,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:22,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:22,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 18:03:22,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:22,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 546 [2020-10-27 18:03:22,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:22,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:03:22,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:03:22,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 18:03:22,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 18:03:22,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:03:22,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:22,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:22,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:22,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:03:22,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:22,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 18:03:22,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:22,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:03:22,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:03:22,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:03:22,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:03:22,536 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 18:03:22,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449073173] [2020-10-27 18:03:22,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:03:22,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:03:22,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323721253] [2020-10-27 18:03:22,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:03:22,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:03:22,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:03:22,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:03:22,572 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-27 18:03:40,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:03:40,008 INFO L93 Difference]: Finished difference Result 3235 states and 5915 transitions. [2020-10-27 18:03:40,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:03:40,010 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-27 18:03:40,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:03:40,051 INFO L225 Difference]: With dead ends: 3235 [2020-10-27 18:03:40,051 INFO L226 Difference]: Without dead ends: 2027 [2020-10-27 18:03:40,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:03:40,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2020-10-27 18:03:40,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 2010. [2020-10-27 18:03:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2010 states. [2020-10-27 18:03:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3292 transitions. [2020-10-27 18:03:40,276 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3292 transitions. Word has length 35 [2020-10-27 18:03:40,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:03:40,277 INFO L481 AbstractCegarLoop]: Abstraction has 2010 states and 3292 transitions. [2020-10-27 18:03:40,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:03:40,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3292 transitions. [2020-10-27 18:03:40,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 18:03:40,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:03:40,284 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:03:40,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:03:40,285 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:03:40,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:03:40,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1299958039, now seen corresponding path program 1 times [2020-10-27 18:03:40,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:03:40,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562825662] [2020-10-27 18:03:40,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:03:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:40,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:41,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:42,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:42,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 18:03:42,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:03:42,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1685 [2020-10-27 18:03:42,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:42,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:03:42,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 18:03:42,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 18:03:42,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 18:03:42,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:03:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:42,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:42,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:42,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:03:42,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:42,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 18:03:42,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:42,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:03:42,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:03:42,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:03:42,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:03:42,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:03:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:42,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:42,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:42,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 18:03:42,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:42,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-27 18:03:42,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:42,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:03:42,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:03:42,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 18:03:42,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:03:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:03:42,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562825662] [2020-10-27 18:03:42,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:03:42,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:03:42,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372653040] [2020-10-27 18:03:42,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:03:42,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:03:42,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:03:42,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:03:42,524 INFO L87 Difference]: Start difference. First operand 2010 states and 3292 transitions. Second operand 5 states. [2020-10-27 18:04:01,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:04:01,717 INFO L93 Difference]: Finished difference Result 5699 states and 9467 transitions. [2020-10-27 18:04:01,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:04:01,718 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2020-10-27 18:04:01,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:04:01,744 INFO L225 Difference]: With dead ends: 5699 [2020-10-27 18:04:01,744 INFO L226 Difference]: Without dead ends: 3695 [2020-10-27 18:04:01,752 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 18:04:01,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2020-10-27 18:04:01,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 3668. [2020-10-27 18:04:01,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3668 states. [2020-10-27 18:04:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3668 states to 3668 states and 5963 transitions. [2020-10-27 18:04:01,893 INFO L78 Accepts]: Start accepts. Automaton has 3668 states and 5963 transitions. Word has length 110 [2020-10-27 18:04:01,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:04:01,894 INFO L481 AbstractCegarLoop]: Abstraction has 3668 states and 5963 transitions. [2020-10-27 18:04:01,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:04:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 3668 states and 5963 transitions. [2020-10-27 18:04:01,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-27 18:04:01,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:04:01,899 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:01,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:04:01,899 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:04:01,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:04:01,900 INFO L82 PathProgramCache]: Analyzing trace with hash 302172477, now seen corresponding path program 1 times [2020-10-27 18:04:01,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:04:01,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077394226] [2020-10-27 18:04:01,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:04:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:01,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:02,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:03,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:03,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-27 18:04:03,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:04:03,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1366 [2020-10-27 18:04:03,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:03,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:04:03,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 18:04:03,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 18:04:03,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:03,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:04:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:03,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:03,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:03,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:04:03,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:04:03,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 18:04:03,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:03,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:04:03,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:04:03,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:04:03,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:03,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:04:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:03,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:03,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:03,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 18:04:03,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:04:03,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-27 18:04:03,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:03,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:04:03,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:04:03,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 18:04:03,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:04:03,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077394226] [2020-10-27 18:04:03,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:04:03,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:04:03,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014309717] [2020-10-27 18:04:03,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:04:03,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:04:03,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:04:03,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:04:03,826 INFO L87 Difference]: Start difference. First operand 3668 states and 5963 transitions. Second operand 5 states. [2020-10-27 18:04:26,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:04:26,837 INFO L93 Difference]: Finished difference Result 10702 states and 17725 transitions. [2020-10-27 18:04:26,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:04:26,838 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 136 [2020-10-27 18:04:26,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:04:26,881 INFO L225 Difference]: With dead ends: 10702 [2020-10-27 18:04:26,882 INFO L226 Difference]: Without dead ends: 7040 [2020-10-27 18:04:26,894 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 18:04:26,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7040 states. [2020-10-27 18:04:27,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7040 to 6967. [2020-10-27 18:04:27,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6967 states. [2020-10-27 18:04:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6967 states to 6967 states and 10522 transitions. [2020-10-27 18:04:27,128 INFO L78 Accepts]: Start accepts. Automaton has 6967 states and 10522 transitions. Word has length 136 [2020-10-27 18:04:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:04:27,129 INFO L481 AbstractCegarLoop]: Abstraction has 6967 states and 10522 transitions. [2020-10-27 18:04:27,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:04:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 6967 states and 10522 transitions. [2020-10-27 18:04:27,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-27 18:04:27,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:04:27,135 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:27,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:04:27,135 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:04:27,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:04:27,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1901556984, now seen corresponding path program 1 times [2020-10-27 18:04:27,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:04:27,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310102712] [2020-10-27 18:04:27,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:04:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:27,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:27,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:28,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:28,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-27 18:04:28,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:04:28,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1028 [2020-10-27 18:04:28,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:28,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:04:28,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 129 [2020-10-27 18:04:28,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 18:04:28,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:28,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:04:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:28,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:28,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:28,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:04:28,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:04:28,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:04:28,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:28,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:04:28,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:04:28,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:04:28,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:28,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:04:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:28,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:28,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:28,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 18:04:28,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:04:28,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-27 18:04:28,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:28,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:04:28,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:04:28,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 18:04:28,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:04:28,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310102712] [2020-10-27 18:04:28,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:04:28,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:04:28,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464063135] [2020-10-27 18:04:28,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:04:28,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:04:28,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:04:28,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:04:28,709 INFO L87 Difference]: Start difference. First operand 6967 states and 10522 transitions. Second operand 5 states. [2020-10-27 18:04:54,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:04:54,984 INFO L93 Difference]: Finished difference Result 20560 states and 31581 transitions. [2020-10-27 18:04:54,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:04:54,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2020-10-27 18:04:54,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:04:55,087 INFO L225 Difference]: With dead ends: 20560 [2020-10-27 18:04:55,087 INFO L226 Difference]: Without dead ends: 13599 [2020-10-27 18:04:55,113 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 18:04:55,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13599 states. [2020-10-27 18:04:55,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13599 to 13580. [2020-10-27 18:04:55,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13580 states. [2020-10-27 18:04:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13580 states to 13580 states and 18334 transitions. [2020-10-27 18:04:55,607 INFO L78 Accepts]: Start accepts. Automaton has 13580 states and 18334 transitions. Word has length 154 [2020-10-27 18:04:55,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:04:55,608 INFO L481 AbstractCegarLoop]: Abstraction has 13580 states and 18334 transitions. [2020-10-27 18:04:55,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:04:55,608 INFO L276 IsEmpty]: Start isEmpty. Operand 13580 states and 18334 transitions. [2020-10-27 18:04:55,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-27 18:04:55,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:04:55,612 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:55,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:04:55,613 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:04:55,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:04:55,613 INFO L82 PathProgramCache]: Analyzing trace with hash -2009421360, now seen corresponding path program 1 times [2020-10-27 18:04:55,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:04:55,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735916698] [2020-10-27 18:04:55,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:04:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:55,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:56,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:57,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:57,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-27 18:04:57,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:04:57,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1359 [2020-10-27 18:04:57,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:57,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:04:57,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-27 18:04:57,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 18:04:57,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:57,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:04:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:57,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:57,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:57,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:04:57,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:04:57,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:04:57,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:57,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:04:57,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:04:57,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:04:57,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:57,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:04:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:57,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:57,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:57,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 18:04:57,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:04:57,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-27 18:04:57,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:57,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:04:57,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:04:57,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-27 18:04:57,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:04:57,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735916698] [2020-10-27 18:04:57,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:04:57,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:04:57,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181732148] [2020-10-27 18:04:57,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:04:57,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:04:57,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:04:57,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:04:57,495 INFO L87 Difference]: Start difference. First operand 13580 states and 18334 transitions. Second operand 5 states. [2020-10-27 18:05:28,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:05:28,426 INFO L93 Difference]: Finished difference Result 33787 states and 46834 transitions. [2020-10-27 18:05:28,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:05:28,429 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2020-10-27 18:05:28,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:05:28,526 INFO L225 Difference]: With dead ends: 33787 [2020-10-27 18:05:28,527 INFO L226 Difference]: Without dead ends: 20213 [2020-10-27 18:05:28,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:05:28,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20213 states. [2020-10-27 18:05:29,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20213 to 19301. [2020-10-27 18:05:29,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19301 states. [2020-10-27 18:05:29,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19301 states to 19301 states and 25843 transitions. [2020-10-27 18:05:29,161 INFO L78 Accepts]: Start accepts. Automaton has 19301 states and 25843 transitions. Word has length 158 [2020-10-27 18:05:29,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:05:29,162 INFO L481 AbstractCegarLoop]: Abstraction has 19301 states and 25843 transitions. [2020-10-27 18:05:29,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:05:29,166 INFO L276 IsEmpty]: Start isEmpty. Operand 19301 states and 25843 transitions. [2020-10-27 18:05:29,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-27 18:05:29,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:05:29,172 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:29,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:05:29,174 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:05:29,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:05:29,175 INFO L82 PathProgramCache]: Analyzing trace with hash -209699458, now seen corresponding path program 1 times [2020-10-27 18:05:29,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:05:29,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261238034] [2020-10-27 18:05:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:05:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:29,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:29,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:31,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:31,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-27 18:05:31,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:05:31,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1866 [2020-10-27 18:05:31,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:31,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:05:31,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 149 [2020-10-27 18:05:31,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 18:05:31,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:05:31,290 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:05:31,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:05:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:31,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:31,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:31,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:05:31,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:05:31,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:05:31,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:31,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:05:31,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:05:31,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:05:31,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:05:31,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:05:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:31,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:31,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:31,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-27 18:05:31,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:05:31,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-27 18:05:31,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:31,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:05:31,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:05:31,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-27 18:05:31,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:05:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:05:31,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261238034] [2020-10-27 18:05:31,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:05:31,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:05:31,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564390953] [2020-10-27 18:05:31,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:05:31,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:05:31,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:05:31,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:05:31,685 INFO L87 Difference]: Start difference. First operand 19301 states and 25843 transitions. Second operand 5 states. [2020-10-27 18:06:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:06:06,934 INFO L93 Difference]: Finished difference Result 55666 states and 76715 transitions. [2020-10-27 18:06:06,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:06:06,940 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 174 [2020-10-27 18:06:06,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:06:07,101 INFO L225 Difference]: With dead ends: 55666 [2020-10-27 18:06:07,102 INFO L226 Difference]: Without dead ends: 36371 [2020-10-27 18:06:07,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 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 18:06:07,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36371 states. [2020-10-27 18:06:08,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36371 to 36362. [2020-10-27 18:06:08,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36362 states. [2020-10-27 18:06:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36362 states to 36362 states and 47513 transitions. [2020-10-27 18:06:08,189 INFO L78 Accepts]: Start accepts. Automaton has 36362 states and 47513 transitions. Word has length 174 [2020-10-27 18:06:08,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:06:08,190 INFO L481 AbstractCegarLoop]: Abstraction has 36362 states and 47513 transitions. [2020-10-27 18:06:08,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:06:08,190 INFO L276 IsEmpty]: Start isEmpty. Operand 36362 states and 47513 transitions. [2020-10-27 18:06:08,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-27 18:06:08,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:06:08,197 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:06:08,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:06:08,198 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:06:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:06:08,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1792650592, now seen corresponding path program 1 times [2020-10-27 18:06:08,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:06:08,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764235298] [2020-10-27 18:06:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:06:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:08,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:08,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:08,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:10,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:11,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:13,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:13,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-27 18:06:13,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:06:13,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 18:06:13,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:13,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:06:13,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-27 18:06:13,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 18:06:13,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:06:13,502 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:06:13,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:06:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:13,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:13,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:13,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:06:13,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:06:13,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:06:13,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:13,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:06:13,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:06:13,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:06:13,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:06:13,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:06:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:13,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:13,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:13,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 18:06:13,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:06:13,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 18:06:13,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:13,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:06:13,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:06:13,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:06:13,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:06:13,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-27 18:06:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:13,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:13,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:13,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 18:06:13,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:06:13,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 18:06:13,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:13,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:06:13,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:06:13,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 18:06:13,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:06:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-27 18:06:13,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764235298] [2020-10-27 18:06:13,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:06:13,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:06:13,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064347994] [2020-10-27 18:06:13,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:06:13,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:06:13,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:06:13,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:06:13,864 INFO L87 Difference]: Start difference. First operand 36362 states and 47513 transitions. Second operand 5 states. [2020-10-27 18:06:14,798 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:06:50,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:06:50,207 INFO L93 Difference]: Finished difference Result 88189 states and 120148 transitions. [2020-10-27 18:06:50,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:06:50,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 182 [2020-10-27 18:06:50,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:06:50,480 INFO L225 Difference]: With dead ends: 88189 [2020-10-27 18:06:50,481 INFO L226 Difference]: Without dead ends: 51833 [2020-10-27 18:06:50,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:06:50,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51833 states. [2020-10-27 18:06:51,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51833 to 51814. [2020-10-27 18:06:51,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51814 states. [2020-10-27 18:06:52,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51814 states to 51814 states and 68786 transitions. [2020-10-27 18:06:52,224 INFO L78 Accepts]: Start accepts. Automaton has 51814 states and 68786 transitions. Word has length 182 [2020-10-27 18:06:52,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:06:52,225 INFO L481 AbstractCegarLoop]: Abstraction has 51814 states and 68786 transitions. [2020-10-27 18:06:52,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:06:52,225 INFO L276 IsEmpty]: Start isEmpty. Operand 51814 states and 68786 transitions. [2020-10-27 18:06:52,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-27 18:06:52,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:06:52,242 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:52,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:06:52,243 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:06:52,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:06:52,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1683030050, now seen corresponding path program 1 times [2020-10-27 18:06:52,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:06:52,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591956536] [2020-10-27 18:06:52,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:06:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:52,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:53,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:54,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:54,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 18:06:54,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:06:54,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2514 [2020-10-27 18:06:54,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:54,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:06:54,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-27 18:06:54,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 18:06:54,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:06:55,064 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:06:55,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:06:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:55,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:55,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:55,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:06:55,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:06:55,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:06:55,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:55,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:06:55,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:06:55,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:06:55,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:06:55,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:06:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:55,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:55,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:55,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 18:06:55,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:06:55,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-27 18:06:55,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:55,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:06:55,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:06:55,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-27 18:06:55,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:06:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:06:55,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591956536] [2020-10-27 18:06:55,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:06:55,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:06:55,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990384281] [2020-10-27 18:06:55,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:06:55,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:06:55,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:06:55,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:06:55,484 INFO L87 Difference]: Start difference. First operand 51814 states and 68786 transitions. Second operand 5 states. [2020-10-27 18:06:56,480 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 66