/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem06_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:35:46,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:35:46,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:35:46,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:35:46,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:35:46,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:35:46,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:35:46,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:35:46,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:35:46,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:35:46,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:35:46,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:35:46,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:35:46,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:35:46,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:35:46,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:35:46,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:35:46,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:35:46,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:35:46,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:35:46,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:35:46,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:35:46,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:35:46,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:35:46,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:35:46,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:35:46,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:35:46,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:35:46,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:35:46,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:35:46,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:35:46,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:35:46,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:35:46,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:35:46,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:35:46,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:35:46,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:35:46,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:35:46,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:35:46,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:35:46,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:35:46,482 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 21:35:46,508 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:35:46,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:35:46,510 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:35:46,510 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:35:46,511 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:35:46,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:35:46,511 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:35:46,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:35:46,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:35:46,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:35:46,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:35:46,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:35:46,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:35:46,512 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:35:46,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:35:46,513 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:35:46,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:35:46,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:35:46,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:35:46,514 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:35:46,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:35:46,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:35:46,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:35:46,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:35:46,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:35:46,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:35:46,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:35:46,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:35:46,515 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:35:46,515 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:35:46,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:35:46,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:35:46,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:35:46,986 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:35:46,987 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:35:46,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label35.c [2020-10-26 21:35:47,080 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0ab3efec/2d876bc1152a4298b349631a57e9f8b5/FLAG49978dbd6 [2020-10-26 21:35:48,415 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:35:48,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label35.c [2020-10-26 21:35:48,494 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0ab3efec/2d876bc1152a4298b349631a57e9f8b5/FLAG49978dbd6 [2020-10-26 21:35:48,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0ab3efec/2d876bc1152a4298b349631a57e9f8b5 [2020-10-26 21:35:48,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:35:48,557 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:35:48,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:35:48,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:35:48,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:35:48,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:35:48" (1/1) ... [2020-10-26 21:35:48,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ed6162d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:48, skipping insertion in model container [2020-10-26 21:35:48,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:35:48" (1/1) ... [2020-10-26 21:35:48,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:35:48,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:35:51,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:35:51,325 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:35:52,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:35:52,710 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:35:52,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:52 WrapperNode [2020-10-26 21:35:52,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:35:52,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:35:52,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:35:52,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:35:52,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:52" (1/1) ... [2020-10-26 21:35:52,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:52" (1/1) ... [2020-10-26 21:35:52,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:52" (1/1) ... [2020-10-26 21:35:52,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:52" (1/1) ... [2020-10-26 21:35:53,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:52" (1/1) ... [2020-10-26 21:35:53,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:52" (1/1) ... [2020-10-26 21:35:53,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:52" (1/1) ... [2020-10-26 21:35:53,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:35:53,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:35:53,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:35:53,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:35:53,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:35:53,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:35:53,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:35:53,246 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:35:53,246 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:35:53,246 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:35:53,246 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:35:53,247 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:35:53,247 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:35:53,247 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:35:53,247 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:35:53,247 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:35:53,247 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:35:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:35:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:35:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:35:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:35:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:35:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:35:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:35:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:35:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:35:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:35:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:35:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:35:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:35:53,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:35:53,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:36:01,118 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:36:01,118 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:36:01,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:36:01 BoogieIcfgContainer [2020-10-26 21:36:01,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:36:01,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:36:01,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:36:01,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:36:01,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:35:48" (1/3) ... [2020-10-26 21:36:01,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64cdf887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:36:01, skipping insertion in model container [2020-10-26 21:36:01,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:52" (2/3) ... [2020-10-26 21:36:01,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64cdf887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:36:01, skipping insertion in model container [2020-10-26 21:36:01,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:36:01" (3/3) ... [2020-10-26 21:36:01,136 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label35.c [2020-10-26 21:36:01,148 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:36:01,155 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:36:01,168 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:36:01,207 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:36:01,207 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:36:01,207 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:36:01,207 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:36:01,207 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:36:01,207 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:36:01,208 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:36:01,208 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:36:01,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-26 21:36:01,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 980 [2020-10-26 21:36:01,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:36:01,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:36:01,351 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:36:01,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:36:01,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1298693324, now seen corresponding path program 1 times [2020-10-26 21:36:01,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:36:01,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101418642] [2020-10-26 21:36:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:36:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:36:03,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:36:05,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:36:07,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:36:07,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 997 [2020-10-26 21:36:07,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:36:07,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5135 [2020-10-26 21:36:07,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:36:07,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 21:36:07,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:36:07,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 769 [2020-10-26 21:36:07,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 21:36:12,075 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 21:36:12,367 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 21:36:12,580 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 21:36:12,823 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-26 21:36:13,081 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-26 21:36:13,367 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-26 21:36:13,622 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-26 21:36:13,843 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-26 21:36:14,070 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-26 21:36:14,298 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-26 21:36:14,465 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-26 21:36:14,644 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-26 21:36:14,821 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-26 21:36:15,259 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:36:15,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:36:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:36:15,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:36:15,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:36:15,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:36:15,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:36:15,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-26 21:36:15,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:36:15,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:36:15,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:36:15,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:36:15,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:36:27,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:36:27,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101418642] [2020-10-26 21:36:27,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:36:27,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-26 21:36:27,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053224334] [2020-10-26 21:36:28,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:36:28,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:36:28,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:36:28,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:36:28,017 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 18 states. [2020-10-26 21:36:28,599 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-26 21:36:29,682 WARN L193 SmtUtils]: Spent 966.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 197 [2020-10-26 21:36:30,713 WARN L193 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 197 [2020-10-26 21:36:31,814 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 213 DAG size of output: 205 [2020-10-26 21:36:36,532 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 211 DAG size of output: 204 [2020-10-26 21:36:40,828 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 214 DAG size of output: 203 [2020-10-26 21:36:43,939 WARN L193 SmtUtils]: Spent 937.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 194 [2020-10-26 21:36:44,999 WARN L193 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 200 [2020-10-26 21:36:46,398 WARN L193 SmtUtils]: Spent 998.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 199 [2020-10-26 21:36:57,241 WARN L193 SmtUtils]: Spent 944.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 192 [2020-10-26 21:36:58,338 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 213 DAG size of output: 197 [2020-10-26 21:37:01,976 WARN L193 SmtUtils]: Spent 962.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 196 [2020-10-26 21:37:10,264 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 190 [2020-10-26 21:37:11,338 WARN L193 SmtUtils]: Spent 956.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 194 [2020-10-26 21:37:14,238 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 192 [2020-10-26 21:37:27,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:37:27,595 INFO L93 Difference]: Finished difference Result 3401 states and 6365 transitions. [2020-10-26 21:37:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 21:37:27,599 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 979 [2020-10-26 21:37:27,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:37:27,655 INFO L225 Difference]: With dead ends: 3401 [2020-10-26 21:37:27,656 INFO L226 Difference]: Without dead ends: 2020 [2020-10-26 21:37:27,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 21:37:27,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-26 21:37:27,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2020. [2020-10-26 21:37:27,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2020-10-26 21:37:27,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3054 transitions. [2020-10-26 21:37:27,869 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3054 transitions. Word has length 979 [2020-10-26 21:37:27,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:37:27,874 INFO L481 AbstractCegarLoop]: Abstraction has 2020 states and 3054 transitions. [2020-10-26 21:37:27,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 21:37:27,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3054 transitions. [2020-10-26 21:37:27,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1050 [2020-10-26 21:37:27,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:37:28,001 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:37:28,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:37:28,002 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:37:28,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:37:28,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1326784309, now seen corresponding path program 1 times [2020-10-26 21:37:28,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:37:28,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609987932] [2020-10-26 21:37:28,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:37:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:37:28,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:37:30,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:37:33,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:37:33,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1069 [2020-10-26 21:37:33,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:37:33,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5200 [2020-10-26 21:37:33,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:37:33,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:37:33,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:37:33,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 21:37:33,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:37:33,850 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:37:33,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:37:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:37:33,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:37:33,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:37:33,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:37:33,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:37:33,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 21:37:33,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:37:33,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:37:33,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:37:33,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:37:33,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:37:34,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:37:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:37:34,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:37:34,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:37:34,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 21:37:34,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:37:34,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-26 21:37:34,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:37:34,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:37:34,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:37:34,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 21:37:34,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:37:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:37:35,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609987932] [2020-10-26 21:37:35,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:37:35,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:37:35,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185566056] [2020-10-26 21:37:35,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:37:35,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:37:35,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:37:35,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:37:35,844 INFO L87 Difference]: Start difference. First operand 2020 states and 3054 transitions. Second operand 7 states. [2020-10-26 21:37:36,141 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 21:37:37,500 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-26 21:38:01,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:38:01,661 INFO L93 Difference]: Finished difference Result 4497 states and 7531 transitions. [2020-10-26 21:38:01,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 21:38:01,662 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1049 [2020-10-26 21:38:01,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:38:01,681 INFO L225 Difference]: With dead ends: 4497 [2020-10-26 21:38:01,681 INFO L226 Difference]: Without dead ends: 3237 [2020-10-26 21:38:01,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 21:38:01,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3237 states. [2020-10-26 21:38:01,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3237 to 3149. [2020-10-26 21:38:01,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3149 states. [2020-10-26 21:38:01,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 4655 transitions. [2020-10-26 21:38:01,801 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 4655 transitions. Word has length 1049 [2020-10-26 21:38:01,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:38:01,801 INFO L481 AbstractCegarLoop]: Abstraction has 3149 states and 4655 transitions. [2020-10-26 21:38:01,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:38:01,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 4655 transitions. [2020-10-26 21:38:01,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1102 [2020-10-26 21:38:01,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:38:01,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:38:01,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:38:01,822 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:38:01,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:38:01,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1658803176, now seen corresponding path program 1 times [2020-10-26 21:38:01,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:38:01,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728053273] [2020-10-26 21:38:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:38:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:02,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:02,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:06,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:07,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:07,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1121 [2020-10-26 21:38:07,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:38:07,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 21:38:07,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:07,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 21:38:07,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:38:07,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1112 [2020-10-26 21:38:07,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:08,664 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:38:08,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:38:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:08,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:08,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:08,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:38:08,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:38:08,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 21:38:08,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:08,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:38:08,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:38:08,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:38:08,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:08,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:38:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:08,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:08,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:09,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:09,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 21:38:09,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:38:09,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-26 21:38:09,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:09,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:38:09,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:38:09,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 21:38:09,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 21:38:10,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728053273] [2020-10-26 21:38:10,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:38:10,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 21:38:10,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450245307] [2020-10-26 21:38:10,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 21:38:10,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:38:10,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 21:38:10,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 21:38:10,560 INFO L87 Difference]: Start difference. First operand 3149 states and 4655 transitions. Second operand 6 states. [2020-10-26 21:38:10,813 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:38:29,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:38:29,651 INFO L93 Difference]: Finished difference Result 7831 states and 12305 transitions. [2020-10-26 21:38:29,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 21:38:29,651 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1101 [2020-10-26 21:38:29,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:38:29,686 INFO L225 Difference]: With dead ends: 7831 [2020-10-26 21:38:29,687 INFO L226 Difference]: Without dead ends: 5442 [2020-10-26 21:38:29,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:38:29,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5442 states. [2020-10-26 21:38:29,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5442 to 5400. [2020-10-26 21:38:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5400 states. [2020-10-26 21:38:29,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5400 states to 5400 states and 7813 transitions. [2020-10-26 21:38:29,884 INFO L78 Accepts]: Start accepts. Automaton has 5400 states and 7813 transitions. Word has length 1101 [2020-10-26 21:38:29,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:38:29,887 INFO L481 AbstractCegarLoop]: Abstraction has 5400 states and 7813 transitions. [2020-10-26 21:38:29,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 21:38:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 5400 states and 7813 transitions. [2020-10-26 21:38:29,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1114 [2020-10-26 21:38:29,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:38:29,916 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:38:29,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 21:38:29,917 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:38:29,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:38:29,918 INFO L82 PathProgramCache]: Analyzing trace with hash 3769231, now seen corresponding path program 1 times [2020-10-26 21:38:29,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:38:29,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817091181] [2020-10-26 21:38:29,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:38:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:30,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:30,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:34,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:35,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:35,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1135 [2020-10-26 21:38:35,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:38:35,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-26 21:38:35,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:35,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:38:35,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:38:35,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 21:38:35,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:35,680 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:38:35,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:38:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:35,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:35,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:35,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:38:35,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:38:35,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 21:38:35,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:35,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:38:35,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:38:35,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:38:35,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:35,859 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:38:35,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:38:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:35,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:36,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:36,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:36,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 21:38:36,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:38:36,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 599 [2020-10-26 21:38:36,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:36,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:38:36,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:38:36,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 21:38:36,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:36,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-10-26 21:38:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:36,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:36,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:36,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 21:38:36,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:38:36,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 21:38:36,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:36,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:38:36,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:38:36,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 21:38:36,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 21:38:37,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817091181] [2020-10-26 21:38:37,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:38:37,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 21:38:37,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291604578] [2020-10-26 21:38:37,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:38:37,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:38:37,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:38:37,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:38:37,680 INFO L87 Difference]: Start difference. First operand 5400 states and 7813 transitions. Second operand 7 states. [2020-10-26 21:38:37,971 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 21:38:39,856 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 21:39:00,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:39:00,990 INFO L93 Difference]: Finished difference Result 14940 states and 22567 transitions. [2020-10-26 21:39:00,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:39:00,991 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1113 [2020-10-26 21:39:00,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:39:01,049 INFO L225 Difference]: With dead ends: 14940 [2020-10-26 21:39:01,049 INFO L226 Difference]: Without dead ends: 10300 [2020-10-26 21:39:01,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:39:01,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10300 states. [2020-10-26 21:39:01,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10300 to 10001. [2020-10-26 21:39:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10001 states. [2020-10-26 21:39:01,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10001 states to 10001 states and 13926 transitions. [2020-10-26 21:39:01,395 INFO L78 Accepts]: Start accepts. Automaton has 10001 states and 13926 transitions. Word has length 1113 [2020-10-26 21:39:01,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:39:01,396 INFO L481 AbstractCegarLoop]: Abstraction has 10001 states and 13926 transitions. [2020-10-26 21:39:01,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:39:01,396 INFO L276 IsEmpty]: Start isEmpty. Operand 10001 states and 13926 transitions. [2020-10-26 21:39:01,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1118 [2020-10-26 21:39:01,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:39:01,442 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:39:01,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 21:39:01,443 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:39:01,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:39:01,444 INFO L82 PathProgramCache]: Analyzing trace with hash 725073751, now seen corresponding path program 1 times [2020-10-26 21:39:01,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:39:01,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395318979] [2020-10-26 21:39:01,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:39:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:39:01,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:02,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:05,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:06,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:39:06,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1139 [2020-10-26 21:39:06,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:39:06,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5139 [2020-10-26 21:39:06,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:39:06,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:39:06,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:39:06,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 21:39:06,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:39:07,188 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:39:07,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:39:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:39:07,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:07,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:39:07,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:39:07,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:39:07,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 21:39:07,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:39:07,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:39:07,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:39:07,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:39:07,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:39:07,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:39:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:39:07,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:07,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:07,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:39:07,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 21:39:07,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:39:07,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-26 21:39:07,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:39:07,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:39:07,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:39:07,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 21:39:07,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:39:07,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-10-26 21:39:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:39:07,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:07,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:39:07,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 21:39:07,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:39:07,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 21:39:07,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:39:07,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:39:07,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:39:07,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 21:39:07,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:39:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 131 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 21:39:08,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395318979] [2020-10-26 21:39:08,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:39:08,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:39:08,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787290478] [2020-10-26 21:39:08,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:39:08,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:39:08,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:39:08,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:39:08,852 INFO L87 Difference]: Start difference. First operand 10001 states and 13926 transitions. Second operand 8 states. [2020-10-26 21:39:09,128 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:39:10,258 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 159