/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:41:10,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:41:10,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:41:10,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:41:10,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:41:10,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:41:10,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:41:10,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:41:10,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:41:10,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:41:10,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:41:10,510 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:41:10,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:41:10,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:41:10,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:41:10,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:41:10,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:41:10,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:41:10,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:41:10,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:41:10,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:41:10,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:41:10,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:41:10,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:41:10,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:41:10,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:41:10,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:41:10,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:41:10,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:41:10,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:41:10,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:41:10,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:41:10,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:41:10,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:41:10,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:41:10,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:41:10,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:41:10,566 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:41:10,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:41:10,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:41:10,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:41:10,575 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 20:41:10,629 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:41:10,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:41:10,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:41:10,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:41:10,634 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:41:10,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:41:10,634 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:41:10,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:41:10,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:41:10,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:41:10,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:41:10,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:41:10,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:41:10,637 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:41:10,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:41:10,637 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:41:10,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:41:10,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:41:10,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:41:10,638 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:41:10,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:41:10,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:41:10,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:41:10,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:41:10,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:41:10,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:41:10,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:41:10,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:41:10,640 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:41:10,640 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:41:11,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:41:11,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:41:11,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:41:11,119 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:41:11,119 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:41:11,120 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label00.c [2020-10-26 20:41:11,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b3e6dcf6/13569b671bc24c87bd7a68c1f0f5cc4e/FLAG64253514f [2020-10-26 20:41:12,086 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:41:12,087 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label00.c [2020-10-26 20:41:12,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b3e6dcf6/13569b671bc24c87bd7a68c1f0f5cc4e/FLAG64253514f [2020-10-26 20:41:12,275 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b3e6dcf6/13569b671bc24c87bd7a68c1f0f5cc4e [2020-10-26 20:41:12,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:41:12,285 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:41:12,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:41:12,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:41:12,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:41:12,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:41:12" (1/1) ... [2020-10-26 20:41:12,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@efdc3ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:12, skipping insertion in model container [2020-10-26 20:41:12,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:41:12" (1/1) ... [2020-10-26 20:41:12,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:41:12,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:41:13,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:41:13,112 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:41:13,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:41:13,511 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:41:13,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:13 WrapperNode [2020-10-26 20:41:13,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:41:13,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:41:13,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:41:13,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:41:13,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:13" (1/1) ... [2020-10-26 20:41:13,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:13" (1/1) ... [2020-10-26 20:41:13,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:13" (1/1) ... [2020-10-26 20:41:13,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:13" (1/1) ... [2020-10-26 20:41:13,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:13" (1/1) ... [2020-10-26 20:41:13,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:13" (1/1) ... [2020-10-26 20:41:13,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:13" (1/1) ... [2020-10-26 20:41:13,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:41:13,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:41:13,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:41:13,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:41:13,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:41:13,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:41:13,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:41:13,830 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:41:13,831 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:41:13,831 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:41:13,832 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:41:13,832 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:41:13,832 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:41:13,832 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:41:13,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:41:13,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:41:13,834 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:41:13,834 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:41:13,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:41:13,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:41:13,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:41:13,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:41:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:41:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:41:15,994 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:41:15,994 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:41:15,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:41:15 BoogieIcfgContainer [2020-10-26 20:41:15,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:41:15,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:41:15,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:41:16,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:41:16,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:41:12" (1/3) ... [2020-10-26 20:41:16,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f5cda1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:41:16, skipping insertion in model container [2020-10-26 20:41:16,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:13" (2/3) ... [2020-10-26 20:41:16,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f5cda1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:41:16, skipping insertion in model container [2020-10-26 20:41:16,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:41:15" (3/3) ... [2020-10-26 20:41:16,006 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label00.c [2020-10-26 20:41:16,018 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:41:16,024 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:41:16,038 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:41:16,068 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:41:16,068 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:41:16,068 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:41:16,069 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:41:16,069 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:41:16,069 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:41:16,069 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:41:16,069 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:41:16,094 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:41:16,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-26 20:41:16,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:41:16,116 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] [2020-10-26 20:41:16,117 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:41:16,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:41:16,124 INFO L82 PathProgramCache]: Analyzing trace with hash 2037096004, now seen corresponding path program 1 times [2020-10-26 20:41:16,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:41:16,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716211117] [2020-10-26 20:41:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:41:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:41:16,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:17,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:21,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:41:21,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-26 20:41:21,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:41:21,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4530 [2020-10-26 20:41:21,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:41:21,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:41:21,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:41:21,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:41:21,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:41:22,478 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-26 20:41:22,741 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2020-10-26 20:41:23,054 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 83 [2020-10-26 20:41:23,347 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 77 [2020-10-26 20:41:23,662 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 71 [2020-10-26 20:41:23,999 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 65 [2020-10-26 20:41:24,249 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 56 [2020-10-26 20:41:24,423 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-10-26 20:41:24,729 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:41:24,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:41:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:41:24,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:24,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:41:24,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:41:24,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:41:24,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 20:41:24,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:41:24,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:41:24,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:41:24,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:41:24,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:41:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:41:25,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716211117] [2020-10-26 20:41:25,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:41:25,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-26 20:41:25,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525021808] [2020-10-26 20:41:25,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:41:25,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:41:25,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:41:25,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:41:25,713 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 12 states. [2020-10-26 20:41:26,272 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-26 20:41:27,313 WARN L193 SmtUtils]: Spent 951.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 209 [2020-10-26 20:41:28,416 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 220 DAG size of output: 209 [2020-10-26 20:41:29,649 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 240 DAG size of output: 229 [2020-10-26 20:41:31,724 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 245 DAG size of output: 226 [2020-10-26 20:41:33,956 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 245 DAG size of output: 223 [2020-10-26 20:41:36,370 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 248 DAG size of output: 220 [2020-10-26 20:41:40,772 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 250 DAG size of output: 216 [2020-10-26 20:41:42,801 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 252 DAG size of output: 212 [2020-10-26 20:41:46,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:41:46,182 INFO L93 Difference]: Finished difference Result 742 states and 1293 transitions. [2020-10-26 20:41:46,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:41:46,185 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 199 [2020-10-26 20:41:46,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:41:46,215 INFO L225 Difference]: With dead ends: 742 [2020-10-26 20:41:46,215 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 20:41:46,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:41:46,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 20:41:46,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-26 20:41:46,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-26 20:41:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2020-10-26 20:41:46,369 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 199 [2020-10-26 20:41:46,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:41:46,373 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2020-10-26 20:41:46,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:41:46,373 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2020-10-26 20:41:46,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-26 20:41:46,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:41:46,390 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 20:41:46,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:41:46,395 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:41:46,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:41:46,396 INFO L82 PathProgramCache]: Analyzing trace with hash -307842377, now seen corresponding path program 1 times [2020-10-26 20:41:46,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:41:46,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162032986] [2020-10-26 20:41:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:41:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:41:46,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:46,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:49,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:51,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:41:51,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 222 [2020-10-26 20:41:51,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:41:51,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4725 [2020-10-26 20:41:51,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:41:51,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 20:41:51,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:41:51,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-26 20:41:51,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-10-26 20:41:52,325 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-26 20:41:52,497 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-26 20:41:52,752 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 78 [2020-10-26 20:41:52,934 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2020-10-26 20:41:53,106 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-26 20:41:53,255 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-26 20:41:53,400 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-26 20:41:53,676 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:41:53,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:41:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:41:53,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:53,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:41:53,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:41:53,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:41:53,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:41:53,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:41:53,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:41:53,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:41:53,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:41:53,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:41:53,914 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:41:53,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:41:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:41:53,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:54,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:41:54,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:41:54,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:41:54,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-26 20:41:54,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:41:54,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:41:54,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:41:54,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:41:54,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:41:54,324 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-26 20:41:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:41:54,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162032986] [2020-10-26 20:41:54,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:41:54,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 20:41:54,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424363836] [2020-10-26 20:41:54,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 20:41:54,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:41:54,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 20:41:54,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:41:54,935 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 16 states. [2020-10-26 20:41:55,412 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-26 20:41:56,144 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 84 [2020-10-26 20:41:56,552 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-10-26 20:41:56,960 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-26 20:41:57,916 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 197 [2020-10-26 20:41:58,961 WARN L193 SmtUtils]: Spent 977.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 205 [2020-10-26 20:42:00,643 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 230 DAG size of output: 204 [2020-10-26 20:42:01,217 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-26 20:42:03,502 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 235 DAG size of output: 203 [2020-10-26 20:42:06,692 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 236 DAG size of output: 202 [2020-10-26 20:42:10,429 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 237 DAG size of output: 201 [2020-10-26 20:42:11,725 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 237 DAG size of output: 199 [2020-10-26 20:42:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:14,054 INFO L93 Difference]: Finished difference Result 758 states and 1214 transitions. [2020-10-26 20:42:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 20:42:14,058 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 210 [2020-10-26 20:42:14,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:14,064 INFO L225 Difference]: With dead ends: 758 [2020-10-26 20:42:14,064 INFO L226 Difference]: Without dead ends: 514 [2020-10-26 20:42:14,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=200, Invalid=556, Unknown=0, NotChecked=0, Total=756 [2020-10-26 20:42:14,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-10-26 20:42:14,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 510. [2020-10-26 20:42:14,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 510 states. [2020-10-26 20:42:14,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 678 transitions. [2020-10-26 20:42:14,105 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 678 transitions. Word has length 210 [2020-10-26 20:42:14,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:14,105 INFO L481 AbstractCegarLoop]: Abstraction has 510 states and 678 transitions. [2020-10-26 20:42:14,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 20:42:14,106 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 678 transitions. [2020-10-26 20:42:14,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-26 20:42:14,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:14,110 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:14,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:42:14,111 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:14,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:14,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1813571189, now seen corresponding path program 1 times [2020-10-26 20:42:14,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:14,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163076563] [2020-10-26 20:42:14,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:14,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:14,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:15,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:15,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-26 20:42:15,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:15,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1577 [2020-10-26 20:42:15,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:15,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:15,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:42:15,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-26 20:42:15,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:16,187 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:16,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:16,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:16,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:16,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:16,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:16,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:42:16,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:16,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:42:16,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:16,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:42:16,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:16,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:16,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:16,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:16,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:42:16,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:16,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 20:42:16,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:16,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:16,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:16,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:42:16,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:42:16,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163076563] [2020-10-26 20:42:16,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:16,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:42:16,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366499478] [2020-10-26 20:42:16,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:42:16,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:16,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:42:16,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:42:16,522 INFO L87 Difference]: Start difference. First operand 510 states and 678 transitions. Second operand 5 states. [2020-10-26 20:42:16,985 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:42:19,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:19,830 INFO L93 Difference]: Finished difference Result 992 states and 1473 transitions. [2020-10-26 20:42:19,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:42:19,831 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 220 [2020-10-26 20:42:19,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:19,837 INFO L225 Difference]: With dead ends: 992 [2020-10-26 20:42:19,837 INFO L226 Difference]: Without dead ends: 748 [2020-10-26 20:42:19,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:42:19,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2020-10-26 20:42:19,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 732. [2020-10-26 20:42:19,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 732 states. [2020-10-26 20:42:19,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1020 transitions. [2020-10-26 20:42:19,875 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1020 transitions. Word has length 220 [2020-10-26 20:42:19,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:19,875 INFO L481 AbstractCegarLoop]: Abstraction has 732 states and 1020 transitions. [2020-10-26 20:42:19,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:42:19,876 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1020 transitions. [2020-10-26 20:42:19,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-26 20:42:19,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:19,880 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:19,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:42:19,881 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:19,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:19,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1764734152, now seen corresponding path program 1 times [2020-10-26 20:42:19,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:19,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978757694] [2020-10-26 20:42:19,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:19,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:20,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:21,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:21,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 244 [2020-10-26 20:42:21,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:21,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1747 [2020-10-26 20:42:21,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:21,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:21,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:42:21,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 20:42:21,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:21,927 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:21,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:21,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:21,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:21,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:21,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:21,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:42:21,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:21,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:42:21,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:21,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:42:21,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:22,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:22,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:22,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:22,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:42:22,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:22,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 20:42:22,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:22,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:22,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:22,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:42:22,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:22,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:42:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:22,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:22,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:22,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:42:22,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:22,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 20:42:22,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:22,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:22,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:22,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:42:22,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:42:22,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978757694] [2020-10-26 20:42:22,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:22,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:42:22,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875931788] [2020-10-26 20:42:22,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:42:22,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:22,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:42:22,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:42:22,336 INFO L87 Difference]: Start difference. First operand 732 states and 1020 transitions. Second operand 7 states. [2020-10-26 20:42:22,797 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:24,318 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:42:27,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:27,056 INFO L93 Difference]: Finished difference Result 1671 states and 2609 transitions. [2020-10-26 20:42:27,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:42:27,057 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 230 [2020-10-26 20:42:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:27,071 INFO L225 Difference]: With dead ends: 1671 [2020-10-26 20:42:27,071 INFO L226 Difference]: Without dead ends: 1205 [2020-10-26 20:42:27,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:42:27,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2020-10-26 20:42:27,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1168. [2020-10-26 20:42:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1168 states. [2020-10-26 20:42:27,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1628 transitions. [2020-10-26 20:42:27,164 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1628 transitions. Word has length 230 [2020-10-26 20:42:27,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:27,165 INFO L481 AbstractCegarLoop]: Abstraction has 1168 states and 1628 transitions. [2020-10-26 20:42:27,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:42:27,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1628 transitions. [2020-10-26 20:42:27,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-26 20:42:27,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:27,171 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:27,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:42:27,171 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:27,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:27,176 INFO L82 PathProgramCache]: Analyzing trace with hash 15877532, now seen corresponding path program 1 times [2020-10-26 20:42:27,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:27,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407823445] [2020-10-26 20:42:27,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:27,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:27,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:28,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:32,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:32,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-26 20:42:32,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:42:32,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-26 20:42:32,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:32,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:42:32,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:32,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:42:32,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:32,622 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:32,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:32,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:32,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:32,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:32,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:32,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:42:32,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:32,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:32,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:32,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:32,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:32,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:32,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:32,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:32,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:32,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:42:32,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:32,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-26 20:42:32,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:32,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:32,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:32,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:42:32,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:32,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:42:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:32,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:32,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:32,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:42:32,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:32,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-26 20:42:32,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:32,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:32,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:32,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:42:32,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:42:33,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407823445] [2020-10-26 20:42:33,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:33,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:42:33,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113542711] [2020-10-26 20:42:33,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:42:33,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:33,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:42:33,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:42:33,036 INFO L87 Difference]: Start difference. First operand 1168 states and 1628 transitions. Second operand 8 states. [2020-10-26 20:42:33,332 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:35,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:35,643 INFO L93 Difference]: Finished difference Result 2046 states and 2958 transitions. [2020-10-26 20:42:35,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:42:35,644 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 237 [2020-10-26 20:42:35,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:35,650 INFO L225 Difference]: With dead ends: 2046 [2020-10-26 20:42:35,651 INFO L226 Difference]: Without dead ends: 1144 [2020-10-26 20:42:35,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:42:35,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2020-10-26 20:42:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 1142. [2020-10-26 20:42:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1142 states. [2020-10-26 20:42:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1533 transitions. [2020-10-26 20:42:35,693 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1533 transitions. Word has length 237 [2020-10-26 20:42:35,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:35,693 INFO L481 AbstractCegarLoop]: Abstraction has 1142 states and 1533 transitions. [2020-10-26 20:42:35,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:42:35,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1533 transitions. [2020-10-26 20:42:35,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-26 20:42:35,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:35,699 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2020-10-26 20:42:35,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:42:35,700 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:35,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:35,700 INFO L82 PathProgramCache]: Analyzing trace with hash -2035924770, now seen corresponding path program 1 times [2020-10-26 20:42:35,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:35,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610320988] [2020-10-26 20:42:35,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:35,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:35,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:37,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:38,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:38,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:40,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:40,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-26 20:42:40,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:42:40,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4732 [2020-10-26 20:42:40,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:40,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:42:40,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:42:40,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 20:42:40,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:40,761 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:40,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:40,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:40,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:40,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:40,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:40,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 20:42:40,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:40,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:42:40,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:40,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:42:40,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:40,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:40,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:40,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:40,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:42:40,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:40,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 20:42:40,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:40,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:40,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:40,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:42:40,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:40,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:42:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:40,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:40,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:40,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:40,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:42:40,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:40,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 20:42:40,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:40,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:40,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:40,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:42:40,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:40,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 20:42:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:41,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:41,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:41,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:42:41,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:41,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 20:42:41,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:41,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:41,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:41,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:42:41,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 43 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 20:42:41,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610320988] [2020-10-26 20:42:41,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:41,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:42:41,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362944579] [2020-10-26 20:42:41,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:42:41,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:41,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:42:41,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:42:41,115 INFO L87 Difference]: Start difference. First operand 1142 states and 1533 transitions. Second operand 8 states. [2020-10-26 20:42:41,618 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:42,519 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:47,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:47,666 INFO L93 Difference]: Finished difference Result 3872 states and 6163 transitions. [2020-10-26 20:42:47,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:42:47,668 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 240 [2020-10-26 20:42:47,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:47,692 INFO L225 Difference]: With dead ends: 3872 [2020-10-26 20:42:47,692 INFO L226 Difference]: Without dead ends: 2996 [2020-10-26 20:42:47,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-26 20:42:47,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2020-10-26 20:42:47,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2903. [2020-10-26 20:42:47,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2903 states. [2020-10-26 20:42:47,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 3956 transitions. [2020-10-26 20:42:47,826 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 3956 transitions. Word has length 240 [2020-10-26 20:42:47,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:47,826 INFO L481 AbstractCegarLoop]: Abstraction has 2903 states and 3956 transitions. [2020-10-26 20:42:47,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:42:47,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 3956 transitions. [2020-10-26 20:42:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-26 20:42:47,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:47,838 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:47,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:42:47,838 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:47,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:47,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1985414009, now seen corresponding path program 1 times [2020-10-26 20:42:47,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:47,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533486781] [2020-10-26 20:42:47,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:47,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:48,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:49,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:49,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-10-26 20:42:49,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:49,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1448 [2020-10-26 20:42:49,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:49,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:49,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:42:49,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 20:42:49,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:49,634 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:49,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:49,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:49,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:49,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:49,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:49,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:42:49,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:49,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:42:49,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:49,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:42:49,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:49,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:49,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:49,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:49,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:49,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:42:49,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:49,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 20:42:49,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:49,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:49,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:49,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:42:49,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:49,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:42:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:49,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:49,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:49,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:42:49,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:49,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-26 20:42:49,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:49,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:49,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:49,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 20:42:49,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:42:50,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533486781] [2020-10-26 20:42:50,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:50,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:42:50,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138492482] [2020-10-26 20:42:50,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:42:50,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:50,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:42:50,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:42:50,059 INFO L87 Difference]: Start difference. First operand 2903 states and 3956 transitions. Second operand 7 states. [2020-10-26 20:42:50,524 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:51,437 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:42:56,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:56,378 INFO L93 Difference]: Finished difference Result 10667 states and 16029 transitions. [2020-10-26 20:42:56,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:42:56,378 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 258 [2020-10-26 20:42:56,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:56,435 INFO L225 Difference]: With dead ends: 10667 [2020-10-26 20:42:56,435 INFO L226 Difference]: Without dead ends: 8030 [2020-10-26 20:42:56,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:42:56,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8030 states. [2020-10-26 20:42:56,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8030 to 7925. [2020-10-26 20:42:56,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7925 states. [2020-10-26 20:42:56,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7925 states to 7925 states and 10901 transitions. [2020-10-26 20:42:56,747 INFO L78 Accepts]: Start accepts. Automaton has 7925 states and 10901 transitions. Word has length 258 [2020-10-26 20:42:56,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:56,747 INFO L481 AbstractCegarLoop]: Abstraction has 7925 states and 10901 transitions. [2020-10-26 20:42:56,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:42:56,748 INFO L276 IsEmpty]: Start isEmpty. Operand 7925 states and 10901 transitions. [2020-10-26 20:42:56,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-26 20:42:56,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:56,777 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:56,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:42:56,777 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:56,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:56,778 INFO L82 PathProgramCache]: Analyzing trace with hash 476874779, now seen corresponding path program 1 times [2020-10-26 20:42:56,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:56,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418014308] [2020-10-26 20:42:56,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:56,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:57,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:58,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:58,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:01,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:01,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-26 20:43:01,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:43:01,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4502 [2020-10-26 20:43:01,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:01,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:43:01,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:01,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 20:43:01,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:01,609 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:01,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:01,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:01,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:01,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:01,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:01,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:43:01,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:01,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:01,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:01,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:01,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:01,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:01,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:01,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:01,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:01,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:43:01,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:43:01,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 20:43:01,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:01,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:01,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:01,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:43:01,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:01,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:43:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:01,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:02,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:02,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:43:02,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:02,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-26 20:43:02,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:02,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:02,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:02,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:43:02,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 20:43:02,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418014308] [2020-10-26 20:43:02,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:02,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:43:02,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196577512] [2020-10-26 20:43:02,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:43:02,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:02,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:43:02,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:43:02,147 INFO L87 Difference]: Start difference. First operand 7925 states and 10901 transitions. Second operand 7 states. [2020-10-26 20:43:02,428 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:43:04,044 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:43:06,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:06,737 INFO L93 Difference]: Finished difference Result 22177 states and 31306 transitions. [2020-10-26 20:43:06,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:43:06,738 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 265 [2020-10-26 20:43:06,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:06,834 INFO L225 Difference]: With dead ends: 22177 [2020-10-26 20:43:06,834 INFO L226 Difference]: Without dead ends: 15368 [2020-10-26 20:43:06,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:43:06,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15368 states. [2020-10-26 20:43:07,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15368 to 15271. [2020-10-26 20:43:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15271 states. [2020-10-26 20:43:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15271 states to 15271 states and 20576 transitions. [2020-10-26 20:43:07,382 INFO L78 Accepts]: Start accepts. Automaton has 15271 states and 20576 transitions. Word has length 265 [2020-10-26 20:43:07,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:07,382 INFO L481 AbstractCegarLoop]: Abstraction has 15271 states and 20576 transitions. [2020-10-26 20:43:07,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:43:07,382 INFO L276 IsEmpty]: Start isEmpty. Operand 15271 states and 20576 transitions. [2020-10-26 20:43:07,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-10-26 20:43:07,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:07,429 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:07,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:43:07,429 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:07,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:07,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1677301110, now seen corresponding path program 1 times [2020-10-26 20:43:07,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:07,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916899310] [2020-10-26 20:43:07,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:07,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:07,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:09,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:11,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:11,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 292 [2020-10-26 20:43:11,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:43:11,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3742 [2020-10-26 20:43:11,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:11,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:43:11,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:11,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 243 [2020-10-26 20:43:11,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:11,759 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:11,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:11,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:11,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:11,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:11,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:11,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:43:11,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:11,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:11,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:11,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:11,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:11,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:11,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:11,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:11,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:43:11,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:11,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 20:43:11,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:11,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:11,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:11,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:43:11,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:11,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:43:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:12,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:12,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:12,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 20:43:12,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:12,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-26 20:43:12,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:12,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:43:12,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:12,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-26 20:43:12,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:43:12,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916899310] [2020-10-26 20:43:12,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:12,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 20:43:12,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379607418] [2020-10-26 20:43:12,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:43:12,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:12,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:43:12,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:43:12,634 INFO L87 Difference]: Start difference. First operand 15271 states and 20576 transitions. Second operand 10 states. [2020-10-26 20:43:12,933 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:43:14,502 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 170 [2020-10-26 20:43:19,816 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 171 [2020-10-26 20:43:22,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:22,498 INFO L93 Difference]: Finished difference Result 49890 states and 71181 transitions. [2020-10-26 20:43:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 20:43:22,499 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 278 [2020-10-26 20:43:22,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:22,692 INFO L225 Difference]: With dead ends: 49890 [2020-10-26 20:43:22,692 INFO L226 Difference]: Without dead ends: 34849 [2020-10-26 20:43:22,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-10-26 20:43:22,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34849 states. [2020-10-26 20:43:23,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34849 to 34584. [2020-10-26 20:43:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34584 states. [2020-10-26 20:43:23,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34584 states to 34584 states and 48293 transitions. [2020-10-26 20:43:23,913 INFO L78 Accepts]: Start accepts. Automaton has 34584 states and 48293 transitions. Word has length 278 [2020-10-26 20:43:23,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:23,914 INFO L481 AbstractCegarLoop]: Abstraction has 34584 states and 48293 transitions. [2020-10-26 20:43:23,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:43:23,914 INFO L276 IsEmpty]: Start isEmpty. Operand 34584 states and 48293 transitions. [2020-10-26 20:43:24,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-10-26 20:43:24,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:24,015 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:43:24,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:43:24,016 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:24,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:24,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1032535073, now seen corresponding path program 1 times [2020-10-26 20:43:24,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:24,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098400732] [2020-10-26 20:43:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:24,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:24,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:28,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:28,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:29,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:29,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 303 [2020-10-26 20:43:29,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:43:29,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-26 20:43:29,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:29,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:43:29,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:29,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:43:29,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:29,410 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:29,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:29,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:29,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:29,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:29,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:29,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:43:29,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:29,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:29,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:29,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:29,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:29,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:29,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:29,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:29,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:43:29,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:29,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:43:29,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:29,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:29,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:29,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:43:29,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:29,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:43:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:29,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:29,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:29,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:43:29,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:29,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 20:43:29,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:29,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:29,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:29,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:43:29,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:29,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 20:43:29,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:29,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:29,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:29,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:43:29,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:29,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 20:43:29,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:29,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:29,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:43:29,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:29,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 84 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:43:30,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098400732] [2020-10-26 20:43:30,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:30,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:43:30,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921701261] [2020-10-26 20:43:30,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:43:30,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:30,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:43:30,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:43:30,109 INFO L87 Difference]: Start difference. First operand 34584 states and 48293 transitions. Second operand 8 states. [2020-10-26 20:43:30,351 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:43:32,510 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-26 20:43:34,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:34,964 INFO L93 Difference]: Finished difference Result 81976 states and 123279 transitions. [2020-10-26 20:43:34,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 20:43:34,965 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 287 [2020-10-26 20:43:34,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:35,255 INFO L225 Difference]: With dead ends: 81976 [2020-10-26 20:43:35,255 INFO L226 Difference]: Without dead ends: 47658 [2020-10-26 20:43:35,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-26 20:43:35,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47658 states. [2020-10-26 20:43:37,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47658 to 46809. [2020-10-26 20:43:37,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46809 states. [2020-10-26 20:43:37,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46809 states to 46809 states and 64687 transitions. [2020-10-26 20:43:37,515 INFO L78 Accepts]: Start accepts. Automaton has 46809 states and 64687 transitions. Word has length 287 [2020-10-26 20:43:37,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:37,515 INFO L481 AbstractCegarLoop]: Abstraction has 46809 states and 64687 transitions. [2020-10-26 20:43:37,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:43:37,516 INFO L276 IsEmpty]: Start isEmpty. Operand 46809 states and 64687 transitions. [2020-10-26 20:43:37,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-26 20:43:37,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:37,624 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:37,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:43:37,625 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:37,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:37,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1826364509, now seen corresponding path program 1 times [2020-10-26 20:43:37,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:37,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638459830] [2020-10-26 20:43:37,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:37,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:39,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:41,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:41,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-26 20:43:41,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:43:41,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3647 [2020-10-26 20:43:41,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:41,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 20:43:41,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:41,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 243 [2020-10-26 20:43:41,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:42,420 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 20:43:42,754 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 74 [2020-10-26 20:43:43,103 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 74 [2020-10-26 20:43:43,654 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 89 [2020-10-26 20:43:44,142 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 77 [2020-10-26 20:43:44,611 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 75 [2020-10-26 20:43:45,071 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 72 [2020-10-26 20:43:45,408 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 54 [2020-10-26 20:43:45,675 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:45,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:45,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:45,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:45,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:45,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:45,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:43:45,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:45,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:45,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:45,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:45,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:45,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:45,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:46,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:46,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:43:46,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:46,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-26 20:43:46,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:46,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:43:46,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:46,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:43:46,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:46,497 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 20:43:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 2 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:43:47,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638459830] [2020-10-26 20:43:47,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:47,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 20:43:47,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243904795] [2020-10-26 20:43:47,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 20:43:47,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:47,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 20:43:47,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:43:47,655 INFO L87 Difference]: Start difference. First operand 46809 states and 64687 transitions. Second operand 16 states. [2020-10-26 20:43:48,074 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-26 20:43:51,046 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 78 [2020-10-26 20:43:51,465 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-26 20:43:51,967 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-10-26 20:43:53,265 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 229 DAG size of output: 203 [2020-10-26 20:43:54,715 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 239 DAG size of output: 211 [2020-10-26 20:43:57,302 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 249 DAG size of output: 208 [2020-10-26 20:43:59,999 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 251 DAG size of output: 207 [2020-10-26 20:44:02,729 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 251 DAG size of output: 206 [2020-10-26 20:44:06,731 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 254 DAG size of output: 205 [2020-10-26 20:44:08,832 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 254 DAG size of output: 203 [2020-10-26 20:44:09,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:09,891 INFO L93 Difference]: Finished difference Result 72796 states and 100477 transitions. [2020-10-26 20:44:09,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 20:44:09,891 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 299 [2020-10-26 20:44:09,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:10,109 INFO L225 Difference]: With dead ends: 72796 [2020-10-26 20:44:10,110 INFO L226 Difference]: Without dead ends: 46894 [2020-10-26 20:44:10,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2020-10-26 20:44:10,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46894 states. [2020-10-26 20:44:11,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46894 to 46870. [2020-10-26 20:44:11,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46870 states. [2020-10-26 20:44:11,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46870 states to 46870 states and 64723 transitions. [2020-10-26 20:44:11,743 INFO L78 Accepts]: Start accepts. Automaton has 46870 states and 64723 transitions. Word has length 299 [2020-10-26 20:44:11,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:11,744 INFO L481 AbstractCegarLoop]: Abstraction has 46870 states and 64723 transitions. [2020-10-26 20:44:11,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 20:44:11,744 INFO L276 IsEmpty]: Start isEmpty. Operand 46870 states and 64723 transitions. [2020-10-26 20:44:11,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-26 20:44:11,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:11,816 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:44:11,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:44:11,816 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:11,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:11,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1192558982, now seen corresponding path program 1 times [2020-10-26 20:44:11,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:11,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251646679] [2020-10-26 20:44:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:11,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:12,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:13,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:14,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:14,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-26 20:44:14,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:44:14,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2926 [2020-10-26 20:44:14,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:14,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:14,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:44:14,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 20:44:14,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:15,160 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:15,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:15,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:15,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:15,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:15,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:15,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:44:15,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:15,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:44:15,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:15,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:44:15,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:15,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:15,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:15,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:15,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:44:15,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:15,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 20:44:15,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:15,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:15,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:15,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:44:15,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:15,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:44:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:15,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:15,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:15,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:44:15,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:15,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-26 20:44:15,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:15,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:15,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:15,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:44:15,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:44:16,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251646679] [2020-10-26 20:44:16,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:16,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:44:16,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575067284] [2020-10-26 20:44:16,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:44:16,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:16,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:44:16,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:44:16,147 INFO L87 Difference]: Start difference. First operand 46870 states and 64723 transitions. Second operand 8 states. [2020-10-26 20:44:16,627 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:44:17,915 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:44:20,290 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:44:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:22,152 INFO L93 Difference]: Finished difference Result 79775 states and 122938 transitions. [2020-10-26 20:44:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 20:44:22,153 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 302 [2020-10-26 20:44:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:22,481 INFO L225 Difference]: With dead ends: 79775 [2020-10-26 20:44:22,482 INFO L226 Difference]: Without dead ends: 54076 [2020-10-26 20:44:22,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-26 20:44:22,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54076 states. [2020-10-26 20:44:24,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54076 to 52464. [2020-10-26 20:44:24,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52464 states. [2020-10-26 20:44:25,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52464 states to 52464 states and 71704 transitions. [2020-10-26 20:44:25,077 INFO L78 Accepts]: Start accepts. Automaton has 52464 states and 71704 transitions. Word has length 302 [2020-10-26 20:44:25,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:25,079 INFO L481 AbstractCegarLoop]: Abstraction has 52464 states and 71704 transitions. [2020-10-26 20:44:25,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:44:25,079 INFO L276 IsEmpty]: Start isEmpty. Operand 52464 states and 71704 transitions. [2020-10-26 20:44:25,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-10-26 20:44:25,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:25,268 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:44:25,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:44:25,268 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:25,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:25,268 INFO L82 PathProgramCache]: Analyzing trace with hash 791040435, now seen corresponding path program 1 times [2020-10-26 20:44:25,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:25,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854529111] [2020-10-26 20:44:25,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:25,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:25,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:26,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:28,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:28,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 320 [2020-10-26 20:44:28,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:44:28,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2990 [2020-10-26 20:44:28,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:28,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:28,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-26 20:44:28,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 20:44:28,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:28,616 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:28,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:28,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:28,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:28,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:28,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:28,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:44:28,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:28,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:44:28,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:28,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:44:28,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:28,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:28,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:28,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:28,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:44:28,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:28,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:44:28,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:28,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:44:28,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:28,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:44:28,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:28,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:44:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:28,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:28,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:28,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 20:44:28,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:28,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:44:28,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:28,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:28,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:28,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 20:44:28,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:44:28,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 20:44:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:28,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:29,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:29,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:44:29,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:29,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-26 20:44:29,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:29,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:29,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:29,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:44:29,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:44:29,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854529111] [2020-10-26 20:44:29,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:29,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:44:29,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940549261] [2020-10-26 20:44:29,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:44:29,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:29,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:44:29,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:44:29,247 INFO L87 Difference]: Start difference. First operand 52464 states and 71704 transitions. Second operand 7 states. [2020-10-26 20:44:29,735 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:44:31,009 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:44:34,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:34,603 INFO L93 Difference]: Finished difference Result 99769 states and 147888 transitions. [2020-10-26 20:44:34,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:44:34,603 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 304 [2020-10-26 20:44:34,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:34,881 INFO L225 Difference]: With dead ends: 99769 [2020-10-26 20:44:34,881 INFO L226 Difference]: Without dead ends: 62109 [2020-10-26 20:44:35,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:44:35,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62109 states. [2020-10-26 20:44:37,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62109 to 57159. [2020-10-26 20:44:37,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57159 states. [2020-10-26 20:44:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57159 states to 57159 states and 77484 transitions. [2020-10-26 20:44:37,241 INFO L78 Accepts]: Start accepts. Automaton has 57159 states and 77484 transitions. Word has length 304 [2020-10-26 20:44:37,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:37,241 INFO L481 AbstractCegarLoop]: Abstraction has 57159 states and 77484 transitions. [2020-10-26 20:44:37,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:44:37,242 INFO L276 IsEmpty]: Start isEmpty. Operand 57159 states and 77484 transitions. [2020-10-26 20:44:37,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-10-26 20:44:37,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:37,517 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 20:44:37,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:44:37,518 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:37,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:37,518 INFO L82 PathProgramCache]: Analyzing trace with hash -636055806, now seen corresponding path program 1 times [2020-10-26 20:44:37,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:37,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859664842] [2020-10-26 20:44:37,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:37,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:37,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:39,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:40,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:40,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 330 [2020-10-26 20:44:40,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:44:40,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2808 [2020-10-26 20:44:40,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:40,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:40,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-26 20:44:40,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 20:44:40,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:40,741 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:40,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:40,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:40,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:40,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:40,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:40,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:44:40,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:40,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:44:40,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:40,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:44:40,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:40,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:40,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:40,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:40,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:44:40,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:40,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 20:44:40,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:40,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:40,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:40,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 20:44:40,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:40,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 20:44:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:40,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:41,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:41,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:44:41,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:41,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-26 20:44:41,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:41,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:41,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:41,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:44:41,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:44:41,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859664842] [2020-10-26 20:44:41,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:41,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:44:41,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116875557] [2020-10-26 20:44:41,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:44:41,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:41,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:44:41,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:44:41,448 INFO L87 Difference]: Start difference. First operand 57159 states and 77484 transitions. Second operand 7 states. [2020-10-26 20:44:41,710 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:44:42,595 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 159