/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/Problem05_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:10:18,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:10:18,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:10:18,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:10:18,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:10:18,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:10:18,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:10:18,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:10:18,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:10:18,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:10:18,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:10:18,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:10:18,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:10:18,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:10:18,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:10:18,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:10:18,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:10:18,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:10:18,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:10:18,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:10:18,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:10:18,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:10:18,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:10:18,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:10:18,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:10:18,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:10:18,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:10:18,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:10:18,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:10:18,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:10:18,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:10:18,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:10:18,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:10:18,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:10:18,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:10:18,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:10:18,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:10:18,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:10:18,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:10:18,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:10:18,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:10:18,448 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 21:10:18,497 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:10:18,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:10:18,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:10:18,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:10:18,503 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:10:18,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:10:18,503 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:10:18,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:10:18,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:10:18,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:10:18,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:10:18,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:10:18,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:10:18,506 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:10:18,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:10:18,506 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:10:18,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:10:18,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:10:18,507 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:10:18,507 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:10:18,507 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:10:18,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:10:18,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:10:18,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:10:18,508 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:10:18,508 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:10:18,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:10:18,508 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:10:18,508 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:10:18,509 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:10:18,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:10:18,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:10:18,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:10:18,968 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:10:18,968 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:10:18,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label04.c [2020-10-26 21:10:19,051 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/925f960aa/e4e96f1308cd4db58a07cf6d71400fb9/FLAG75dd882e9 [2020-10-26 21:10:20,363 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:10:20,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label04.c [2020-10-26 21:10:20,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/925f960aa/e4e96f1308cd4db58a07cf6d71400fb9/FLAG75dd882e9 [2020-10-26 21:10:20,426 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/925f960aa/e4e96f1308cd4db58a07cf6d71400fb9 [2020-10-26 21:10:20,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:10:20,436 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:10:20,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:10:20,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:10:20,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:10:20,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:10:20" (1/1) ... [2020-10-26 21:10:20,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f9a9cc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:20, skipping insertion in model container [2020-10-26 21:10:20,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:10:20" (1/1) ... [2020-10-26 21:10:20,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:10:20,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:10:23,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:10:23,164 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:10:24,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:10:24,561 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:10:24,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:24 WrapperNode [2020-10-26 21:10:24,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:10:24,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:10:24,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:10:24,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:10:24,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:24" (1/1) ... [2020-10-26 21:10:24,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:24" (1/1) ... [2020-10-26 21:10:24,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:24" (1/1) ... [2020-10-26 21:10:24,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:24" (1/1) ... [2020-10-26 21:10:24,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:24" (1/1) ... [2020-10-26 21:10:25,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:24" (1/1) ... [2020-10-26 21:10:25,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:24" (1/1) ... [2020-10-26 21:10:25,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:10:25,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:10:25,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:10:25,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:10:25,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:10:25,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:10:25,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:10:25,436 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:10:25,436 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:10:25,437 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:10:25,437 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:10:25,437 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:10:25,437 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:10:25,437 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-26 21:10:25,437 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output7 [2020-10-26 21:10:25,437 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output8 [2020-10-26 21:10:25,438 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:10:25,438 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:10:25,438 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:10:25,438 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:10:25,438 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:10:25,438 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:10:25,439 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-26 21:10:25,439 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output7 [2020-10-26 21:10:25,439 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output8 [2020-10-26 21:10:25,439 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:10:25,439 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:10:25,439 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:10:25,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:10:25,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:10:25,440 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:10:25,440 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:10:25,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:10:25,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:10:25,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:10:25,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:10:25,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:10:25,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:10:35,695 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:10:35,696 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:10:35,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:10:35 BoogieIcfgContainer [2020-10-26 21:10:35,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:10:35,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:10:35,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:10:35,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:10:35,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:10:20" (1/3) ... [2020-10-26 21:10:35,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99ac57d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:10:35, skipping insertion in model container [2020-10-26 21:10:35,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:24" (2/3) ... [2020-10-26 21:10:35,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99ac57d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:10:35, skipping insertion in model container [2020-10-26 21:10:35,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:10:35" (3/3) ... [2020-10-26 21:10:35,710 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label04.c [2020-10-26 21:10:35,722 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:10:35,728 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:10:35,742 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:10:35,779 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:10:35,779 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:10:35,779 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:10:35,780 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:10:35,780 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:10:35,780 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:10:35,780 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:10:35,780 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:10:35,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states. [2020-10-26 21:10:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1714 [2020-10-26 21:10:35,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:10:35,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:10:35,972 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:10:35,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:10:35,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1267193593, now seen corresponding path program 1 times [2020-10-26 21:10:35,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:10:35,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203681434] [2020-10-26 21:10:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:10:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:10:37,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:10:42,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:10:42,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1737 [2020-10-26 21:10:42,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:10:42,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5083 [2020-10-26 21:10:42,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:10:42,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 21:10:42,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:10:42,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1728 [2020-10-26 21:10:42,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 21:10:44,156 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-26 21:10:44,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:10:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:10:44,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:10:44,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:10:44,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:10:44,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:10:44,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 21:10:44,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:10:44,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:10:44,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:10:44,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:10:44,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:10:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:10:47,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203681434] [2020-10-26 21:10:47,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:10:47,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 21:10:47,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831600932] [2020-10-26 21:10:47,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 21:10:47,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:10:47,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 21:10:47,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 21:10:47,085 INFO L87 Difference]: Start difference. First operand 2226 states. Second operand 4 states. [2020-10-26 21:11:07,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:11:07,130 INFO L93 Difference]: Finished difference Result 6365 states and 11967 transitions. [2020-10-26 21:11:07,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 21:11:07,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1713 [2020-10-26 21:11:07,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:11:07,194 INFO L225 Difference]: With dead ends: 6365 [2020-10-26 21:11:07,194 INFO L226 Difference]: Without dead ends: 4075 [2020-10-26 21:11:07,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 21:11:07,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4075 states. [2020-10-26 21:11:07,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4075 to 4005. [2020-10-26 21:11:07,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4005 states. [2020-10-26 21:11:07,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4005 states to 4005 states and 6505 transitions. [2020-10-26 21:11:07,435 INFO L78 Accepts]: Start accepts. Automaton has 4005 states and 6505 transitions. Word has length 1713 [2020-10-26 21:11:07,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:11:07,440 INFO L481 AbstractCegarLoop]: Abstraction has 4005 states and 6505 transitions. [2020-10-26 21:11:07,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 21:11:07,440 INFO L276 IsEmpty]: Start isEmpty. Operand 4005 states and 6505 transitions. [2020-10-26 21:11:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1725 [2020-10-26 21:11:07,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:11:07,561 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:11:07,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:11:07,562 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:11:07,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:11:07,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1660301569, now seen corresponding path program 1 times [2020-10-26 21:11:07,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:11:07,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114594212] [2020-10-26 21:11:07,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:11:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:11:08,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:11:09,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:11:13,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:11:13,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1750 [2020-10-26 21:11:13,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:11:13,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5119 [2020-10-26 21:11:13,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:11:13,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:11:13,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:11:13,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 21:11:13,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:11:14,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:11:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:11:14,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:11:14,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:11:14,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:11:14,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:11:14,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 21:11:14,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:11:14,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:11:14,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:11:14,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:11:14,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:11:14,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:11:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:11:14,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:11:14,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:11:14,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 21:11:14,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:11:14,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 21:11:14,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:11:14,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:11:14,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:11:14,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 21:11:14,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:11:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:11:16,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114594212] [2020-10-26 21:11:16,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:11:16,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 21:11:16,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477083282] [2020-10-26 21:11:16,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:11:16,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:11:16,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:11:16,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:11:16,299 INFO L87 Difference]: Start difference. First operand 4005 states and 6505 transitions. Second operand 8 states. [2020-10-26 21:11:53,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:11:53,890 INFO L93 Difference]: Finished difference Result 15396 states and 25464 transitions. [2020-10-26 21:11:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 21:11:53,895 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1724 [2020-10-26 21:11:53,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:11:53,961 INFO L225 Difference]: With dead ends: 15396 [2020-10-26 21:11:53,961 INFO L226 Difference]: Without dead ends: 11397 [2020-10-26 21:11:53,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 21:11:53,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11397 states. [2020-10-26 21:11:54,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11397 to 11284. [2020-10-26 21:11:54,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11284 states. [2020-10-26 21:11:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11284 states to 11284 states and 15190 transitions. [2020-10-26 21:11:54,365 INFO L78 Accepts]: Start accepts. Automaton has 11284 states and 15190 transitions. Word has length 1724 [2020-10-26 21:11:54,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:11:54,366 INFO L481 AbstractCegarLoop]: Abstraction has 11284 states and 15190 transitions. [2020-10-26 21:11:54,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:11:54,366 INFO L276 IsEmpty]: Start isEmpty. Operand 11284 states and 15190 transitions. [2020-10-26 21:11:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1736 [2020-10-26 21:11:54,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:11:54,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:11:54,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:11:54,436 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:11:54,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:11:54,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1760122216, now seen corresponding path program 1 times [2020-10-26 21:11:54,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:11:54,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231710550] [2020-10-26 21:11:54,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:11:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:11:55,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:11:55,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:11:58,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:11:59,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:11:59,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1761 [2020-10-26 21:11:59,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:11:59,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-26 21:11:59,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:11:59,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:11:59,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:11:59,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 21:11:59,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:12:00,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:12:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:12:00,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:12:00,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:12:00,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:12:00,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:12:00,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 21:12:00,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:12:00,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:12:00,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:12:00,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:12:00,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:12:00,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:12:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:12:00,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:12:00,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:12:00,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-26 21:12:00,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:12:00,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-26 21:12:00,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:12:00,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:12:00,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:12:00,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 21:12:00,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:12:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:12:01,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231710550] [2020-10-26 21:12:01,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:12:01,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:12:01,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223505522] [2020-10-26 21:12:01,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:12:01,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:12:01,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:12:01,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:12:01,956 INFO L87 Difference]: Start difference. First operand 11284 states and 15190 transitions. Second operand 7 states. [2020-10-26 21:12:29,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:12:29,606 INFO L93 Difference]: Finished difference Result 28648 states and 38476 transitions. [2020-10-26 21:12:29,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 21:12:29,611 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1735 [2020-10-26 21:12:29,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:12:29,694 INFO L225 Difference]: With dead ends: 28648 [2020-10-26 21:12:29,694 INFO L226 Difference]: Without dead ends: 17370 [2020-10-26 21:12:29,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:12:29,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17370 states. [2020-10-26 21:12:30,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17370 to 17150. [2020-10-26 21:12:30,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17150 states. [2020-10-26 21:12:30,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17150 states to 17150 states and 22270 transitions. [2020-10-26 21:12:30,226 INFO L78 Accepts]: Start accepts. Automaton has 17150 states and 22270 transitions. Word has length 1735 [2020-10-26 21:12:30,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:12:30,226 INFO L481 AbstractCegarLoop]: Abstraction has 17150 states and 22270 transitions. [2020-10-26 21:12:30,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:12:30,227 INFO L276 IsEmpty]: Start isEmpty. Operand 17150 states and 22270 transitions. [2020-10-26 21:12:30,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1746 [2020-10-26 21:12:30,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:12:30,306 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:12:30,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 21:12:30,306 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:12:30,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:12:30,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1474050739, now seen corresponding path program 1 times [2020-10-26 21:12:30,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:12:30,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737303936] [2020-10-26 21:12:30,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:12:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:12:31,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:12:31,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:12:35,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:12:35,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1771 [2020-10-26 21:12:35,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:12:35,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-26 21:12:35,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:12:35,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:12:35,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:12:35,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 21:12:35,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:12:36,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:12:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:12:36,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:12:36,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:12:36,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:12:36,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:12:36,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 21:12:36,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:12:36,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:12:36,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:12:36,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:12:36,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:12:36,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:12:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:12:36,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:12:36,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:12:36,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 21:12:36,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:12:36,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-26 21:12:36,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:12:36,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:12:36,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:12:36,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 21:12:36,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:12:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:12:37,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737303936] [2020-10-26 21:12:37,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:12:37,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:12:37,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344828949] [2020-10-26 21:12:37,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:12:37,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:12:37,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:12:37,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:12:37,943 INFO L87 Difference]: Start difference. First operand 17150 states and 22270 transitions. Second operand 7 states. [2020-10-26 21:13:06,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:13:06,806 INFO L93 Difference]: Finished difference Result 45626 states and 61274 transitions. [2020-10-26 21:13:06,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 21:13:06,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1745 [2020-10-26 21:13:06,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:13:06,930 INFO L225 Difference]: With dead ends: 45626 [2020-10-26 21:13:06,930 INFO L226 Difference]: Without dead ends: 28482 [2020-10-26 21:13:06,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:13:07,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28482 states. [2020-10-26 21:13:07,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28482 to 28386. [2020-10-26 21:13:07,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28386 states. [2020-10-26 21:13:07,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28386 states to 28386 states and 36080 transitions. [2020-10-26 21:13:07,678 INFO L78 Accepts]: Start accepts. Automaton has 28386 states and 36080 transitions. Word has length 1745 [2020-10-26 21:13:07,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:13:07,679 INFO L481 AbstractCegarLoop]: Abstraction has 28386 states and 36080 transitions. [2020-10-26 21:13:07,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:13:07,679 INFO L276 IsEmpty]: Start isEmpty. Operand 28386 states and 36080 transitions. [2020-10-26 21:13:07,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1827 [2020-10-26 21:13:07,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:13:07,793 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:13:07,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 21:13:07,793 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:13:07,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:13:07,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1573570547, now seen corresponding path program 1 times [2020-10-26 21:13:07,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:13:07,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057214513] [2020-10-26 21:13:07,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:13:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:13:08,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:13,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:13,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:13:13,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1852 [2020-10-26 21:13:13,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:13:13,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-26 21:13:13,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:13:13,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 21:13:13,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:13:13,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1843 [2020-10-26 21:13:13,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:13:14,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:13:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:13:14,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:14,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:13:14,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:13:14,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:13:14,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 21:13:14,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:13:14,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:13:14,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:13:14,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:13:14,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:13:14,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:13:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:13:14,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:14,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:14,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:13:14,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 21:13:14,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:13:14,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-26 21:13:14,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:13:14,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:13:14,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:13:14,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 21:13:14,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:13:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 106 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 21:13:17,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057214513] [2020-10-26 21:13:17,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:13:17,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 21:13:17,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714119666] [2020-10-26 21:13:17,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 21:13:17,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:13:17,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 21:13:17,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 21:13:17,726 INFO L87 Difference]: Start difference. First operand 28386 states and 36080 transitions. Second operand 6 states. [2020-10-26 21:13:42,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:13:42,649 INFO L93 Difference]: Finished difference Result 84524 states and 111687 transitions. [2020-10-26 21:13:42,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 21:13:42,650 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1826 [2020-10-26 21:13:42,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:13:42,841 INFO L225 Difference]: With dead ends: 84524 [2020-10-26 21:13:42,842 INFO L226 Difference]: Without dead ends: 56144 [2020-10-26 21:13:42,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:13:42,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56144 states. [2020-10-26 21:13:43,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56144 to 52480. [2020-10-26 21:13:43,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52480 states. [2020-10-26 21:13:44,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52480 states to 52480 states and 66251 transitions. [2020-10-26 21:13:44,104 INFO L78 Accepts]: Start accepts. Automaton has 52480 states and 66251 transitions. Word has length 1826 [2020-10-26 21:13:44,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:13:44,106 INFO L481 AbstractCegarLoop]: Abstraction has 52480 states and 66251 transitions. [2020-10-26 21:13:44,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 21:13:44,106 INFO L276 IsEmpty]: Start isEmpty. Operand 52480 states and 66251 transitions. [2020-10-26 21:13:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1849 [2020-10-26 21:13:44,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:13:44,251 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:13:44,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 21:13:44,251 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:13:44,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:13:44,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1611316206, now seen corresponding path program 1 times [2020-10-26 21:13:44,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:13:44,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988940226] [2020-10-26 21:13:44,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:13:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:13:44,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:45,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:46,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:49,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:13:49,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1876 [2020-10-26 21:13:49,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:13:49,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5215 [2020-10-26 21:13:49,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:13:49,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:13:49,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 123 [2020-10-26 21:13:49,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 21:13:49,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:13:50,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:13:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:13:50,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:50,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:13:50,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:13:50,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:13:50,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 21:13:50,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:13:50,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:13:50,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:13:50,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:13:50,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:13:50,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:13:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:13:50,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:50,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:13:50,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 21:13:50,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:13:50,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-26 21:13:50,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:13:50,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:13:50,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:13:50,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 21:13:50,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:13:50,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-10-26 21:13:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:13:50,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:50,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:13:50,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-26 21:13:50,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:13:50,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 21:13:50,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:13:50,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:13:50,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:13:50,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 21:13:50,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:13:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 21:13:51,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988940226] [2020-10-26 21:13:51,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:13:51,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:13:51,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457687519] [2020-10-26 21:13:51,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:13:51,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:13:51,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:13:51,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:13:51,945 INFO L87 Difference]: Start difference. First operand 52480 states and 66251 transitions. Second operand 7 states.