/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/Problem04_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:55:40,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:55:40,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:55:40,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:55:40,719 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:55:40,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:55:40,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:55:40,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:55:40,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:55:40,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:55:40,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:55:40,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:55:40,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:55:40,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:55:40,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:55:40,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:55:40,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:55:40,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:55:40,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:55:40,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:55:40,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:55:40,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:55:40,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:55:40,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:55:40,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:55:40,766 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:55:40,766 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:55:40,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:55:40,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:55:40,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:55:40,769 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:55:40,770 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:55:40,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:55:40,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:55:40,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:55:40,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:55:40,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:55:40,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:55:40,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:55:40,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:55:40,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:55:40,779 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 20:55:40,808 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:55:40,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:55:40,810 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:55:40,810 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:55:40,810 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:55:40,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:55:40,811 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:55:40,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:55:40,811 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:55:40,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:55:40,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:55:40,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:55:40,812 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:55:40,812 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:55:40,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:55:40,813 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:55:40,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:55:40,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:55:40,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:55:40,814 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:55:40,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:55:40,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:55:40,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:55:40,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:55:40,815 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:55:40,815 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:55:40,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:55:40,816 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:55:40,816 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:55:40,816 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:55:41,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:55:41,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:55:41,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:55:41,292 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:55:41,293 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:55:41,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label08.c [2020-10-26 20:55:41,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1dc3596aa/7bfe8732a2eb4a34a9cd5ce438f966b2/FLAGb67746408 [2020-10-26 20:55:42,467 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:55:42,467 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label08.c [2020-10-26 20:55:42,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1dc3596aa/7bfe8732a2eb4a34a9cd5ce438f966b2/FLAGb67746408 [2020-10-26 20:55:42,928 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1dc3596aa/7bfe8732a2eb4a34a9cd5ce438f966b2 [2020-10-26 20:55:42,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:55:42,938 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:55:42,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:55:42,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:55:42,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:55:42,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:55:42" (1/1) ... [2020-10-26 20:55:42,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c5a2305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:42, skipping insertion in model container [2020-10-26 20:55:42,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:55:42" (1/1) ... [2020-10-26 20:55:42,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:55:43,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:55:44,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:55:44,565 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:55:45,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:55:45,582 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:55:45,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:45 WrapperNode [2020-10-26 20:55:45,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:55:45,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:55:45,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:55:45,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:55:45,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:45" (1/1) ... [2020-10-26 20:55:45,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:45" (1/1) ... [2020-10-26 20:55:45,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:45" (1/1) ... [2020-10-26 20:55:45,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:45" (1/1) ... [2020-10-26 20:55:45,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:45" (1/1) ... [2020-10-26 20:55:45,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:45" (1/1) ... [2020-10-26 20:55:45,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:45" (1/1) ... [2020-10-26 20:55:45,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:55:45,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:55:45,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:55:45,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:55:45,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:45" (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 20:55:46,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:55:46,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:55:46,053 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:55:46,053 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:55:46,054 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 20:55:46,054 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 20:55:46,054 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 20:55:46,054 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:55:46,054 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:55:46,054 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 20:55:46,055 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 20:55:46,055 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 20:55:46,055 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:55:46,055 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:55:46,055 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:55:46,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:55:46,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:55:46,056 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:55:46,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:55:46,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:55:46,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:55:46,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:55:46,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:55:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:55:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:55:53,950 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:55:53,950 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:55:53,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:55:53 BoogieIcfgContainer [2020-10-26 20:55:53,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:55:53,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:55:53,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:55:53,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:55:53,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:55:42" (1/3) ... [2020-10-26 20:55:53,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a47bd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:55:53, skipping insertion in model container [2020-10-26 20:55:53,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:45" (2/3) ... [2020-10-26 20:55:53,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a47bd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:55:53, skipping insertion in model container [2020-10-26 20:55:53,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:55:53" (3/3) ... [2020-10-26 20:55:53,963 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label08.c [2020-10-26 20:55:53,976 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:55:53,990 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:55:54,002 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:55:54,038 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:55:54,038 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:55:54,038 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:55:54,038 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:55:54,038 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:55:54,039 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:55:54,039 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:55:54,039 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:55:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-26 20:55:54,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 821 [2020-10-26 20:55:54,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:54,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:55:54,130 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:54,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:54,138 INFO L82 PathProgramCache]: Analyzing trace with hash 192078372, now seen corresponding path program 1 times [2020-10-26 20:55:54,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:54,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929974165] [2020-10-26 20:55:54,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:55,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:57,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:59,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:59,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 836 [2020-10-26 20:55:59,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:55:59,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-26 20:55:59,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:59,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 20:55:59,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:55:59,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 742 [2020-10-26 20:55:59,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:56:01,490 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-26 20:56:01,660 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-26 20:56:01,887 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-26 20:56:02,057 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-10-26 20:56:02,212 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-10-26 20:56:02,364 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-26 20:56:03,259 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 20:56:03,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:03,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:03,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:03,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:03,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:03,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:56:03,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:03,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:03,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:03,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:03,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:08,468 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 20:56:08,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929974165] [2020-10-26 20:56:08,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:56:08,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-26 20:56:08,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856563303] [2020-10-26 20:56:08,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 20:56:08,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:08,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 20:56:08,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-26 20:56:08,496 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 18 states. [2020-10-26 20:56:08,917 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-26 20:56:09,312 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-26 20:56:09,707 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-26 20:56:10,138 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-26 20:56:10,851 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-26 20:56:11,441 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-26 20:56:15,642 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-26 20:56:16,566 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 123 [2020-10-26 20:56:20,285 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-26 20:56:21,019 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2020-10-26 20:56:23,548 WARN L193 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 113 [2020-10-26 20:56:30,369 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-26 20:56:30,719 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-26 20:56:39,839 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-26 20:56:40,188 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-26 20:56:45,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:45,120 INFO L93 Difference]: Finished difference Result 2553 states and 4911 transitions. [2020-10-26 20:56:45,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 20:56:45,123 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 820 [2020-10-26 20:56:45,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:45,161 INFO L225 Difference]: With dead ends: 2553 [2020-10-26 20:56:45,162 INFO L226 Difference]: Without dead ends: 1581 [2020-10-26 20:56:45,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 20:56:45,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2020-10-26 20:56:45,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1581. [2020-10-26 20:56:45,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1581 states. [2020-10-26 20:56:45,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2340 transitions. [2020-10-26 20:56:45,365 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2340 transitions. Word has length 820 [2020-10-26 20:56:45,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:45,369 INFO L481 AbstractCegarLoop]: Abstraction has 1581 states and 2340 transitions. [2020-10-26 20:56:45,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 20:56:45,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2340 transitions. [2020-10-26 20:56:45,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2020-10-26 20:56:45,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:45,416 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 20:56:45,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:56:45,417 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:45,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:45,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1030772651, now seen corresponding path program 1 times [2020-10-26 20:56:45,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:45,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946538198] [2020-10-26 20:56:45,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:45,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:46,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:50,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:50,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 857 [2020-10-26 20:56:50,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:56:50,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-26 20:56:50,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:50,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 20:56:50,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-26 20:56:50,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 705 [2020-10-26 20:56:50,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:53,941 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2020-10-26 20:56:54,065 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2020-10-26 20:56:54,257 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 27 [2020-10-26 20:56:54,555 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2020-10-26 20:56:54,823 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 34 [2020-10-26 20:56:55,154 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2020-10-26 20:56:55,626 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-26 20:56:55,976 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 36 [2020-10-26 20:56:56,324 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 36 [2020-10-26 20:56:56,613 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 29 [2020-10-26 20:56:57,121 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2020-10-26 20:56:57,381 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2020-10-26 20:56:57,624 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 20:56:57,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:57,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:57,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:57,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:57,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:57,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:56:57,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:57,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:56:57,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:57,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:56:57,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:57,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:57,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:57,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:57,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:56:57,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:57,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 20:56:57,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:57,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:57,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:57,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 20:56:57,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:57:03,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946538198] [2020-10-26 20:57:03,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:57:03,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 20:57:03,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244132757] [2020-10-26 20:57:03,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 20:57:03,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:03,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 20:57:03,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-26 20:57:03,671 INFO L87 Difference]: Start difference. First operand 1581 states and 2340 transitions. Second operand 19 states. [2020-10-26 20:57:04,452 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-26 20:57:04,828 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-26 20:57:05,656 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-26 20:57:12,189 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-26 20:57:14,891 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-26 20:57:18,118 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 114 [2020-10-26 20:57:19,244 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-26 20:57:19,695 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-26 20:57:22,763 WARN L193 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 116 [2020-10-26 20:57:33,342 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-26 20:57:33,770 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-26 20:57:46,894 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-26 20:57:47,344 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-26 20:57:52,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:57:52,154 INFO L93 Difference]: Finished difference Result 3125 states and 5330 transitions. [2020-10-26 20:57:52,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 20:57:52,158 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 839 [2020-10-26 20:57:52,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:57:52,172 INFO L225 Difference]: With dead ends: 3125 [2020-10-26 20:57:52,172 INFO L226 Difference]: Without dead ends: 2277 [2020-10-26 20:57:52,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2020-10-26 20:57:52,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2020-10-26 20:57:52,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 2277. [2020-10-26 20:57:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2277 states. [2020-10-26 20:57:52,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 3046 transitions. [2020-10-26 20:57:52,248 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 3046 transitions. Word has length 839 [2020-10-26 20:57:52,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:57:52,249 INFO L481 AbstractCegarLoop]: Abstraction has 2277 states and 3046 transitions. [2020-10-26 20:57:52,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 20:57:52,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 3046 transitions. [2020-10-26 20:57:52,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 847 [2020-10-26 20:57:52,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:57:52,262 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:57:52,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:57:52,262 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:57:52,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:57:52,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1263454014, now seen corresponding path program 1 times [2020-10-26 20:57:52,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:57:52,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416159185] [2020-10-26 20:57:52,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:57:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:52,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:52,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:56,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:57,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:57,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 864 [2020-10-26 20:57:57,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:57:57,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-26 20:57:57,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:57,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:57:57,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:57:57,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 855 [2020-10-26 20:57:57,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:58,520 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 20:57:58,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:57:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:58,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:58,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:58,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:57:58,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:58,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:57:58,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:58,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:57:58,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:58,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:57:58,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:57:58,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:57:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:58,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:58,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:58,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:58,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 20:57:58,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:57:58,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-26 20:57:58,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:58,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:58,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:58,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 20:57:58,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:57:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:57:59,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416159185] [2020-10-26 20:57:59,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:57:59,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:57:59,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688086218] [2020-10-26 20:57:59,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:57:59,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:59,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:57:59,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:57:59,652 INFO L87 Difference]: Start difference. First operand 2277 states and 3046 transitions. Second operand 7 states. [2020-10-26 20:57:59,910 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 20:58:00,959 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 20:58:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:58:28,387 INFO L93 Difference]: Finished difference Result 5533 states and 8620 transitions. [2020-10-26 20:58:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:58:28,389 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 846 [2020-10-26 20:58:28,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:58:28,411 INFO L225 Difference]: With dead ends: 5533 [2020-10-26 20:58:28,411 INFO L226 Difference]: Without dead ends: 3989 [2020-10-26 20:58:28,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:58:28,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3989 states. [2020-10-26 20:58:28,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3989 to 3969. [2020-10-26 20:58:28,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3969 states. [2020-10-26 20:58:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3969 states to 3969 states and 5640 transitions. [2020-10-26 20:58:28,528 INFO L78 Accepts]: Start accepts. Automaton has 3969 states and 5640 transitions. Word has length 846 [2020-10-26 20:58:28,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:58:28,530 INFO L481 AbstractCegarLoop]: Abstraction has 3969 states and 5640 transitions. [2020-10-26 20:58:28,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:58:28,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3969 states and 5640 transitions. [2020-10-26 20:58:28,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 855 [2020-10-26 20:58:28,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:58:28,546 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:28,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:58:28,547 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:58:28,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:58:28,547 INFO L82 PathProgramCache]: Analyzing trace with hash 940960164, now seen corresponding path program 1 times [2020-10-26 20:58:28,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:58:28,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794342701] [2020-10-26 20:58:28,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:58:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:28,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:29,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:31,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:33,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:33,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 874 [2020-10-26 20:58:33,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:58:33,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 20:58:33,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:33,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:58:33,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:58:33,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 20:58:33,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:34,111 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 20:58:34,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:58:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:34,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:34,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:34,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:58:34,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:34,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:58:34,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:34,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:58:34,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:58:34,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:58:34,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:34,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:58:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:34,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:34,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:34,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:34,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 20:58:34,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:58:34,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-26 20:58:34,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:34,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:58:34,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:58:34,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 20:58:34,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:34,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 20:58:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:34,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:34,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:34,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 20:58:34,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:34,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:58:34,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:34,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:58:34,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:58:34,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 20:58:34,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:58:34,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794342701] [2020-10-26 20:58:34,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:58:34,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:58:34,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652365335] [2020-10-26 20:58:34,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:58:34,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:58:34,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:58:34,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:58:34,934 INFO L87 Difference]: Start difference. First operand 3969 states and 5640 transitions. Second operand 8 states. [2020-10-26 20:58:35,216 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-26 20:58:38,918 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-26 20:58:54,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:58:54,447 INFO L93 Difference]: Finished difference Result 8191 states and 11905 transitions. [2020-10-26 20:58:54,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:58:54,448 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 854 [2020-10-26 20:58:54,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:58:54,474 INFO L225 Difference]: With dead ends: 8191 [2020-10-26 20:58:54,474 INFO L226 Difference]: Without dead ends: 4955 [2020-10-26 20:58:54,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:58:54,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4955 states. [2020-10-26 20:58:54,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4955 to 4869. [2020-10-26 20:58:54,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4869 states. [2020-10-26 20:58:54,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4869 states to 4869 states and 6702 transitions. [2020-10-26 20:58:54,632 INFO L78 Accepts]: Start accepts. Automaton has 4869 states and 6702 transitions. Word has length 854 [2020-10-26 20:58:54,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:58:54,632 INFO L481 AbstractCegarLoop]: Abstraction has 4869 states and 6702 transitions. [2020-10-26 20:58:54,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:58:54,632 INFO L276 IsEmpty]: Start isEmpty. Operand 4869 states and 6702 transitions. [2020-10-26 20:58:54,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2020-10-26 20:58:54,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:58:54,653 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:58:54,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:58:54,653 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:58:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:58:54,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1234878120, now seen corresponding path program 1 times [2020-10-26 20:58:54,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:58:54,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048831675] [2020-10-26 20:58:54,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:58:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:54,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:57,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:58,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:58,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 876 [2020-10-26 20:58:58,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:58:58,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3959 [2020-10-26 20:58:58,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:58,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:58:58,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-26 20:58:58,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 786 [2020-10-26 20:58:58,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:59,668 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 20:58:59,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:58:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:59,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:59,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:59,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:58:59,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:59,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:58:59,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:59,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:58:59,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:58:59,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:58:59,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:59,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:58:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:59,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:59,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:59,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:58:59,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:59,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 20:58:59,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:59,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:58:59,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:58:59,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:58:59,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:59,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 20:58:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:59,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:59,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:59,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:58:59,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:59,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:58:59,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:59,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:58:59,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:58:59,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:58:59,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 20:59:03,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048831675] [2020-10-26 20:59:03,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:59:03,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:59:03,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58499602] [2020-10-26 20:59:03,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:59:03,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:59:03,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:59:03,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:59:03,590 INFO L87 Difference]: Start difference. First operand 4869 states and 6702 transitions. Second operand 5 states. [2020-10-26 20:59:04,190 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-26 20:59:22,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:59:22,346 INFO L93 Difference]: Finished difference Result 9829 states and 14299 transitions. [2020-10-26 20:59:22,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:59:22,348 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 856 [2020-10-26 20:59:22,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:59:22,371 INFO L225 Difference]: With dead ends: 9829 [2020-10-26 20:59:22,371 INFO L226 Difference]: Without dead ends: 4885 [2020-10-26 20:59:22,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 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 20:59:22,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4885 states. [2020-10-26 20:59:22,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4885 to 4866. [2020-10-26 20:59:22,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4866 states. [2020-10-26 20:59:22,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4866 states to 4866 states and 5582 transitions. [2020-10-26 20:59:22,513 INFO L78 Accepts]: Start accepts. Automaton has 4866 states and 5582 transitions. Word has length 856 [2020-10-26 20:59:22,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:59:22,514 INFO L481 AbstractCegarLoop]: Abstraction has 4866 states and 5582 transitions. [2020-10-26 20:59:22,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:59:22,514 INFO L276 IsEmpty]: Start isEmpty. Operand 4866 states and 5582 transitions. [2020-10-26 20:59:22,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 862 [2020-10-26 20:59:22,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:59:22,534 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:59:22,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:59:22,535 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:59:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:59:22,536 INFO L82 PathProgramCache]: Analyzing trace with hash -427633985, now seen corresponding path program 1 times [2020-10-26 20:59:22,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:59:22,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237708696] [2020-10-26 20:59:22,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:59:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:22,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:22,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:24,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:26,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:27,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:27,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 881 [2020-10-26 20:59:27,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:59:27,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-26 20:59:27,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:27,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:59:27,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:59:27,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-26 20:59:27,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:27,969 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 20:59:27,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:59:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:27,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:27,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:27,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:59:27,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:59:27,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:59:27,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:27,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:59:27,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:59:27,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:59:27,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:28,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:59:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:28,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:28,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:28,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:28,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 20:59:28,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:59:28,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 20:59:28,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:28,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:59:28,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:59:28,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 20:59:28,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:28,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 20:59:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:28,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:28,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:28,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 20:59:28,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:59:28,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:59:28,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:28,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:59:28,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:59:28,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:59:28,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:59:28,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237708696] [2020-10-26 20:59:28,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:59:28,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:59:28,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260809549] [2020-10-26 20:59:28,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:59:28,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:59:28,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:59:28,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:59:28,616 INFO L87 Difference]: Start difference. First operand 4866 states and 5582 transitions. Second operand 8 states. [2020-10-26 20:59:28,855 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 93