/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 16:02:29,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 16:02:29,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 16:02:29,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 16:02:29,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 16:02:29,824 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 16:02:29,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 16:02:29,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 16:02:29,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 16:02:29,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 16:02:29,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 16:02:29,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 16:02:29,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 16:02:29,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 16:02:29,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 16:02:29,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 16:02:29,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 16:02:29,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 16:02:29,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 16:02:29,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 16:02:29,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 16:02:29,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 16:02:29,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 16:02:29,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 16:02:29,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 16:02:29,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 16:02:29,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 16:02:29,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 16:02:29,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 16:02:29,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 16:02:29,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 16:02:29,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 16:02:29,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 16:02:29,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 16:02:29,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 16:02:29,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 16:02:29,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 16:02:29,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 16:02:29,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 16:02:29,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 16:02:29,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 16:02:29,914 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 16:02:29,968 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 16:02:29,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 16:02:29,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 16:02:29,970 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 16:02:29,970 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 16:02:29,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 16:02:29,970 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 16:02:29,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 16:02:29,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 16:02:29,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 16:02:29,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 16:02:29,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 16:02:29,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 16:02:29,972 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 16:02:29,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 16:02:29,972 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 16:02:29,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 16:02:29,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 16:02:29,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 16:02:29,973 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 16:02:29,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 16:02:29,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:02:29,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 16:02:29,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 16:02:29,974 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 16:02:29,974 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 16:02:29,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 16:02:29,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 16:02:29,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 16:02:29,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 16:02:30,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 16:02:30,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 16:02:30,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 16:02:30,386 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 16:02:30,386 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 16:02:30,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label44.c [2020-10-27 16:02:30,479 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df5b6d8ed/c37d5350e60e4e16a5da570702d9d2f2/FLAGe6443b714 [2020-10-27 16:02:31,561 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 16:02:31,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label44.c [2020-10-27 16:02:31,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df5b6d8ed/c37d5350e60e4e16a5da570702d9d2f2/FLAGe6443b714 [2020-10-27 16:02:31,990 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df5b6d8ed/c37d5350e60e4e16a5da570702d9d2f2 [2020-10-27 16:02:31,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 16:02:32,000 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 16:02:32,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 16:02:32,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 16:02:32,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 16:02:32,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:02:31" (1/1) ... [2020-10-27 16:02:32,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a624960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:02:32, skipping insertion in model container [2020-10-27 16:02:32,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:02:31" (1/1) ... [2020-10-27 16:02:32,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 16:02:32,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 16:02:33,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:02:33,667 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 16:02:34,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:02:34,356 INFO L208 MainTranslator]: Completed translation [2020-10-27 16:02:34,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:02:34 WrapperNode [2020-10-27 16:02:34,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 16:02:34,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 16:02:34,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 16:02:34,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 16:02:34,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:02:34" (1/1) ... [2020-10-27 16:02:34,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:02:34" (1/1) ... [2020-10-27 16:02:34,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:02:34" (1/1) ... [2020-10-27 16:02:34,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:02:34" (1/1) ... [2020-10-27 16:02:34,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:02:34" (1/1) ... [2020-10-27 16:02:34,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:02:34" (1/1) ... [2020-10-27 16:02:34,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:02:34" (1/1) ... [2020-10-27 16:02:34,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 16:02:34,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 16:02:34,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 16:02:34,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 16:02:34,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:02:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:02:34,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 16:02:34,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 16:02:34,816 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 16:02:34,816 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 16:02:34,817 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 16:02:34,817 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 16:02:34,817 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 16:02:34,818 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 16:02:34,818 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 16:02:34,818 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 16:02:34,819 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 16:02:34,819 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 16:02:34,820 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 16:02:34,820 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 16:02:34,820 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 16:02:34,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 16:02:34,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 16:02:34,821 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 16:02:34,821 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 16:02:34,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 16:02:34,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 16:02:34,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 16:02:34,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 16:02:34,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 16:02:34,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 16:02:40,112 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 16:02:40,112 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 16:02:40,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:02:40 BoogieIcfgContainer [2020-10-27 16:02:40,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 16:02:40,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 16:02:40,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 16:02:40,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 16:02:40,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:02:31" (1/3) ... [2020-10-27 16:02:40,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591cf3a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:02:40, skipping insertion in model container [2020-10-27 16:02:40,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:02:34" (2/3) ... [2020-10-27 16:02:40,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591cf3a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:02:40, skipping insertion in model container [2020-10-27 16:02:40,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:02:40" (3/3) ... [2020-10-27 16:02:40,125 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label44.c [2020-10-27 16:02:40,137 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 16:02:40,143 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 16:02:40,157 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 16:02:40,192 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 16:02:40,192 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 16:02:40,192 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 16:02:40,193 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 16:02:40,193 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 16:02:40,193 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 16:02:40,193 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 16:02:40,193 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 16:02:40,230 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-27 16:02:40,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2020-10-27 16:02:40,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:02:40,275 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] [2020-10-27 16:02:40,275 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:02:40,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:02:40,282 INFO L82 PathProgramCache]: Analyzing trace with hash -882410056, now seen corresponding path program 1 times [2020-10-27 16:02:40,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:02:40,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755432029] [2020-10-27 16:02:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:02:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:02:41,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:02:45,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:02:45,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:02:45,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 811 [2020-10-27 16:02:45,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:02:45,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-27 16:02:45,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:02:45,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:02:45,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:02:45,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 802 [2020-10-27 16:02:45,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 16:02:46,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:02:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:02:46,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:02:46,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:02:46,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:02:46,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:02:46,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 16:02:46,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:02:46,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:02:46,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:02:46,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:02:46,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:02:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:02:48,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755432029] [2020-10-27 16:02:48,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:02:48,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 16:02:48,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837049392] [2020-10-27 16:02:48,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 16:02:48,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:02:48,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 16:02:48,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 16:02:48,474 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 4 states. [2020-10-27 16:03:00,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:03:00,309 INFO L93 Difference]: Finished difference Result 2677 states and 5144 transitions. [2020-10-27 16:03:00,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:03:00,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 795 [2020-10-27 16:03:00,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:03:00,366 INFO L225 Difference]: With dead ends: 2677 [2020-10-27 16:03:00,366 INFO L226 Difference]: Without dead ends: 1703 [2020-10-27 16:03:00,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:03:00,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2020-10-27 16:03:00,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1688. [2020-10-27 16:03:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1688 states. [2020-10-27 16:03:00,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2974 transitions. [2020-10-27 16:03:00,606 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2974 transitions. Word has length 795 [2020-10-27 16:03:00,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:03:00,610 INFO L481 AbstractCegarLoop]: Abstraction has 1688 states and 2974 transitions. [2020-10-27 16:03:00,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 16:03:00,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2974 transitions. [2020-10-27 16:03:00,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 805 [2020-10-27 16:03:00,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:03:00,645 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 16:03:00,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 16:03:00,645 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:03:00,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:03:00,647 INFO L82 PathProgramCache]: Analyzing trace with hash -670062093, now seen corresponding path program 1 times [2020-10-27 16:03:00,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:03:00,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850909213] [2020-10-27 16:03:00,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:03:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:03:00,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:03:01,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:03:05,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:03:05,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 822 [2020-10-27 16:03:05,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:03:05,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-27 16:03:05,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:03:05,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 16:03:05,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 16:03:05,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 718 [2020-10-27 16:03:05,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:03:08,106 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-27 16:03:08,337 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-27 16:03:08,496 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-10-27 16:03:08,643 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-10-27 16:03:08,989 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2020-10-27 16:03:09,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:03:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:03:09,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:03:09,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:03:09,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:03:09,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:03:09,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 16:03:09,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:03:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:03:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:03:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:03:09,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:03:09,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:03:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:03:09,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:03:09,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:03:09,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 16:03:09,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:03:09,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 16:03:09,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:03:09,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:03:09,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:03:09,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 16:03:09,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:03:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:03:15,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850909213] [2020-10-27 16:03:15,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:03:15,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 16:03:15,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721766958] [2020-10-27 16:03:15,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 16:03:15,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:03:15,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 16:03:15,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-27 16:03:15,153 INFO L87 Difference]: Start difference. First operand 1688 states and 2974 transitions. Second operand 19 states. [2020-10-27 16:03:15,732 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 16:03:15,969 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 16:03:21,556 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 126 [2020-10-27 16:03:25,042 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 125 [2020-10-27 16:03:25,580 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 141 [2020-10-27 16:03:27,002 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 137 [2020-10-27 16:03:30,871 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 134 [2020-10-27 16:03:35,838 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 117 [2020-10-27 16:03:36,289 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 126 [2020-10-27 16:03:38,269 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 123 [2020-10-27 16:03:42,606 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 119 [2020-10-27 16:03:46,120 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 109 [2020-10-27 16:03:46,525 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2020-10-27 16:03:50,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:03:50,189 INFO L93 Difference]: Finished difference Result 4096 states and 7392 transitions. [2020-10-27 16:03:50,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 16:03:50,191 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 804 [2020-10-27 16:03:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:03:50,207 INFO L225 Difference]: With dead ends: 4096 [2020-10-27 16:03:50,207 INFO L226 Difference]: Without dead ends: 2414 [2020-10-27 16:03:50,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 16:03:50,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2020-10-27 16:03:50,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 2410. [2020-10-27 16:03:50,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2410 states. [2020-10-27 16:03:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 3713 transitions. [2020-10-27 16:03:50,304 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 3713 transitions. Word has length 804 [2020-10-27 16:03:50,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:03:50,306 INFO L481 AbstractCegarLoop]: Abstraction has 2410 states and 3713 transitions. [2020-10-27 16:03:50,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 16:03:50,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 3713 transitions. [2020-10-27 16:03:50,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 816 [2020-10-27 16:03:50,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:03:50,340 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 16:03:50,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 16:03:50,341 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:03:50,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:03:50,342 INFO L82 PathProgramCache]: Analyzing trace with hash 56048238, now seen corresponding path program 1 times [2020-10-27 16:03:50,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:03:50,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922620768] [2020-10-27 16:03:50,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:03:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:03:50,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:03:51,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:03:53,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:03:55,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:03:55,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 833 [2020-10-27 16:03:55,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:03:55,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 16:03:55,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:03:55,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 16:03:55,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 16:03:55,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 799 [2020-10-27 16:03:55,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:03:56,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:03:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:03:56,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:03:56,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:03:56,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:03:56,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:03:56,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 16:03:56,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:03:56,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:03:56,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:03:56,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:03:56,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:03:56,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:03:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:03:56,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:03:56,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:03:56,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 16:03:56,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:03:56,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 16:03:56,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:03:56,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:03:56,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:03:56,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 16:03:56,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:03:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:03:56,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922620768] [2020-10-27 16:03:56,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:03:56,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 16:03:56,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254101244] [2020-10-27 16:03:56,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 16:03:56,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:03:56,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 16:03:56,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:03:56,826 INFO L87 Difference]: Start difference. First operand 2410 states and 3713 transitions. Second operand 6 states. [2020-10-27 16:03:56,976 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 16:03:57,309 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 16:04:15,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:04:15,531 INFO L93 Difference]: Finished difference Result 8202 states and 13579 transitions. [2020-10-27 16:04:15,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 16:04:15,533 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 815 [2020-10-27 16:04:15,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:04:15,569 INFO L225 Difference]: With dead ends: 8202 [2020-10-27 16:04:15,569 INFO L226 Difference]: Without dead ends: 5798 [2020-10-27 16:04:15,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 16:04:15,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2020-10-27 16:04:15,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5790. [2020-10-27 16:04:15,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5790 states. [2020-10-27 16:04:15,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5790 states to 5790 states and 8598 transitions. [2020-10-27 16:04:15,746 INFO L78 Accepts]: Start accepts. Automaton has 5790 states and 8598 transitions. Word has length 815 [2020-10-27 16:04:15,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:04:15,748 INFO L481 AbstractCegarLoop]: Abstraction has 5790 states and 8598 transitions. [2020-10-27 16:04:15,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 16:04:15,748 INFO L276 IsEmpty]: Start isEmpty. Operand 5790 states and 8598 transitions. [2020-10-27 16:04:15,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 824 [2020-10-27 16:04:15,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:04:15,769 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:04:15,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 16:04:15,770 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:04:15,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:04:15,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1893832450, now seen corresponding path program 1 times [2020-10-27 16:04:15,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:04:15,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796822382] [2020-10-27 16:04:15,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:04:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:04:15,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:04:17,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:04:19,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:04:20,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:04:20,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 841 [2020-10-27 16:04:20,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:04:20,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-27 16:04:20,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:04:20,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 16:04:20,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-27 16:04:20,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 770 [2020-10-27 16:04:20,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:04:23,395 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-10-27 16:04:23,544 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-10-27 16:04:23,675 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-10-27 16:04:23,826 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-27 16:04:23,980 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-27 16:04:24,123 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-27 16:04:24,386 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-10-27 16:04:24,621 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:04:24,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:04:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:04:24,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:04:24,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:04:24,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:04:24,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:04:24,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 16:04:24,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:04:24,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:04:24,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:04:24,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:04:24,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:04:24,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:04:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:04:24,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:04:24,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:04:24,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 16:04:24,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:04:24,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 16:04:24,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:04:24,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:04:24,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:04:24,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 16:04:24,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:04:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:04:32,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796822382] [2020-10-27 16:04:32,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:04:32,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 16:04:32,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877746600] [2020-10-27 16:04:32,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 16:04:32,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:04:32,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 16:04:32,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-27 16:04:32,041 INFO L87 Difference]: Start difference. First operand 5790 states and 8598 transitions. Second operand 19 states. [2020-10-27 16:04:32,659 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 16:04:32,967 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 16:04:39,823 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 16:04:40,101 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 16:04:45,701 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 16:04:46,410 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 16:04:47,284 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 16:04:47,556 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 16:04:48,916 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 16:04:50,146 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 16:04:55,038 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-27 16:04:55,286 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 16:04:57,927 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 120 [2020-10-27 16:04:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:04:58,435 INFO L93 Difference]: Finished difference Result 12343 states and 18777 transitions. [2020-10-27 16:04:58,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 16:04:58,438 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 823 [2020-10-27 16:04:58,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:04:58,471 INFO L225 Difference]: With dead ends: 12343 [2020-10-27 16:04:58,471 INFO L226 Difference]: Without dead ends: 6559 [2020-10-27 16:04:58,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2020-10-27 16:04:58,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6559 states. [2020-10-27 16:04:58,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6559 to 6551. [2020-10-27 16:04:58,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6551 states. [2020-10-27 16:04:58,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6551 states to 6551 states and 9375 transitions. [2020-10-27 16:04:58,671 INFO L78 Accepts]: Start accepts. Automaton has 6551 states and 9375 transitions. Word has length 823 [2020-10-27 16:04:58,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:04:58,674 INFO L481 AbstractCegarLoop]: Abstraction has 6551 states and 9375 transitions. [2020-10-27 16:04:58,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 16:04:58,675 INFO L276 IsEmpty]: Start isEmpty. Operand 6551 states and 9375 transitions. [2020-10-27 16:04:58,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 876 [2020-10-27 16:04:58,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:04:58,703 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:04:58,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 16:04:58,704 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:04:58,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:04:58,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1198848090, now seen corresponding path program 1 times [2020-10-27 16:04:58,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:04:58,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776777940] [2020-10-27 16:04:58,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:04:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:04:58,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:04:59,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:05:03,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:05:03,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 893 [2020-10-27 16:05:03,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:05:03,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-27 16:05:03,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:05:03,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 16:05:03,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-27 16:05:03,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 670 [2020-10-27 16:05:03,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:05:05,381 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-27 16:05:05,536 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-27 16:05:05,668 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-27 16:05:05,907 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-27 16:05:06,060 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2020-10-27 16:05:06,198 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-27 16:05:06,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:05:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:05:06,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:05:06,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:05:06,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:05:06,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:05:06,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 16:05:06,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:05:06,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:05:06,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:05:06,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:05:06,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:05:06,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:05:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:05:06,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:05:06,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:05:06,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 16:05:06,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:05:06,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-27 16:05:06,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:05:06,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:05:06,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:05:06,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 16:05:06,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:05:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:05:13,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776777940] [2020-10-27 16:05:13,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:05:13,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 16:05:13,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443478942] [2020-10-27 16:05:13,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 16:05:13,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:05:13,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 16:05:13,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-27 16:05:13,197 INFO L87 Difference]: Start difference. First operand 6551 states and 9375 transitions. Second operand 17 states. [2020-10-27 16:05:14,903 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 16:05:15,184 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 16:05:22,684 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 16:05:22,978 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 16:05:28,004 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 16:05:29,289 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 16:05:31,537 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 16:05:31,828 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 16:05:32,557 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 134 [2020-10-27 16:05:37,853 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 131 [2020-10-27 16:05:38,614 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 126 [2020-10-27 16:05:41,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:05:41,829 INFO L93 Difference]: Finished difference Result 13767 states and 20129 transitions. [2020-10-27 16:05:41,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 16:05:41,830 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 875 [2020-10-27 16:05:41,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:05:41,863 INFO L225 Difference]: With dead ends: 13767 [2020-10-27 16:05:41,863 INFO L226 Difference]: Without dead ends: 7222 [2020-10-27 16:05:41,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2020-10-27 16:05:41,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7222 states. [2020-10-27 16:05:42,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7222 to 7214. [2020-10-27 16:05:42,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7214 states. [2020-10-27 16:05:42,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7214 states to 7214 states and 10052 transitions. [2020-10-27 16:05:42,069 INFO L78 Accepts]: Start accepts. Automaton has 7214 states and 10052 transitions. Word has length 875 [2020-10-27 16:05:42,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:05:42,070 INFO L481 AbstractCegarLoop]: Abstraction has 7214 states and 10052 transitions. [2020-10-27 16:05:42,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 16:05:42,070 INFO L276 IsEmpty]: Start isEmpty. Operand 7214 states and 10052 transitions. [2020-10-27 16:05:42,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2020-10-27 16:05:42,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:05:42,098 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:05:42,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 16:05:42,099 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:05:42,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:05:42,100 INFO L82 PathProgramCache]: Analyzing trace with hash -526580427, now seen corresponding path program 1 times [2020-10-27 16:05:42,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:05:42,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009013833] [2020-10-27 16:05:42,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:05:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:05:42,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:05:42,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:05:45,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:05:47,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:05:47,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 898 [2020-10-27 16:05:47,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:05:47,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 16:05:47,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:05:47,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 16:05:47,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-27 16:05:47,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 799 [2020-10-27 16:05:47,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:05:47,777 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:05:47,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:05:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:05:47,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:05:47,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:05:47,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:05:47,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:05:47,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 16:05:47,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:05:47,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:05:47,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:05:47,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:05:47,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:05:47,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:05:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:05:47,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:05:47,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:05:47,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 16:05:47,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:05:47,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 16:05:47,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:05:47,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:05:47,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:05:47,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:05:47,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:05:47,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 16:05:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:05:47,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:05:47,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:05:47,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 16:05:47,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:05:47,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-27 16:05:47,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:05:47,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:05:47,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:05:47,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 16:05:47,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:05:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 16:05:48,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009013833] [2020-10-27 16:05:48,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:05:48,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:05:48,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038303789] [2020-10-27 16:05:48,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:05:48,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:05:48,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:05:48,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:05:48,593 INFO L87 Difference]: Start difference. First operand 7214 states and 10052 transitions. Second operand 5 states. [2020-10-27 16:05:48,799 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 16:06:02,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:06:02,845 INFO L93 Difference]: Finished difference Result 19494 states and 28353 transitions. [2020-10-27 16:06:02,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:06:02,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 878 [2020-10-27 16:06:02,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:06:02,907 INFO L225 Difference]: With dead ends: 19494 [2020-10-27 16:06:02,908 INFO L226 Difference]: Without dead ends: 12286 [2020-10-27 16:06:02,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:06:02,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12286 states. [2020-10-27 16:06:03,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12286 to 12278. [2020-10-27 16:06:03,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12278 states. [2020-10-27 16:06:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12278 states to 12278 states and 16524 transitions. [2020-10-27 16:06:03,262 INFO L78 Accepts]: Start accepts. Automaton has 12278 states and 16524 transitions. Word has length 878 [2020-10-27 16:06:03,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:06:03,263 INFO L481 AbstractCegarLoop]: Abstraction has 12278 states and 16524 transitions. [2020-10-27 16:06:03,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:06:03,263 INFO L276 IsEmpty]: Start isEmpty. Operand 12278 states and 16524 transitions. [2020-10-27 16:06:03,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 891 [2020-10-27 16:06:03,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:06:03,303 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:06:03,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 16:06:03,303 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:06:03,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:06:03,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1170769549, now seen corresponding path program 1 times [2020-10-27 16:06:03,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:06:03,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701522007] [2020-10-27 16:06:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:06:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:06:03,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:03,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:03,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:08,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:06:08,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 910 [2020-10-27 16:06:08,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:06:08,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-27 16:06:08,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:06:08,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 16:06:08,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-27 16:06:08,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 593 [2020-10-27 16:06:08,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:06:09,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:06:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:06:09,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:09,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:06:09,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:06:09,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:06:09,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 16:06:09,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:06:09,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:06:09,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:06:09,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:06:09,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:06:09,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:06:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:06:09,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:09,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:06:09,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 16:06:09,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:06:09,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 16:06:09,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:06:09,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:06:09,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:06:09,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:06:09,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:06:09,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 16:06:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:06:09,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:09,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:06:09,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 16:06:09,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:06:09,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 16:06:09,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:06:09,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:06:09,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:06:09,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 16:06:09,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0