/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/Problem06_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 16:23:11,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 16:23:11,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 16:23:11,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 16:23:11,920 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 16:23:11,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 16:23:11,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 16:23:11,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 16:23:11,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 16:23:11,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 16:23:11,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 16:23:11,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 16:23:11,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 16:23:11,954 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 16:23:11,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 16:23:11,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 16:23:11,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 16:23:11,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 16:23:11,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 16:23:11,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 16:23:11,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 16:23:11,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 16:23:11,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 16:23:11,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 16:23:12,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 16:23:12,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 16:23:12,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 16:23:12,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 16:23:12,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 16:23:12,009 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 16:23:12,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 16:23:12,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 16:23:12,012 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 16:23:12,013 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 16:23:12,014 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 16:23:12,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 16:23:12,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 16:23:12,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 16:23:12,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 16:23:12,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 16:23:12,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 16:23:12,025 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 16:23:12,077 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 16:23:12,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 16:23:12,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 16:23:12,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 16:23:12,082 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 16:23:12,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 16:23:12,083 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 16:23:12,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 16:23:12,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 16:23:12,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 16:23:12,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 16:23:12,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 16:23:12,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 16:23:12,085 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 16:23:12,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 16:23:12,086 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 16:23:12,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 16:23:12,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 16:23:12,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 16:23:12,086 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 16:23:12,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 16:23:12,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:23:12,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 16:23:12,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 16:23:12,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 16:23:12,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 16:23:12,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 16:23:12,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 16:23:12,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 16:23:12,088 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 16:23:12,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 16:23:12,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 16:23:12,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 16:23:12,553 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 16:23:12,554 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 16:23:12,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label02.c [2020-10-27 16:23:12,629 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7455282a/34897bbcb7a04daf8800a8047223984e/FLAG2dac69a42 [2020-10-27 16:23:13,774 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 16:23:13,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label02.c [2020-10-27 16:23:13,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7455282a/34897bbcb7a04daf8800a8047223984e/FLAG2dac69a42 [2020-10-27 16:23:14,083 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7455282a/34897bbcb7a04daf8800a8047223984e [2020-10-27 16:23:14,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 16:23:14,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 16:23:14,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 16:23:14,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 16:23:14,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 16:23:14,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:23:14" (1/1) ... [2020-10-27 16:23:14,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@745ac16a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:23:14, skipping insertion in model container [2020-10-27 16:23:14,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:23:14" (1/1) ... [2020-10-27 16:23:14,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 16:23:14,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 16:23:16,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:23:16,587 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 16:23:17,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:23:17,812 INFO L208 MainTranslator]: Completed translation [2020-10-27 16:23:17,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:23:17 WrapperNode [2020-10-27 16:23:17,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 16:23:17,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 16:23:17,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 16:23:17,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 16:23:17,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:23:17" (1/1) ... [2020-10-27 16:23:17,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:23:17" (1/1) ... [2020-10-27 16:23:17,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:23:17" (1/1) ... [2020-10-27 16:23:17,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:23:17" (1/1) ... [2020-10-27 16:23:18,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:23:17" (1/1) ... [2020-10-27 16:23:18,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:23:17" (1/1) ... [2020-10-27 16:23:18,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:23:17" (1/1) ... [2020-10-27 16:23:18,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 16:23:18,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 16:23:18,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 16:23:18,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 16:23:18,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:23:17" (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 16:23:18,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 16:23:18,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 16:23:18,550 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 16:23:18,550 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 16:23:18,550 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 16:23:18,551 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 16:23:18,551 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 16:23:18,551 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 16:23:18,551 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 16:23:18,551 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 16:23:18,552 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 16:23:18,552 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 16:23:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 16:23:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 16:23:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 16:23:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 16:23:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 16:23:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 16:23:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 16:23:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 16:23:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 16:23:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 16:23:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 16:23:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 16:23:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 16:23:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 16:23:18,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 16:23:27,073 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 16:23:27,074 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 16:23:27,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:23:27 BoogieIcfgContainer [2020-10-27 16:23:27,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 16:23:27,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 16:23:27,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 16:23:27,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 16:23:27,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:23:14" (1/3) ... [2020-10-27 16:23:27,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe68654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:23:27, skipping insertion in model container [2020-10-27 16:23:27,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:23:17" (2/3) ... [2020-10-27 16:23:27,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe68654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:23:27, skipping insertion in model container [2020-10-27 16:23:27,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:23:27" (3/3) ... [2020-10-27 16:23:27,088 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label02.c [2020-10-27 16:23:27,102 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 16:23:27,108 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 16:23:27,123 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 16:23:27,159 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 16:23:27,159 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 16:23:27,159 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 16:23:27,159 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 16:23:27,160 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 16:23:27,160 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 16:23:27,160 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 16:23:27,160 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 16:23:27,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-27 16:23:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 953 [2020-10-27 16:23:27,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:23:27,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:23:27,272 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:23:27,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:23:27,280 INFO L82 PathProgramCache]: Analyzing trace with hash -2071787992, now seen corresponding path program 1 times [2020-10-27 16:23:27,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:23:27,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717156294] [2020-10-27 16:23:27,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:23:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:23:29,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:23:31,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:23:33,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:23:33,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 970 [2020-10-27 16:23:33,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:23:33,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-27 16:23:33,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:23:33,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 16:23:33,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:23:33,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 961 [2020-10-27 16:23:33,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 16:23:34,787 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:23:34,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:23:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:23:34,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:23:34,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:23:34,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:23:34,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:23:34,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 16:23:34,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:23:34,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:23:34,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:23:34,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:23:34,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:23:36,348 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 16:23:36,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717156294] [2020-10-27 16:23:36,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:23:36,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 16:23:36,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115257715] [2020-10-27 16:23:36,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 16:23:36,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:23:36,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 16:23:36,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 16:23:36,378 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 4 states. [2020-10-27 16:23:36,710 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:23:52,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:23:52,103 INFO L93 Difference]: Finished difference Result 3764 states and 7025 transitions. [2020-10-27 16:23:52,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:23:52,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 952 [2020-10-27 16:23:52,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:23:52,154 INFO L225 Difference]: With dead ends: 3764 [2020-10-27 16:23:52,155 INFO L226 Difference]: Without dead ends: 2381 [2020-10-27 16:23:52,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:23:52,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2020-10-27 16:23:52,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2338. [2020-10-27 16:23:52,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2338 states. [2020-10-27 16:23:52,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 3805 transitions. [2020-10-27 16:23:52,354 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 3805 transitions. Word has length 952 [2020-10-27 16:23:52,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:23:52,357 INFO L481 AbstractCegarLoop]: Abstraction has 2338 states and 3805 transitions. [2020-10-27 16:23:52,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 16:23:52,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 3805 transitions. [2020-10-27 16:23:52,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 961 [2020-10-27 16:23:52,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:23:52,397 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:23:52,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 16:23:52,399 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:23:52,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:23:52,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1392272983, now seen corresponding path program 1 times [2020-10-27 16:23:52,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:23:52,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066496589] [2020-10-27 16:23:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:23:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:23:52,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:23:54,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:23:57,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:23:57,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 980 [2020-10-27 16:23:57,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:23:57,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5232 [2020-10-27 16:23:57,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:23:57,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:23:57,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 16:23:57,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 958 [2020-10-27 16:23:57,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:23:58,645 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:23:58,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:23:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:23:58,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:23:58,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:23:58,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:23:58,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:23:58,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 16:23:58,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:23:58,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:23:58,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:23:58,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:23:58,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:23:58,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:23:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:23:58,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:23:58,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:23:58,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 16:23:58,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:23:58,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 16:23:58,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:23:58,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:23:58,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:23:58,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 16:23:58,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:23:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:23:59,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066496589] [2020-10-27 16:23:59,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:23:59,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:23:59,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379930524] [2020-10-27 16:23:59,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:23:59,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:23:59,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:23:59,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:23:59,756 INFO L87 Difference]: Start difference. First operand 2338 states and 3805 transitions. Second operand 5 states. [2020-10-27 16:24:00,028 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:24:17,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:24:17,366 INFO L93 Difference]: Finished difference Result 6898 states and 11355 transitions. [2020-10-27 16:24:17,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:24:17,367 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 960 [2020-10-27 16:24:17,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:24:17,398 INFO L225 Difference]: With dead ends: 6898 [2020-10-27 16:24:17,399 INFO L226 Difference]: Without dead ends: 4566 [2020-10-27 16:24:17,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:24:17,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4566 states. [2020-10-27 16:24:17,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4566 to 4505. [2020-10-27 16:24:17,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4505 states. [2020-10-27 16:24:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 6998 transitions. [2020-10-27 16:24:17,583 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 6998 transitions. Word has length 960 [2020-10-27 16:24:17,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:24:17,585 INFO L481 AbstractCegarLoop]: Abstraction has 4505 states and 6998 transitions. [2020-10-27 16:24:17,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:24:17,586 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 6998 transitions. [2020-10-27 16:24:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 968 [2020-10-27 16:24:17,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:24:17,634 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:24:17,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 16:24:17,635 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:24:17,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:24:17,636 INFO L82 PathProgramCache]: Analyzing trace with hash -2126265738, now seen corresponding path program 1 times [2020-10-27 16:24:17,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:24:17,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069348039] [2020-10-27 16:24:17,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:24:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:24:17,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:24:19,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:24:22,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:24:22,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 987 [2020-10-27 16:24:22,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:24:22,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 16:24:22,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:24:22,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 16:24:22,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:24:22,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 978 [2020-10-27 16:24:22,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:24:23,505 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:24:23,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:24:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:24:23,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:24:23,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:24:23,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:24:23,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:24:23,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 16:24:23,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:24:23,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:24:23,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:24:23,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:24:23,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:24:23,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:24:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:24:23,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:24:23,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:24:23,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:24:23,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 16:24:23,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:24:23,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-27 16:24:23,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:24:23,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:24:23,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:24:23,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 16:24:23,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:24:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 16:24:24,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069348039] [2020-10-27 16:24:24,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:24:24,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 16:24:24,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016538204] [2020-10-27 16:24:24,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 16:24:24,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:24:24,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 16:24:24,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:24:24,786 INFO L87 Difference]: Start difference. First operand 4505 states and 6998 transitions. Second operand 7 states. [2020-10-27 16:24:25,004 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:24:26,092 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:24:43,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:24:43,844 INFO L93 Difference]: Finished difference Result 13500 states and 21718 transitions. [2020-10-27 16:24:43,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 16:24:43,845 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 967 [2020-10-27 16:24:43,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:24:43,902 INFO L225 Difference]: With dead ends: 13500 [2020-10-27 16:24:43,902 INFO L226 Difference]: Without dead ends: 9001 [2020-10-27 16:24:43,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 16:24:43,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9001 states. [2020-10-27 16:24:44,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9001 to 8838. [2020-10-27 16:24:44,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8838 states. [2020-10-27 16:24:44,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8838 states to 8838 states and 12852 transitions. [2020-10-27 16:24:44,223 INFO L78 Accepts]: Start accepts. Automaton has 8838 states and 12852 transitions. Word has length 967 [2020-10-27 16:24:44,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:24:44,223 INFO L481 AbstractCegarLoop]: Abstraction has 8838 states and 12852 transitions. [2020-10-27 16:24:44,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 16:24:44,224 INFO L276 IsEmpty]: Start isEmpty. Operand 8838 states and 12852 transitions. [2020-10-27 16:24:44,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 980 [2020-10-27 16:24:44,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:24:44,258 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:24:44,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 16:24:44,259 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:24:44,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:24:44,260 INFO L82 PathProgramCache]: Analyzing trace with hash 739227230, now seen corresponding path program 1 times [2020-10-27 16:24:44,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:24:44,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147798979] [2020-10-27 16:24:44,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:24:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:24:44,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:24:46,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:24:49,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:24:49,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 999 [2020-10-27 16:24:49,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:24:49,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5182 [2020-10-27 16:24:49,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:24:49,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:24:49,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 16:24:49,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 958 [2020-10-27 16:24:49,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:24:50,349 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:24:50,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:24:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:24:50,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:24:50,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:24:50,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:24:50,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:24:50,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 16:24:50,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:24:50,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:24:50,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:24:50,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:24:50,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:24:50,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:24:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:24:50,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:24:50,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:24:50,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 16:24:50,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:24:50,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 16:24:50,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:24:50,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:24:50,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:24:50,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 16:24:50,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:24:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:24:51,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147798979] [2020-10-27 16:24:51,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:24:51,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:24:51,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679315550] [2020-10-27 16:24:51,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:24:51,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:24:51,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:24:51,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:24:51,549 INFO L87 Difference]: Start difference. First operand 8838 states and 12852 transitions. Second operand 5 states. [2020-10-27 16:24:51,978 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:25:10,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:25:10,493 INFO L93 Difference]: Finished difference Result 21969 states and 33161 transitions. [2020-10-27 16:25:10,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:25:10,503 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 979 [2020-10-27 16:25:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:25:10,577 INFO L225 Difference]: With dead ends: 21969 [2020-10-27 16:25:10,577 INFO L226 Difference]: Without dead ends: 13137 [2020-10-27 16:25:10,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:25:10,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13137 states. [2020-10-27 16:25:10,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13137 to 13038. [2020-10-27 16:25:10,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13038 states. [2020-10-27 16:25:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13038 states to 13038 states and 18684 transitions. [2020-10-27 16:25:10,996 INFO L78 Accepts]: Start accepts. Automaton has 13038 states and 18684 transitions. Word has length 979 [2020-10-27 16:25:10,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:25:10,998 INFO L481 AbstractCegarLoop]: Abstraction has 13038 states and 18684 transitions. [2020-10-27 16:25:10,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:25:10,999 INFO L276 IsEmpty]: Start isEmpty. Operand 13038 states and 18684 transitions. [2020-10-27 16:25:11,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 989 [2020-10-27 16:25:11,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:25:11,044 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:25:11,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 16:25:11,045 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:25:11,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:25:11,046 INFO L82 PathProgramCache]: Analyzing trace with hash -796411060, now seen corresponding path program 1 times [2020-10-27 16:25:11,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:25:11,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044813019] [2020-10-27 16:25:11,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:25:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:25:11,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:25:11,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:25:12,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:25:16,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:25:16,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1010 [2020-10-27 16:25:16,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:25:16,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5149 [2020-10-27 16:25:16,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:25:16,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:25:16,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 16:25:16,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 16:25:16,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:25:16,665 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:25:16,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:25:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:25:16,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:25:16,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:25:16,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:25:16,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:25:16,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 16:25:16,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:25:16,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:25:16,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:25:16,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:25:16,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:25:16,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:25:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:25:16,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:25:16,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:25:16,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 16:25:16,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:25:16,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 16:25:16,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:25:16,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:25:16,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:25:16,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 16:25:16,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:25:16,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-27 16:25:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:25:16,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:25:16,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:25:16,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 16:25:16,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:25:16,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 16:25:16,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:25:16,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:25:16,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:25:16,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 16:25:16,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:25:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 16:25:17,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044813019] [2020-10-27 16:25:17,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:25:17,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 16:25:17,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439255983] [2020-10-27 16:25:17,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 16:25:17,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:25:17,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 16:25:17,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:25:17,827 INFO L87 Difference]: Start difference. First operand 13038 states and 18684 transitions. Second operand 7 states. [2020-10-27 16:25:18,047 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:25:19,045 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 16:25:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:25:36,161 INFO L93 Difference]: Finished difference Result 39717 states and 60558 transitions. [2020-10-27 16:25:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 16:25:36,162 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 988 [2020-10-27 16:25:36,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:25:36,287 INFO L225 Difference]: With dead ends: 39717 [2020-10-27 16:25:36,287 INFO L226 Difference]: Without dead ends: 26685 [2020-10-27 16:25:36,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 16:25:36,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26685 states. [2020-10-27 16:25:37,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26685 to 26466. [2020-10-27 16:25:37,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26466 states. [2020-10-27 16:25:37,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26466 states to 26466 states and 38038 transitions. [2020-10-27 16:25:37,070 INFO L78 Accepts]: Start accepts. Automaton has 26466 states and 38038 transitions. Word has length 988 [2020-10-27 16:25:37,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:25:37,071 INFO L481 AbstractCegarLoop]: Abstraction has 26466 states and 38038 transitions. [2020-10-27 16:25:37,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 16:25:37,071 INFO L276 IsEmpty]: Start isEmpty. Operand 26466 states and 38038 transitions. [2020-10-27 16:25:37,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 999 [2020-10-27 16:25:37,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:25:37,167 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:25:37,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 16:25:37,168 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:25:37,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:25:37,169 INFO L82 PathProgramCache]: Analyzing trace with hash 976983599, now seen corresponding path program 1 times [2020-10-27 16:25:37,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:25:37,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544464835] [2020-10-27 16:25:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:25:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:25:37,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:25:37,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:25:37,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:25:42,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:25:42,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1022 [2020-10-27 16:25:42,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:25:42,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 16:25:42,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:25:42,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:25:42,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 16:25:42,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 16:25:42,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:25:42,707 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:25:42,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:25:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:25:42,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:25:42,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:25:42,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:25:42,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:25:42,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 16:25:42,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:25:42,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:25:42,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:25:42,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:25:42,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:25:42,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:25:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:25:42,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:25:42,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:25:42,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 16:25:42,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:25:42,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 16:25:42,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:25:42,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:25:42,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:25:42,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:25:42,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:25:42,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 16:25:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:25:42,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:25:42,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:25:42,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-27 16:25:42,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:25:42,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 16:25:42,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:25:42,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:25:42,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:25:42,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 16:25:42,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:25:42,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-27 16:25:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:25:42,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:25:42,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:25:42,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 16:25:42,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:25:42,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 16:25:42,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:25:42,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:25:42,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:25:42,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 16:25:42,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:25:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 16:25:43,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544464835] [2020-10-27 16:25:43,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:25:43,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 16:25:43,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249092677] [2020-10-27 16:25:43,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 16:25:43,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:25:43,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 16:25:43,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:25:43,506 INFO L87 Difference]: Start difference. First operand 26466 states and 38038 transitions. Second operand 7 states. [2020-10-27 16:25:43,717 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:25:45,005 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 16:26:02,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:26:02,933 INFO L93 Difference]: Finished difference Result 53795 states and 78493 transitions. [2020-10-27 16:26:02,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 16:26:02,934 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 998 [2020-10-27 16:26:02,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:26:03,038 INFO L225 Difference]: With dead ends: 53795 [2020-10-27 16:26:03,038 INFO L226 Difference]: Without dead ends: 27335 [2020-10-27 16:26:03,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-27 16:26:03,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27335 states. [2020-10-27 16:26:03,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27335 to 27197. [2020-10-27 16:26:03,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27197 states. [2020-10-27 16:26:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27197 states to 27197 states and 36904 transitions. [2020-10-27 16:26:03,963 INFO L78 Accepts]: Start accepts. Automaton has 27197 states and 36904 transitions. Word has length 998 [2020-10-27 16:26:03,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:26:03,964 INFO L481 AbstractCegarLoop]: Abstraction has 27197 states and 36904 transitions. [2020-10-27 16:26:03,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 16:26:03,964 INFO L276 IsEmpty]: Start isEmpty. Operand 27197 states and 36904 transitions. [2020-10-27 16:26:04,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1022 [2020-10-27 16:26:04,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:26:04,037 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:26:04,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 16:26:04,037 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:26:04,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:26:04,039 INFO L82 PathProgramCache]: Analyzing trace with hash 2141119888, now seen corresponding path program 1 times [2020-10-27 16:26:04,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:26:04,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281349922] [2020-10-27 16:26:04,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:26:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:26:04,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:26:04,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:26:04,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:26:04,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:26:09,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:26:09,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1047 [2020-10-27 16:26:09,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 16:26:09,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5126 [2020-10-27 16:26:09,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:26:09,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:26:09,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-27 16:26:09,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 16:26:09,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:26:09,681 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:26:09,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:26:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:26:09,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:26:09,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:26:09,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:26:09,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:26:09,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 16:26:09,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:26:09,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:26:09,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:26:09,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:26:09,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:26:09,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:26:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:26:09,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:26:09,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:26:09,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 16:26:09,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:26:09,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 16:26:09,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:26:09,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:26:09,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:26:09,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:26:09,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:26:09,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 16:26:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:26:09,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:26:09,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:26:09,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 16:26:09,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:26:09,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 16:26:09,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:26:09,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:26:09,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:26:09,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:26:09,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:26:09,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-27 16:26:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:26:09,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:26:09,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:26:09,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 16:26:09,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:26:09,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 16:26:09,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:26:09,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:26:09,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:26:09,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 16:26:09,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:26:09,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-27 16:26:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:26:09,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:26:09,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:26:09,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 16:26:09,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:26:09,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 16:26:09,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:26:09,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:26:09,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:26:09,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 16:26:09,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:26:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-27 16:26:10,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281349922] [2020-10-27 16:26:10,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:26:10,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 16:26:10,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569952718] [2020-10-27 16:26:10,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 16:26:10,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:26:10,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 16:26:10,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 16:26:10,496 INFO L87 Difference]: Start difference. First operand 27197 states and 36904 transitions. Second operand 8 states. [2020-10-27 16:26:11,014 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:26:11,390 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 16:26:12,018 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 158