/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:09:50,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:09:50,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:09:50,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:09:50,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:09:50,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:09:50,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:09:50,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:09:50,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:09:51,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:09:51,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:09:51,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:09:51,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:09:51,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:09:51,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:09:51,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:09:51,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:09:51,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:09:51,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:09:51,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:09:51,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:09:51,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:09:51,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:09:51,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:09:51,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:09:51,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:09:51,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:09:51,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:09:51,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:09:51,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:09:51,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:09:51,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:09:51,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:09:51,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:09:51,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:09:51,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:09:51,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:09:51,041 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:09:51,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:09:51,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:09:51,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:09:51,048 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 23:09:51,096 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:09:51,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:09:51,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:09:51,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:09:51,103 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:09:51,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:09:51,103 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:09:51,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:09:51,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:09:51,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:09:51,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:09:51,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:09:51,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:09:51,106 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:09:51,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:09:51,106 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:09:51,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:09:51,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:09:51,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:09:51,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:09:51,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:09:51,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:09:51,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:09:51,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:09:51,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:09:51,109 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:09:51,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:09:51,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:09:51,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:09:51,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:09:51,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:09:51,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:09:51,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:09:51,572 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:09:51,573 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:09:51,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label27.c [2020-10-26 23:09:51,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cbdb4d0f6/ea46f12e547840deb3b2a1d11dae2ff7/FLAGb0922115f [2020-10-26 23:09:52,970 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:09:52,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label27.c [2020-10-26 23:09:53,028 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cbdb4d0f6/ea46f12e547840deb3b2a1d11dae2ff7/FLAGb0922115f [2020-10-26 23:09:53,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cbdb4d0f6/ea46f12e547840deb3b2a1d11dae2ff7 [2020-10-26 23:09:53,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:09:53,321 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:09:53,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:09:53,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:09:53,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:09:53,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:09:53" (1/1) ... [2020-10-26 23:09:53,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d8407dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:09:53, skipping insertion in model container [2020-10-26 23:09:53,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:09:53" (1/1) ... [2020-10-26 23:09:53,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:09:53,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:09:55,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:09:55,512 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:09:56,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:09:56,413 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:09:56,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:09:56 WrapperNode [2020-10-26 23:09:56,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:09:56,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:09:56,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:09:56,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:09:56,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:09:56" (1/1) ... [2020-10-26 23:09:56,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:09:56" (1/1) ... [2020-10-26 23:09:56,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:09:56" (1/1) ... [2020-10-26 23:09:56,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:09:56" (1/1) ... [2020-10-26 23:09:56,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:09:56" (1/1) ... [2020-10-26 23:09:56,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:09:56" (1/1) ... [2020-10-26 23:09:57,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:09:56" (1/1) ... [2020-10-26 23:09:57,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:09:57,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:09:57,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:09:57,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:09:57,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:09:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:09:57,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:09:57,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:09:57,223 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:09:57,223 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:09:57,224 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:09:57,224 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:09:57,224 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:09:57,224 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:09:57,225 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:09:57,225 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:09:57,226 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:09:57,226 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:09:57,227 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:09:57,227 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:09:57,227 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:09:57,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:09:57,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:09:57,229 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:09:57,229 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:09:57,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:09:57,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:09:57,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:09:57,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:09:57,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:09:57,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:10:07,522 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:10:07,523 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:10:07,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:10:07 BoogieIcfgContainer [2020-10-26 23:10:07,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:10:07,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:10:07,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:10:07,542 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:10:07,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:09:53" (1/3) ... [2020-10-26 23:10:07,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104dff70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:10:07, skipping insertion in model container [2020-10-26 23:10:07,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:09:56" (2/3) ... [2020-10-26 23:10:07,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104dff70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:10:07, skipping insertion in model container [2020-10-26 23:10:07,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:10:07" (3/3) ... [2020-10-26 23:10:07,549 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label27.c [2020-10-26 23:10:07,561 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:10:07,567 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:10:07,583 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:10:07,623 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:10:07,623 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:10:07,623 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:10:07,624 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:10:07,624 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:10:07,624 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:10:07,624 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:10:07,624 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:10:07,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:10:07,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 23:10:07,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:10:07,679 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] [2020-10-26 23:10:07,680 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:10:07,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:10:07,687 INFO L82 PathProgramCache]: Analyzing trace with hash 416159474, now seen corresponding path program 1 times [2020-10-26 23:10:07,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:10:07,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101522765] [2020-10-26 23:10:07,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:10:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:08,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:08,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:08,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 23:10:08,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:08,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 630 [2020-10-26 23:10:08,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:08,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:10:08,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:10:08,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-26 23:10:08,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:10:08,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:10:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:08,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:08,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:08,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:10:08,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:08,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 23:10:08,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:08,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:10:08,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:10:08,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:10:08,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:10:08,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101522765] [2020-10-26 23:10:08,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:10:08,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:10:08,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484712250] [2020-10-26 23:10:08,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:10:08,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:10:08,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:10:08,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:10:08,915 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:10:29,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:10:29,455 INFO L93 Difference]: Finished difference Result 3247 states and 5953 transitions. [2020-10-26 23:10:29,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:10:29,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-26 23:10:29,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:10:29,502 INFO L225 Difference]: With dead ends: 3247 [2020-10-26 23:10:29,502 INFO L226 Difference]: Without dead ends: 2045 [2020-10-26 23:10:29,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:10:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2020-10-26 23:10:29,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1988. [2020-10-26 23:10:29,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1988 states. [2020-10-26 23:10:29,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3533 transitions. [2020-10-26 23:10:29,707 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3533 transitions. Word has length 52 [2020-10-26 23:10:29,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:10:29,708 INFO L481 AbstractCegarLoop]: Abstraction has 1988 states and 3533 transitions. [2020-10-26 23:10:29,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:10:29,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3533 transitions. [2020-10-26 23:10:29,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-26 23:10:29,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:10:29,716 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:10:29,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:10:29,717 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:10:29,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:10:29,718 INFO L82 PathProgramCache]: Analyzing trace with hash 695830070, now seen corresponding path program 1 times [2020-10-26 23:10:29,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:10:29,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258507731] [2020-10-26 23:10:29,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:10:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:29,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:29,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:30,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:31,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:31,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-26 23:10:31,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:10:31,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1951 [2020-10-26 23:10:31,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:31,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:10:31,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:10:31,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:10:31,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:10:31,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:10:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:31,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:31,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:31,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:10:31,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:31,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 23:10:31,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:31,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:10:31,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:10:31,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:10:31,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-26 23:10:31,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:10:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:32,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:32,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:32,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 23:10:32,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:32,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-26 23:10:32,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:32,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:10:32,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:10:32,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 23:10:32,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:10:32,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258507731] [2020-10-26 23:10:32,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:10:32,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 23:10:32,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357423168] [2020-10-26 23:10:32,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:10:32,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:10:32,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:10:32,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:10:32,342 INFO L87 Difference]: Start difference. First operand 1988 states and 3533 transitions. Second operand 8 states. [2020-10-26 23:11:02,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:11:02,841 INFO L93 Difference]: Finished difference Result 7491 states and 13635 transitions. [2020-10-26 23:11:02,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 23:11:02,844 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-10-26 23:11:02,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:11:02,886 INFO L225 Difference]: With dead ends: 7491 [2020-10-26 23:11:02,886 INFO L226 Difference]: Without dead ends: 5509 [2020-10-26 23:11:02,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-26 23:11:02,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5509 states. [2020-10-26 23:11:03,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5509 to 5444. [2020-10-26 23:11:03,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5444 states. [2020-10-26 23:11:03,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5444 states to 5444 states and 8635 transitions. [2020-10-26 23:11:03,128 INFO L78 Accepts]: Start accepts. Automaton has 5444 states and 8635 transitions. Word has length 121 [2020-10-26 23:11:03,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:11:03,131 INFO L481 AbstractCegarLoop]: Abstraction has 5444 states and 8635 transitions. [2020-10-26 23:11:03,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:11:03,131 INFO L276 IsEmpty]: Start isEmpty. Operand 5444 states and 8635 transitions. [2020-10-26 23:11:03,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-26 23:11:03,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:11:03,146 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:11:03,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:11:03,147 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:11:03,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:11:03,148 INFO L82 PathProgramCache]: Analyzing trace with hash -363155830, now seen corresponding path program 1 times [2020-10-26 23:11:03,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:11:03,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670709688] [2020-10-26 23:11:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:11:03,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:03,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:03,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:04,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:05,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:05,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-26 23:11:05,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:11:05,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2743 [2020-10-26 23:11:05,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:05,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:11:05,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:11:05,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:11:05,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:06,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:11:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:06,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:06,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:06,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:11:06,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:06,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 23:11:06,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:06,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:11:06,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:11:06,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:11:06,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:06,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:11:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:06,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:06,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:06,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:11:06,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:06,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-26 23:11:06,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:06,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:11:06,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:11:06,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:11:06,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:11:06,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670709688] [2020-10-26 23:11:06,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:11:06,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:11:06,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746056410] [2020-10-26 23:11:06,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:11:06,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:11:06,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:11:06,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:11:06,729 INFO L87 Difference]: Start difference. First operand 5444 states and 8635 transitions. Second operand 7 states. [2020-10-26 23:11:06,882 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:11:35,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:11:35,575 INFO L93 Difference]: Finished difference Result 16157 states and 26071 transitions. [2020-10-26 23:11:35,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:11:35,582 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 127 [2020-10-26 23:11:35,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:11:35,645 INFO L225 Difference]: With dead ends: 16157 [2020-10-26 23:11:35,645 INFO L226 Difference]: Without dead ends: 10719 [2020-10-26 23:11:35,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:11:35,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10719 states. [2020-10-26 23:11:36,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10719 to 10483. [2020-10-26 23:11:36,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10483 states. [2020-10-26 23:11:36,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10483 states to 10483 states and 14674 transitions. [2020-10-26 23:11:36,057 INFO L78 Accepts]: Start accepts. Automaton has 10483 states and 14674 transitions. Word has length 127 [2020-10-26 23:11:36,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:11:36,060 INFO L481 AbstractCegarLoop]: Abstraction has 10483 states and 14674 transitions. [2020-10-26 23:11:36,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:11:36,060 INFO L276 IsEmpty]: Start isEmpty. Operand 10483 states and 14674 transitions. [2020-10-26 23:11:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-26 23:11:36,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:11:36,074 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:11:36,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:11:36,074 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:11:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:11:36,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1089442770, now seen corresponding path program 1 times [2020-10-26 23:11:36,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:11:36,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595594415] [2020-10-26 23:11:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:11:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:36,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:36,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:37,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:37,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-26 23:11:37,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:11:37,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1237 [2020-10-26 23:11:37,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:37,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:11:37,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:11:37,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 23:11:37,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:37,544 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:11:37,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:11:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:37,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:37,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:37,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:11:37,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:37,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 23:11:37,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:37,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:11:37,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:11:37,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:11:37,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:37,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:11:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:37,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:37,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:37,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 23:11:37,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:37,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-26 23:11:37,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:37,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:11:37,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:11:37,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:11:37,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:11:38,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595594415] [2020-10-26 23:11:38,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:11:38,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:11:38,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650489269] [2020-10-26 23:11:38,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:11:38,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:11:38,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:11:38,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:11:38,051 INFO L87 Difference]: Start difference. First operand 10483 states and 14674 transitions. Second operand 7 states. [2020-10-26 23:12:10,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:12:10,918 INFO L93 Difference]: Finished difference Result 29141 states and 42893 transitions. [2020-10-26 23:12:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:12:10,920 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 157 [2020-10-26 23:12:10,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:12:11,023 INFO L225 Difference]: With dead ends: 29141 [2020-10-26 23:12:11,023 INFO L226 Difference]: Without dead ends: 18664 [2020-10-26 23:12:11,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:12:11,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18664 states. [2020-10-26 23:12:11,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18664 to 18313. [2020-10-26 23:12:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18313 states. [2020-10-26 23:12:11,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18313 states to 18313 states and 24417 transitions. [2020-10-26 23:12:11,649 INFO L78 Accepts]: Start accepts. Automaton has 18313 states and 24417 transitions. Word has length 157 [2020-10-26 23:12:11,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:12:11,652 INFO L481 AbstractCegarLoop]: Abstraction has 18313 states and 24417 transitions. [2020-10-26 23:12:11,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:12:11,652 INFO L276 IsEmpty]: Start isEmpty. Operand 18313 states and 24417 transitions. [2020-10-26 23:12:11,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-26 23:12:11,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:12:11,662 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:12:11,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:12:11,662 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:12:11,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:12:11,676 INFO L82 PathProgramCache]: Analyzing trace with hash -412643502, now seen corresponding path program 1 times [2020-10-26 23:12:11,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:12:11,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745218936] [2020-10-26 23:12:11,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:12:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:11,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:11,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:12,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:13,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:14,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:16,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:16,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-26 23:12:16,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:12:16,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4266 [2020-10-26 23:12:16,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:16,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:12:16,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:12:16,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-10-26 23:12:16,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:16,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:12:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:16,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:16,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:16,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:12:16,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:16,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:12:16,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:16,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:12:16,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:12:16,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:12:16,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:16,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:12:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:16,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:16,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:16,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:16,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:12:16,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:12:16,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-26 23:12:16,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:16,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:12:16,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:12:16,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:12:16,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:12:17,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:12:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:17,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:17,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:17,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 23:12:17,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:17,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-26 23:12:17,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:17,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:12:17,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:12:17,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 23:12:17,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-26 23:12:17,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745218936] [2020-10-26 23:12:17,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:12:17,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:12:17,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83135760] [2020-10-26 23:12:17,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:12:17,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:12:17,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:12:17,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:12:17,445 INFO L87 Difference]: Start difference. First operand 18313 states and 24417 transitions. Second operand 7 states. [2020-10-26 23:12:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:12:47,701 INFO L93 Difference]: Finished difference Result 49248 states and 70825 transitions. [2020-10-26 23:12:47,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:12:47,711 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 257 [2020-10-26 23:12:47,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:12:47,882 INFO L225 Difference]: With dead ends: 49248 [2020-10-26 23:12:47,882 INFO L226 Difference]: Without dead ends: 31744 [2020-10-26 23:12:47,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:12:48,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31744 states. [2020-10-26 23:12:49,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31744 to 30604. [2020-10-26 23:12:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30604 states. [2020-10-26 23:12:49,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30604 states to 30604 states and 40734 transitions. [2020-10-26 23:12:49,234 INFO L78 Accepts]: Start accepts. Automaton has 30604 states and 40734 transitions. Word has length 257 [2020-10-26 23:12:49,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:12:49,235 INFO L481 AbstractCegarLoop]: Abstraction has 30604 states and 40734 transitions. [2020-10-26 23:12:49,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:12:49,235 INFO L276 IsEmpty]: Start isEmpty. Operand 30604 states and 40734 transitions. [2020-10-26 23:12:49,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-26 23:12:49,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:12:49,244 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:12:49,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:12:49,245 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:12:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:12:49,246 INFO L82 PathProgramCache]: Analyzing trace with hash 750148367, now seen corresponding path program 1 times [2020-10-26 23:12:49,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:12:49,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174809675] [2020-10-26 23:12:49,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:12:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:49,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:49,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:49,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:53,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:53,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 285 [2020-10-26 23:12:53,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:12:53,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3713 [2020-10-26 23:12:53,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:53,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:12:53,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-26 23:12:53,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 23:12:53,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:53,265 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:12:53,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:12:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:53,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:53,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:53,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:12:53,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:53,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 23:12:53,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:53,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:12:53,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:12:53,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:12:53,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:53,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:12:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:53,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:53,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:53,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:12:53,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:53,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-26 23:12:53,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:53,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:12:53,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:12:53,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 23:12:53,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:53,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:12:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:53,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:53,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:53,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 23:12:53,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:53,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-26 23:12:53,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:53,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:12:53,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:12:53,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 23:12:53,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:12:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 173 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:12:54,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174809675] [2020-10-26 23:12:54,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:12:54,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:12:54,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717469932] [2020-10-26 23:12:54,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:12:54,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:12:54,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:12:54,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:12:54,014 INFO L87 Difference]: Start difference. First operand 30604 states and 40734 transitions. Second operand 7 states. [2020-10-26 23:13:37,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:13:37,310 INFO L93 Difference]: Finished difference Result 73659 states and 116321 transitions. [2020-10-26 23:13:37,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:13:37,313 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 271 [2020-10-26 23:13:37,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:13:37,604 INFO L225 Difference]: With dead ends: 73659 [2020-10-26 23:13:37,604 INFO L226 Difference]: Without dead ends: 52092 [2020-10-26 23:13:37,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:13:37,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52092 states. [2020-10-26 23:13:39,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52092 to 43838. [2020-10-26 23:13:39,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43838 states. [2020-10-26 23:13:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43838 states to 43838 states and 57209 transitions. [2020-10-26 23:13:39,891 INFO L78 Accepts]: Start accepts. Automaton has 43838 states and 57209 transitions. Word has length 271 [2020-10-26 23:13:39,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:13:39,892 INFO L481 AbstractCegarLoop]: Abstraction has 43838 states and 57209 transitions. [2020-10-26 23:13:39,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:13:39,892 INFO L276 IsEmpty]: Start isEmpty. Operand 43838 states and 57209 transitions. [2020-10-26 23:13:39,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-26 23:13:39,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:13:39,899 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:13:39,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:13:39,900 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:13:39,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:13:39,900 INFO L82 PathProgramCache]: Analyzing trace with hash 2033787952, now seen corresponding path program 1 times [2020-10-26 23:13:39,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:13:39,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379244559] [2020-10-26 23:13:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:13:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:40,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:40,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:40,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:41,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking...