/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:27:22,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:27:22,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:27:22,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:27:22,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:27:22,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:27:22,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:27:22,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:27:22,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:27:22,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:27:22,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:27:22,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:27:22,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:27:22,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:27:22,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:27:22,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:27:22,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:27:22,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:27:22,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:27:22,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:27:22,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:27:22,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:27:22,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:27:22,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:27:22,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:27:22,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:27:22,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:27:22,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:27:22,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:27:22,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:27:22,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:27:22,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:27:22,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:27:22,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:27:22,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:27:22,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:27:22,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:27:22,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:27:22,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:27:22,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:27:22,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:27:22,258 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 [2020-10-28 10:27:22,306 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:27:22,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:27:22,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:27:22,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:27:22,312 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:27:22,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:27:22,312 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:27:22,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:27:22,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:27:22,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:27:22,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:27:22,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:27:22,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:27:22,315 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:27:22,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:27:22,315 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:27:22,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:27:22,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:27:22,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:27:22,316 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:27:22,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:27:22,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:27:22,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:27:22,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:27:22,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:27:22,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:27:22,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:27:22,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:27:22,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:27:22,318 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:27:22,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:27:22,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:27:22,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:27:22,800 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:27:22,801 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:27:22,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label16.c [2020-10-28 10:27:22,874 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/038525c65/d1bc758688b24463aa0a785ef7a35750/FLAG7ce05cfb9 [2020-10-28 10:27:23,793 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:27:23,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label16.c [2020-10-28 10:27:23,830 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/038525c65/d1bc758688b24463aa0a785ef7a35750/FLAG7ce05cfb9 [2020-10-28 10:27:24,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/038525c65/d1bc758688b24463aa0a785ef7a35750 [2020-10-28 10:27:24,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:27:24,316 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:27:24,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:27:24,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:27:24,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:27:24,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:27:24" (1/1) ... [2020-10-28 10:27:24,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48f1d7cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:27:24, skipping insertion in model container [2020-10-28 10:27:24,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:27:24" (1/1) ... [2020-10-28 10:27:24,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:27:24,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:27:25,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:27:25,966 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:27:26,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:27:26,701 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:27:26,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:27:26 WrapperNode [2020-10-28 10:27:26,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:27:26,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:27:26,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:27:26,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:27:26,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:27:26" (1/1) ... [2020-10-28 10:27:26,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:27:26" (1/1) ... [2020-10-28 10:27:26,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:27:26" (1/1) ... [2020-10-28 10:27:26,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:27:26" (1/1) ... [2020-10-28 10:27:26,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:27:26" (1/1) ... [2020-10-28 10:27:26,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:27:26" (1/1) ... [2020-10-28 10:27:26,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:27:26" (1/1) ... [2020-10-28 10:27:27,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:27:27,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:27:27,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:27:27,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:27:27,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:27:26" (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 [2020-10-28 10:27:27,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:27:27,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:27:27,149 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:27:27,149 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:27:27,150 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 10:27:27,150 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 10:27:27,151 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 10:27:27,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:27:27,151 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:27:27,151 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 10:27:27,152 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 10:27:27,152 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 10:27:27,152 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:27:27,152 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:27:27,153 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:27:27,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:27:27,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:27:27,154 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:27:27,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:27:27,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:27:27,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:27:27,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:27:27,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:27:27,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:27:27,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:27:34,415 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:27:34,416 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:27:34,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:27:34 BoogieIcfgContainer [2020-10-28 10:27:34,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:27:34,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:27:34,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:27:34,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:27:34,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:27:24" (1/3) ... [2020-10-28 10:27:34,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62aa7a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:27:34, skipping insertion in model container [2020-10-28 10:27:34,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:27:26" (2/3) ... [2020-10-28 10:27:34,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62aa7a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:27:34, skipping insertion in model container [2020-10-28 10:27:34,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:27:34" (3/3) ... [2020-10-28 10:27:34,435 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label16.c [2020-10-28 10:27:34,447 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:27:34,453 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:27:34,467 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:27:34,504 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:27:34,504 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:27:34,504 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:27:34,504 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:27:34,505 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:27:34,505 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:27:34,505 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:27:34,505 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:27:34,549 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-28 10:27:34,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2020-10-28 10:27:34,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:27:34,606 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] [2020-10-28 10:27:34,607 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:27:34,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:27:34,614 INFO L82 PathProgramCache]: Analyzing trace with hash 18754564, now seen corresponding path program 1 times [2020-10-28 10:27:34,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:27:34,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771739675] [2020-10-28 10:27:34,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:27:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:27:35,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:27:39,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:27:40,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:27:40,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 828 [2020-10-28 10:27:40,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:27:40,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5170 [2020-10-28 10:27:40,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:27:40,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:27:40,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 10:27:40,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:27:40,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 819 [2020-10-28 10:27:40,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 10:27:41,660 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:27:41,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:27:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:27:41,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:27:41,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:27:41,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:27:41,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:27:41,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 10:27:41,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:27:41,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:27:41,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:27:41,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:27:41,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:27:41,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:27:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:27:42,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771739675] [2020-10-28 10:27:42,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:27:42,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 10:27:42,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641765811] [2020-10-28 10:27:42,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 10:27:42,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:27:42,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 10:27:42,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 10:27:42,620 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 4 states. [2020-10-28 10:27:42,876 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:27:58,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:27:58,774 INFO L93 Difference]: Finished difference Result 2677 states and 5143 transitions. [2020-10-28 10:27:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:27:58,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 812 [2020-10-28 10:27:58,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:27:58,831 INFO L225 Difference]: With dead ends: 2677 [2020-10-28 10:27:58,831 INFO L226 Difference]: Without dead ends: 1703 [2020-10-28 10:27:58,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:27:58,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2020-10-28 10:27:59,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1690. [2020-10-28 10:27:59,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-10-28 10:27:59,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2730 transitions. [2020-10-28 10:27:59,053 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2730 transitions. Word has length 812 [2020-10-28 10:27:59,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:27:59,056 INFO L481 AbstractCegarLoop]: Abstraction has 1690 states and 2730 transitions. [2020-10-28 10:27:59,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 10:27:59,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2730 transitions. [2020-10-28 10:27:59,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 821 [2020-10-28 10:27:59,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:27:59,090 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] [2020-10-28 10:27:59,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:27:59,090 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:27:59,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:27:59,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1304583398, now seen corresponding path program 1 times [2020-10-28 10:27:59,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:27:59,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648935385] [2020-10-28 10:27:59,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:27:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:27:59,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:28:00,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:28:02,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:28:04,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:28:04,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 838 [2020-10-28 10:28:04,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:28:04,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-28 10:28:04,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:28:04,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:28:04,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:28:04,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:28:04,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:28:04,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:28:04,632 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:28:04,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:28:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:28:04,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:28:04,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:28:04,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:28:04,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:28:04,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 10:28:04,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:28:04,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:28:04,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:28:04,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:28:04,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:28:04,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:28:04,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:28:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:28:04,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:28:04,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:28:04,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 10:28:04,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:28:04,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 10:28:04,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:28:04,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:28:04,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:28:04,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:28:04,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 10:28:04,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:28:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:28:05,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648935385] [2020-10-28 10:28:05,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:28:05,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:28:05,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815263553] [2020-10-28 10:28:05,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:28:05,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:28:05,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:28:05,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:28:05,254 INFO L87 Difference]: Start difference. First operand 1690 states and 2730 transitions. Second operand 7 states. [2020-10-28 10:28:05,531 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-28 10:28:16,758 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-28 10:28:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:28:27,684 INFO L93 Difference]: Finished difference Result 5185 states and 8427 transitions. [2020-10-28 10:28:27,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:28:27,686 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 820 [2020-10-28 10:28:27,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:28:27,707 INFO L225 Difference]: With dead ends: 5185 [2020-10-28 10:28:27,707 INFO L226 Difference]: Without dead ends: 3501 [2020-10-28 10:28:27,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:28:27,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3501 states. [2020-10-28 10:28:27,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3501 to 3448. [2020-10-28 10:28:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3448 states. [2020-10-28 10:28:27,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 5089 transitions. [2020-10-28 10:28:27,862 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 5089 transitions. Word has length 820 [2020-10-28 10:28:27,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:28:27,862 INFO L481 AbstractCegarLoop]: Abstraction has 3448 states and 5089 transitions. [2020-10-28 10:28:27,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:28:27,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 5089 transitions. [2020-10-28 10:28:27,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 823 [2020-10-28 10:28:27,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:28:27,885 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 10:28:27,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:28:27,885 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:28:27,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:28:27,888 INFO L82 PathProgramCache]: Analyzing trace with hash -792151614, now seen corresponding path program 1 times [2020-10-28 10:28:27,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:28:27,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383453901] [2020-10-28 10:28:27,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:28:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:28:27,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:28:29,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:28:31,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:28:33,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:28:33,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 840 [2020-10-28 10:28:33,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:28:33,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-28 10:28:33,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:28:33,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:28:33,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:28:33,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:28:33,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 10:28:33,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:28:33,379 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:28:33,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:28:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:28:33,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:28:33,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:28:33,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:28:33,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:28:33,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 10:28:33,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:28:33,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:28:33,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:28:33,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:28:33,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:28:33,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:28:33,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:28:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:28:33,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:28:33,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:28:33,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:28:33,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:28:33,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 10:28:33,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:28:33,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:28:33,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:28:33,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:28:33,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 10:28:33,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:28:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:28:34,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383453901] [2020-10-28 10:28:34,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:28:34,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:28:34,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803272810] [2020-10-28 10:28:34,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:28:34,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:28:34,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:28:34,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:28:34,209 INFO L87 Difference]: Start difference. First operand 3448 states and 5089 transitions. Second operand 7 states. [2020-10-28 10:28:34,469 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:28:38,853 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-28 10:28:55,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:28:55,709 INFO L93 Difference]: Finished difference Result 10409 states and 15576 transitions. [2020-10-28 10:28:55,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 10:28:55,714 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 822 [2020-10-28 10:28:55,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:28:55,756 INFO L225 Difference]: With dead ends: 10409 [2020-10-28 10:28:55,756 INFO L226 Difference]: Without dead ends: 6967 [2020-10-28 10:28:55,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:28:55,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6967 states. [2020-10-28 10:28:55,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6967 to 6940. [2020-10-28 10:28:55,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6940 states. [2020-10-28 10:28:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6940 states to 6940 states and 9410 transitions. [2020-10-28 10:28:56,023 INFO L78 Accepts]: Start accepts. Automaton has 6940 states and 9410 transitions. Word has length 822 [2020-10-28 10:28:56,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:28:56,026 INFO L481 AbstractCegarLoop]: Abstraction has 6940 states and 9410 transitions. [2020-10-28 10:28:56,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:28:56,026 INFO L276 IsEmpty]: Start isEmpty. Operand 6940 states and 9410 transitions. [2020-10-28 10:28:56,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 829 [2020-10-28 10:28:56,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:28:56,056 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 10:28:56,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:28:56,057 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:28:56,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:28:56,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1881923670, now seen corresponding path program 1 times [2020-10-28 10:28:56,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:28:56,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925571137] [2020-10-28 10:28:56,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:28:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:28:56,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:28:57,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:28:59,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:29:01,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:29:01,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 846 [2020-10-28 10:29:01,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:29:01,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 10:29:01,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:29:01,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:29:01,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:29:01,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:29:01,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 10:29:01,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:29:01,497 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:29:01,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:29:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:29:01,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:29:01,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:29:01,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:29:01,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:29:01,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 10:29:01,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:29:01,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:29:01,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:29:01,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:29:01,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:29:01,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:29:01,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:29:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:29:01,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:29:01,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:29:01,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 10:29:01,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:29:01,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 10:29:01,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:29:01,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:29:01,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:29:01,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:29:01,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 10:29:01,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:29:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:29:02,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925571137] [2020-10-28 10:29:02,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:29:02,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:29:02,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108402021] [2020-10-28 10:29:02,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:29:02,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:29:02,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:29:02,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:29:02,119 INFO L87 Difference]: Start difference. First operand 6940 states and 9410 transitions. Second operand 7 states. [2020-10-28 10:29:02,385 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:29:13,782 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:29:23,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:29:23,973 INFO L93 Difference]: Finished difference Result 21089 states and 29861 transitions. [2020-10-28 10:29:23,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:29:23,974 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 828 [2020-10-28 10:29:23,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:29:24,045 INFO L225 Difference]: With dead ends: 21089 [2020-10-28 10:29:24,046 INFO L226 Difference]: Without dead ends: 14155 [2020-10-28 10:29:24,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:29:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14155 states. [2020-10-28 10:29:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14155 to 14017. [2020-10-28 10:29:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14017 states. [2020-10-28 10:29:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14017 states to 14017 states and 18900 transitions. [2020-10-28 10:29:24,492 INFO L78 Accepts]: Start accepts. Automaton has 14017 states and 18900 transitions. Word has length 828 [2020-10-28 10:29:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:29:24,493 INFO L481 AbstractCegarLoop]: Abstraction has 14017 states and 18900 transitions. [2020-10-28 10:29:24,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:29:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 14017 states and 18900 transitions. [2020-10-28 10:29:24,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 861 [2020-10-28 10:29:24,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:29:24,546 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:29:24,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:29:24,547 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:29:24,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:29:24,547 INFO L82 PathProgramCache]: Analyzing trace with hash 677965334, now seen corresponding path program 1 times [2020-10-28 10:29:24,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:29:24,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399560350] [2020-10-28 10:29:24,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:29:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:29:24,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:29:24,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:29:29,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:29:29,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 878 [2020-10-28 10:29:29,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:29:29,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 10:29:29,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:29:29,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:29:29,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:29:29,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:29:29,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 10:29:29,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:29:29,955 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:29:29,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:29:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:29:29,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:29:29,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:29:29,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:29:29,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:29:29,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 10:29:29,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:29:29,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:29:29,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:29:29,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:29:29,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:29:29,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:29:30,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:29:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:29:30,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:29:30,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:29:30,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 10:29:30,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:29:30,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-28 10:29:30,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:29:30,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:29:30,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:29:30,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:29:30,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 10:29:30,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:29:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:29:30,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399560350] [2020-10-28 10:29:30,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:29:30,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:29:30,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477504757] [2020-10-28 10:29:30,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:29:30,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:29:30,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:29:30,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:29:30,497 INFO L87 Difference]: Start difference. First operand 14017 states and 18900 transitions. Second operand 7 states. [2020-10-28 10:29:30,740 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:29:43,862 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:29:50,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:29:50,955 INFO L93 Difference]: Finished difference Result 42101 states and 59122 transitions. [2020-10-28 10:29:50,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:29:50,957 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 860 [2020-10-28 10:29:50,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:29:51,073 INFO L225 Difference]: With dead ends: 42101 [2020-10-28 10:29:51,073 INFO L226 Difference]: Without dead ends: 28090 [2020-10-28 10:29:51,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:29:51,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28090 states. [2020-10-28 10:29:51,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28090 to 27872. [2020-10-28 10:29:51,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27872 states. [2020-10-28 10:29:51,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27872 states to 27872 states and 35767 transitions. [2020-10-28 10:29:51,791 INFO L78 Accepts]: Start accepts. Automaton has 27872 states and 35767 transitions. Word has length 860 [2020-10-28 10:29:51,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:29:51,792 INFO L481 AbstractCegarLoop]: Abstraction has 27872 states and 35767 transitions. [2020-10-28 10:29:51,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:29:51,792 INFO L276 IsEmpty]: Start isEmpty. Operand 27872 states and 35767 transitions. [2020-10-28 10:29:52,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 953 [2020-10-28 10:29:52,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:29:52,099 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:29:52,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 10:29:52,099 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:29:52,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:29:52,100 INFO L82 PathProgramCache]: Analyzing trace with hash 968483498, now seen corresponding path program 1 times [2020-10-28 10:29:52,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:29:52,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578395646] [2020-10-28 10:29:52,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:29:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:29:52,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:29:52,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:29:52,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:29:57,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:29:57,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 974 [2020-10-28 10:29:57,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:29:57,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 10:29:57,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:29:57,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:29:57,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:29:57,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 10:29:57,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 10:29:57,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:29:57,535 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:29:57,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:29:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:29:57,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:29:57,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:29:57,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:29:57,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:29:57,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:29:57,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:29:57,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:29:57,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:29:57,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:29:57,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:29:57,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:29:57,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:29:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:29:57,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:29:57,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:29:57,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:29:57,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:29:57,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:29:57,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:29:57,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:29:57,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:29:57,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:29:57,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:29:57,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:29:57,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 10:29:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:29:57,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:29:57,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:29:57,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 10:29:57,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:29:57,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-28 10:29:57,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:29:57,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:29:57,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:29:57,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:29:57,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 10:29:57,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:29:57,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-10-28 10:29:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:29:57,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:29:57,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:29:57,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 10:29:57,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:29:57,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 10:29:57,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:29:57,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:29:57,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:29:57,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 10:29:57,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:29:57,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:29:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 151 proven. 47 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-28 10:29:58,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578395646] [2020-10-28 10:29:58,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:29:58,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:29:58,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565942985] [2020-10-28 10:29:58,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:29:58,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:29:58,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:29:58,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:29:58,335 INFO L87 Difference]: Start difference. First operand 27872 states and 35767 transitions. Second operand 8 states. [2020-10-28 10:29:58,783 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:30:01,689 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:30:02,236 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-28 10:30:43,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:30:43,902 INFO L93 Difference]: Finished difference Result 111794 states and 154252 transitions. [2020-10-28 10:30:43,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 10:30:43,903 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 952 [2020-10-28 10:30:43,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:30:44,252 INFO L225 Difference]: With dead ends: 111794 [2020-10-28 10:30:44,253 INFO L226 Difference]: Without dead ends: 83928 [2020-10-28 10:30:44,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 10:30:44,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83928 states. [2020-10-28 10:30:46,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83928 to 83918. [2020-10-28 10:30:46,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83918 states. [2020-10-28 10:30:47,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83918 states to 83918 states and 112110 transitions. [2020-10-28 10:30:47,423 INFO L78 Accepts]: Start accepts. Automaton has 83918 states and 112110 transitions. Word has length 952 [2020-10-28 10:30:47,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:30:47,424 INFO L481 AbstractCegarLoop]: Abstraction has 83918 states and 112110 transitions. [2020-10-28 10:30:47,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:30:47,424 INFO L276 IsEmpty]: Start isEmpty. Operand 83918 states and 112110 transitions. [2020-10-28 10:30:47,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 980 [2020-10-28 10:30:47,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:30:47,798 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:30:47,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 10:30:47,798 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:30:47,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:30:47,799 INFO L82 PathProgramCache]: Analyzing trace with hash 11346069, now seen corresponding path program 1 times [2020-10-28 10:30:47,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:30:47,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736274873] [2020-10-28 10:30:47,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:30:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:30:48,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:30:48,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:30:48,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:30:51,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:30:51,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:30:53,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:30:53,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1005 [2020-10-28 10:30:53,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 10:30:53,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-28 10:30:53,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:30:53,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:30:53,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:30:53,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-28 10:30:53,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 10:30:53,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:30:53,463 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:30:53,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:30:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:30:53,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:30:53,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:30:53,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:30:53,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:30:53,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 10:30:53,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:30:53,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:30:53,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:30:53,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:30:53,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:30:53,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:30:53,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:30:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:30:53,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:30:53,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:30:53,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:30:53,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:30:53,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:30:53,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:30:53,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:30:53,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:30:53,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:30:53,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:30:53,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:30:53,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 10:30:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:30:53,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:30:53,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:30:53,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 10:30:53,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:30:53,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 10:30:53,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:30:53,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:30:53,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:30:53,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:30:53,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:30:53,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:30:53,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 10:30:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:30:53,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:30:53,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:30:53,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 10:30:53,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:30:53,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-28 10:30:53,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:30:53,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:30:53,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:30:53,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:30:53,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 10:30:53,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:30:53,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-28 10:30:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:30:53,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:30:53,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:30:53,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 10:30:53,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:30:53,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-28 10:30:53,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:30:53,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:30:53,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:30:53,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:30:53,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 10:30:53,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:30:53,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-28 10:30:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:30:53,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:30:53,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:30:53,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 10:30:53,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:30:53,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 10:30:53,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:30:53,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:30:53,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:30:53,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 10:30:53,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:30:53,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:30:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 242 proven. 27 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-28 10:30:54,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736274873] [2020-10-28 10:30:54,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:30:54,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:30:54,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33674795] [2020-10-28 10:30:54,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:30:54,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:30:54,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:30:54,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:30:54,435 INFO L87 Difference]: Start difference. First operand 83918 states and 112110 transitions. Second operand 7 states. [2020-10-28 10:30:54,693 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 93