/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem06_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 16:37:58,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 16:37:58,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 16:37:58,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 16:37:58,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 16:37:58,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 16:37:58,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 16:37:58,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 16:37:58,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 16:37:58,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 16:37:58,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 16:37:58,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 16:37:58,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 16:37:58,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 16:37:58,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 16:37:58,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 16:37:58,269 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 16:37:58,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 16:37:58,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 16:37:58,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 16:37:58,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 16:37:58,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 16:37:58,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 16:37:58,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 16:37:58,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 16:37:58,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 16:37:58,296 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 16:37:58,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 16:37:58,298 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 16:37:58,299 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 16:37:58,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 16:37:58,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 16:37:58,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 16:37:58,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 16:37:58,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 16:37:58,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 16:37:58,321 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 16:37:58,321 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 16:37:58,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 16:37:58,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 16:37:58,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 16:37:58,328 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 16:37:58,373 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 16:37:58,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 16:37:58,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 16:37:58,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 16:37:58,376 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 16:37:58,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 16:37:58,376 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 16:37:58,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 16:37:58,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 16:37:58,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 16:37:58,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 16:37:58,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 16:37:58,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 16:37:58,377 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 16:37:58,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 16:37:58,378 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 16:37:58,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 16:37:58,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 16:37:58,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 16:37:58,378 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 16:37:58,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 16:37:58,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:37:58,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 16:37:58,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 16:37:58,379 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 16:37:58,380 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 16:37:58,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 16:37:58,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 16:37:58,380 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 16:37:58,380 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 16:37:58,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 16:37:58,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 16:37:58,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 16:37:58,801 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 16:37:58,802 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 16:37:58,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label56.c [2020-10-27 16:37:58,901 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aceda134d/b49ad4f538da4256a7640757063b98c0/FLAG040d5a2b9 [2020-10-27 16:38:00,142 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 16:38:00,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label56.c [2020-10-27 16:38:00,188 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aceda134d/b49ad4f538da4256a7640757063b98c0/FLAG040d5a2b9 [2020-10-27 16:38:00,502 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aceda134d/b49ad4f538da4256a7640757063b98c0 [2020-10-27 16:38:00,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 16:38:00,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 16:38:00,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 16:38:00,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 16:38:00,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 16:38:00,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:38:00" (1/1) ... [2020-10-27 16:38:00,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e70e563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:38:00, skipping insertion in model container [2020-10-27 16:38:00,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:38:00" (1/1) ... [2020-10-27 16:38:00,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 16:38:00,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 16:38:02,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:38:02,919 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 16:38:04,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:38:04,191 INFO L208 MainTranslator]: Completed translation [2020-10-27 16:38:04,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:38:04 WrapperNode [2020-10-27 16:38:04,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 16:38:04,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 16:38:04,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 16:38:04,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 16:38:04,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:38:04" (1/1) ... [2020-10-27 16:38:04,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:38:04" (1/1) ... [2020-10-27 16:38:04,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:38:04" (1/1) ... [2020-10-27 16:38:04,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:38:04" (1/1) ... [2020-10-27 16:38:04,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:38:04" (1/1) ... [2020-10-27 16:38:04,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:38:04" (1/1) ... [2020-10-27 16:38:04,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:38:04" (1/1) ... [2020-10-27 16:38:04,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 16:38:04,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 16:38:04,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 16:38:04,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 16:38:04,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:38:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:38:04,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 16:38:04,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 16:38:04,972 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 16:38:04,972 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 16:38:04,972 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 16:38:04,972 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 16:38:04,973 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 16:38:04,973 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 16:38:04,973 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 16:38:04,973 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 16:38:04,973 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 16:38:04,973 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 16:38:04,974 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 16:38:04,974 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 16:38:04,974 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 16:38:04,974 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 16:38:04,974 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 16:38:04,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 16:38:04,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 16:38:04,975 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 16:38:04,975 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 16:38:04,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 16:38:04,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 16:38:04,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 16:38:04,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 16:38:04,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 16:38:04,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 16:38:12,827 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 16:38:12,828 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 16:38:12,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:38:12 BoogieIcfgContainer [2020-10-27 16:38:12,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 16:38:12,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 16:38:12,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 16:38:12,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 16:38:12,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:38:00" (1/3) ... [2020-10-27 16:38:12,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38bad38f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:38:12, skipping insertion in model container [2020-10-27 16:38:12,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:38:04" (2/3) ... [2020-10-27 16:38:12,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38bad38f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:38:12, skipping insertion in model container [2020-10-27 16:38:12,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:38:12" (3/3) ... [2020-10-27 16:38:12,846 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label56.c [2020-10-27 16:38:12,860 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 16:38:12,866 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 16:38:12,881 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 16:38:12,932 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 16:38:12,932 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 16:38:12,932 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 16:38:12,932 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 16:38:12,932 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 16:38:12,933 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 16:38:12,933 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 16:38:12,933 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 16:38:12,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-27 16:38:13,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 968 [2020-10-27 16:38:13,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:38:13,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:38:13,064 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:38:13,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:38:13,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1815280636, now seen corresponding path program 1 times [2020-10-27 16:38:13,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:38:13,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530215970] [2020-10-27 16:38:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:38:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:38:14,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:38:16,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:38:19,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:38:19,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 985 [2020-10-27 16:38:19,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:38:19,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5416 [2020-10-27 16:38:19,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:38:19,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 16:38:19,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:38:19,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 769 [2020-10-27 16:38:19,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 16:38:23,655 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-27 16:38:23,900 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-27 16:38:24,166 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-27 16:38:24,489 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-10-27 16:38:24,748 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-27 16:38:25,023 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-27 16:38:25,302 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-27 16:38:25,548 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-27 16:38:25,805 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-27 16:38:26,042 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-27 16:38:26,763 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:38:26,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:38:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:38:26,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:38:26,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:38:26,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:38:26,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:38:26,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-27 16:38:26,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:38:26,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:38:26,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:38:26,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:38:26,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:38:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:38:40,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530215970] [2020-10-27 16:38:40,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:38:40,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-27 16:38:40,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514251684] [2020-10-27 16:38:40,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 16:38:40,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:38:40,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 16:38:40,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-27 16:38:40,596 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 18 states. [2020-10-27 16:38:41,212 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 16:38:42,282 WARN L193 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 197 [2020-10-27 16:38:43,349 WARN L193 SmtUtils]: Spent 986.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 197 [2020-10-27 16:38:44,461 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 215 DAG size of output: 205 [2020-10-27 16:38:49,145 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 237 DAG size of output: 204 [2020-10-27 16:38:53,466 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 240 DAG size of output: 203 [2020-10-27 16:38:56,590 WARN L193 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 194 [2020-10-27 16:38:57,745 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 225 DAG size of output: 200 [2020-10-27 16:38:59,209 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 223 DAG size of output: 199 [2020-10-27 16:39:10,198 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 192 [2020-10-27 16:39:11,286 WARN L193 SmtUtils]: Spent 999.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 197 [2020-10-27 16:39:14,758 WARN L193 SmtUtils]: Spent 947.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 196 [2020-10-27 16:39:23,007 WARN L193 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 190 [2020-10-27 16:39:24,091 WARN L193 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 194 [2020-10-27 16:39:27,041 WARN L193 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 192 [2020-10-27 16:39:40,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:39:40,832 INFO L93 Difference]: Finished difference Result 3401 states and 6365 transitions. [2020-10-27 16:39:40,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 16:39:40,835 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 967 [2020-10-27 16:39:40,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:39:40,895 INFO L225 Difference]: With dead ends: 3401 [2020-10-27 16:39:40,896 INFO L226 Difference]: Without dead ends: 2020 [2020-10-27 16:39:40,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 16:39:40,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-27 16:39:41,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2020. [2020-10-27 16:39:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2020-10-27 16:39:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3054 transitions. [2020-10-27 16:39:41,128 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3054 transitions. Word has length 967 [2020-10-27 16:39:41,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:39:41,131 INFO L481 AbstractCegarLoop]: Abstraction has 2020 states and 3054 transitions. [2020-10-27 16:39:41,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 16:39:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3054 transitions. [2020-10-27 16:39:41,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1038 [2020-10-27 16:39:41,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:39:41,178 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:39:41,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 16:39:41,179 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:39:41,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:39:41,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1959185435, now seen corresponding path program 1 times [2020-10-27 16:39:41,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:39:41,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524337983] [2020-10-27 16:39:41,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:39:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:39:41,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:43,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:46,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:39:46,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1057 [2020-10-27 16:39:46,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:39:46,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5148 [2020-10-27 16:39:46,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:39:46,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 16:39:46,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:39:46,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1048 [2020-10-27 16:39:46,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:39:47,539 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:39:47,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:39:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:39:47,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:47,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:39:47,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:39:47,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:39:47,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 16:39:47,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:39:47,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:39:47,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:39:47,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:39:47,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:39:47,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:39:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:39:47,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:47,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:39:47,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 16:39:47,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:39:47,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-27 16:39:47,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:39:47,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:39:47,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:39:47,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 16:39:47,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:39:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 16:39:49,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524337983] [2020-10-27 16:39:49,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:39:49,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:39:49,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201809644] [2020-10-27 16:39:49,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 16:39:49,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:39:49,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 16:39:49,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:39:49,902 INFO L87 Difference]: Start difference. First operand 2020 states and 3054 transitions. Second operand 6 states. [2020-10-27 16:39:50,165 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:40:09,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:40:09,549 INFO L93 Difference]: Finished difference Result 4414 states and 7423 transitions. [2020-10-27 16:40:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 16:40:09,550 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1037 [2020-10-27 16:40:09,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:40:09,570 INFO L225 Difference]: With dead ends: 4414 [2020-10-27 16:40:09,571 INFO L226 Difference]: Without dead ends: 3154 [2020-10-27 16:40:09,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:40:09,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2020-10-27 16:40:09,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 3131. [2020-10-27 16:40:09,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3131 states. [2020-10-27 16:40:09,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 4740 transitions. [2020-10-27 16:40:09,696 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 4740 transitions. Word has length 1037 [2020-10-27 16:40:09,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:40:09,699 INFO L481 AbstractCegarLoop]: Abstraction has 3131 states and 4740 transitions. [2020-10-27 16:40:09,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 16:40:09,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 4740 transitions. [2020-10-27 16:40:09,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1050 [2020-10-27 16:40:09,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:40:09,721 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:40:09,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 16:40:09,722 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:40:09,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:40:09,723 INFO L82 PathProgramCache]: Analyzing trace with hash 118227394, now seen corresponding path program 1 times [2020-10-27 16:40:09,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:40:09,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982991821] [2020-10-27 16:40:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:40:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:09,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:10,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:15,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:15,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1071 [2020-10-27 16:40:15,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:40:15,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5272 [2020-10-27 16:40:15,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:15,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:40:15,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 16:40:15,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 16:40:15,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:40:15,699 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:40:15,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:40:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:15,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:15,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:15,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:40:15,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:40:15,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 16:40:15,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:15,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:40:15,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:40:15,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:40:15,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:40:15,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:40:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:15,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:15,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:15,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 16:40:15,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:40:15,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-27 16:40:15,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:15,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:40:15,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:40:15,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 16:40:15,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 16:40:16,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-27 16:40:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:16,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:16,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:16,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-27 16:40:16,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:40:16,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-27 16:40:16,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:16,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:40:16,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:40:16,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 16:40:16,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 16:40:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 16:40:17,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982991821] [2020-10-27 16:40:17,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:40:17,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 16:40:17,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887198515] [2020-10-27 16:40:17,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 16:40:17,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:40:17,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 16:40:17,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:40:17,257 INFO L87 Difference]: Start difference. First operand 3131 states and 4740 transitions. Second operand 7 states. [2020-10-27 16:40:17,929 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:40:19,216 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:40:51,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:40:51,957 INFO L93 Difference]: Finished difference Result 9978 states and 16478 transitions. [2020-10-27 16:40:51,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 16:40:51,960 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1049 [2020-10-27 16:40:51,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:40:52,009 INFO L225 Difference]: With dead ends: 9978 [2020-10-27 16:40:52,009 INFO L226 Difference]: Without dead ends: 7607 [2020-10-27 16:40:52,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 16:40:52,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2020-10-27 16:40:52,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 7532. [2020-10-27 16:40:52,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7532 states. [2020-10-27 16:40:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7532 states to 7532 states and 11166 transitions. [2020-10-27 16:40:52,277 INFO L78 Accepts]: Start accepts. Automaton has 7532 states and 11166 transitions. Word has length 1049 [2020-10-27 16:40:52,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:40:52,278 INFO L481 AbstractCegarLoop]: Abstraction has 7532 states and 11166 transitions. [2020-10-27 16:40:52,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 16:40:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 7532 states and 11166 transitions. [2020-10-27 16:40:52,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1054 [2020-10-27 16:40:52,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:40:52,313 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:40:52,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 16:40:52,314 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:40:52,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:40:52,315 INFO L82 PathProgramCache]: Analyzing trace with hash -490176502, now seen corresponding path program 1 times [2020-10-27 16:40:52,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:40:52,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478424691] [2020-10-27 16:40:52,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:40:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:52,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:54,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:56,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:57,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:57,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1075 [2020-10-27 16:40:57,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:40:57,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5146 [2020-10-27 16:40:57,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:57,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:40:57,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 16:40:57,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 974 [2020-10-27 16:40:57,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:40:58,588 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:40:58,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:40:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:58,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:58,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:58,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:40:58,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:40:58,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 16:40:58,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:58,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:40:58,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:40:58,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:40:58,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:40:58,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:40:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:58,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:58,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:58,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 16:40:58,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:40:58,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 16:40:58,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:58,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:40:58,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:40:58,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:40:58,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:40:58,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-27 16:40:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:58,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:58,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:58,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 16:40:58,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:40:58,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 16:40:58,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:58,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:40:58,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:40:58,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 16:40:58,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:41:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 16:41:00,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478424691] [2020-10-27 16:41:00,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:41:00,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:41:00,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385488335] [2020-10-27 16:41:00,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:41:00,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:41:00,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:41:00,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:41:00,194 INFO L87 Difference]: Start difference. First operand 7532 states and 11166 transitions. Second operand 5 states. [2020-10-27 16:41:00,946 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:41:22,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:41:22,126 INFO L93 Difference]: Finished difference Result 20686 states and 32160 transitions. [2020-10-27 16:41:22,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:41:22,128 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1053 [2020-10-27 16:41:22,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:41:22,199 INFO L225 Difference]: With dead ends: 20686 [2020-10-27 16:41:22,200 INFO L226 Difference]: Without dead ends: 13914 [2020-10-27 16:41:22,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:41:22,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13914 states. [2020-10-27 16:41:22,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13914 to 13848. [2020-10-27 16:41:22,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13848 states. [2020-10-27 16:41:22,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13848 states to 13848 states and 19588 transitions. [2020-10-27 16:41:22,619 INFO L78 Accepts]: Start accepts. Automaton has 13848 states and 19588 transitions. Word has length 1053 [2020-10-27 16:41:22,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:41:22,622 INFO L481 AbstractCegarLoop]: Abstraction has 13848 states and 19588 transitions. [2020-10-27 16:41:22,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:41:22,622 INFO L276 IsEmpty]: Start isEmpty. Operand 13848 states and 19588 transitions. [2020-10-27 16:41:22,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1063 [2020-10-27 16:41:22,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:41:22,681 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:41:22,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 16:41:22,682 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:41:22,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:41:22,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1527088542, now seen corresponding path program 1 times [2020-10-27 16:41:22,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:41:22,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902517165] [2020-10-27 16:41:22,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:41:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:41:22,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:41:23,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:41:24,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:41:27,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:41:27,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:41:27,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1086 [2020-10-27 16:41:27,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 16:41:27,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5127 [2020-10-27 16:41:27,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:41:27,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:41:27,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 16:41:27,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 16:41:27,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:41:28,430 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:41:28,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:41:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:41:28,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:41:28,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:41:28,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:41:28,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:41:28,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 16:41:28,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:41:28,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:41:28,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:41:28,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:41:28,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:41:28,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:41:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:41:28,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:41:28,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:41:28,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 16:41:28,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:41:28,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-27 16:41:28,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:41:28,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:41:28,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:41:28,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 16:41:28,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:41:28,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-27 16:41:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:41:28,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:41:28,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:41:28,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 16:41:28,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:41:28,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 16:41:28,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:41:28,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:41:28,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:41:28,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 16:41:28,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:41:28,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-27 16:41:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:41:28,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:41:28,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:41:28,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-27 16:41:28,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:41:28,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 16:41:28,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:41:28,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:41:28,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-27 16:41:28,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:41:28,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:41:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 100 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 16:41:29,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902517165] [2020-10-27 16:41:29,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:41:29,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 16:41:29,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729912772] [2020-10-27 16:41:29,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 16:41:29,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:41:29,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 16:41:29,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:41:29,475 INFO L87 Difference]: Start difference. First operand 13848 states and 19588 transitions. Second operand 7 states. [2020-10-27 16:41:30,225 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 16:41:31,431 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 162