/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/Problem17_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:56:34,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:56:34,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:56:34,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:56:34,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:56:34,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:56:34,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:56:34,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:56:34,963 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:56:34,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:56:34,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:56:34,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:56:34,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:56:34,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:56:34,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:56:34,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:56:34,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:56:34,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:56:34,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:56:34,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:56:35,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:56:35,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:56:35,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:56:35,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:56:35,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:56:35,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:56:35,019 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:56:35,020 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:56:35,020 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:56:35,021 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:56:35,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:56:35,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:56:35,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:56:35,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:56:35,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:56:35,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:56:35,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:56:35,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:56:35,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:56:35,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:56:35,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:56:35,035 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 18:56:35,097 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:56:35,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:56:35,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:56:35,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:56:35,101 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:56:35,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:56:35,101 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:56:35,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:56:35,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:56:35,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:56:35,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:56:35,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:56:35,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:56:35,103 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:56:35,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:56:35,103 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:56:35,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:56:35,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:56:35,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:56:35,104 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:56:35,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:56:35,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:56:35,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:56:35,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:56:35,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:56:35,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:56:35,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:56:35,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:56:35,106 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:56:35,106 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:56:35,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:56:35,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:56:35,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:56:35,519 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:56:35,520 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:56:35,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label36.c [2020-10-27 18:56:35,614 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fda251ec/c78a7ca3f9834b1e8242f56683c07f3e/FLAGe64c082ca [2020-10-27 18:56:36,727 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:56:36,728 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label36.c [2020-10-27 18:56:36,762 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fda251ec/c78a7ca3f9834b1e8242f56683c07f3e/FLAGe64c082ca [2020-10-27 18:56:37,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fda251ec/c78a7ca3f9834b1e8242f56683c07f3e [2020-10-27 18:56:37,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:56:37,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:56:37,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:56:37,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:56:37,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:56:37,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:56:37" (1/1) ... [2020-10-27 18:56:37,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dd4ab53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:37, skipping insertion in model container [2020-10-27 18:56:37,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:56:37" (1/1) ... [2020-10-27 18:56:37,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:56:37,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:56:38,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:56:38,520 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:56:38,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:56:39,008 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:56:39,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:39 WrapperNode [2020-10-27 18:56:39,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:56:39,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:56:39,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:56:39,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:56:39,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:39" (1/1) ... [2020-10-27 18:56:39,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:39" (1/1) ... [2020-10-27 18:56:39,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:39" (1/1) ... [2020-10-27 18:56:39,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:39" (1/1) ... [2020-10-27 18:56:39,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:39" (1/1) ... [2020-10-27 18:56:39,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:39" (1/1) ... [2020-10-27 18:56:39,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:39" (1/1) ... [2020-10-27 18:56:39,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:56:39,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:56:39,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:56:39,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:56:39,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:39" (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 18:56:39,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:56:39,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:56:39,494 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:56:39,494 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:56:39,494 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:56:39,494 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:56:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:56:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:56:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:56:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:56:39,496 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:56:39,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:56:39,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:56:39,497 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:56:39,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:56:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:56:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:56:39,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:56:39,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:56:39,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:56:39,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:56:48,831 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:56:48,831 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:56:48,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:56:48 BoogieIcfgContainer [2020-10-27 18:56:48,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:56:48,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:56:48,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:56:48,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:56:48,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:56:37" (1/3) ... [2020-10-27 18:56:48,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dfeb34c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:56:48, skipping insertion in model container [2020-10-27 18:56:48,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:39" (2/3) ... [2020-10-27 18:56:48,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dfeb34c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:56:48, skipping insertion in model container [2020-10-27 18:56:48,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:56:48" (3/3) ... [2020-10-27 18:56:48,844 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label36.c [2020-10-27 18:56:48,858 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:56:48,864 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:56:48,880 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:56:48,914 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:56:48,915 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:56:48,915 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:56:48,915 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:56:48,915 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:56:48,915 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:56:48,915 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:56:48,915 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:56:48,950 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 18:56:48,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 18:56:48,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:56:48,967 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] [2020-10-27 18:56:48,967 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:56:48,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:56:48,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1179845790, now seen corresponding path program 1 times [2020-10-27 18:56:48,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:56:48,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305400737] [2020-10-27 18:56:48,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:56:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:56:49,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:49,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:56:49,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 18:56:49,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:56:49,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-27 18:56:49,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:56:49,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:56:49,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:56:49,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 18:56:49,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:56:49,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:56:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:56:50,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:50,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:56:50,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:56:50,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:56:50,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 18:56:50,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:56:50,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:56:50,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:56:50,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:56:50,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:56:50,054 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 18:56:50,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305400737] [2020-10-27 18:56:50,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:56:50,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:56:50,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28982151] [2020-10-27 18:56:50,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:56:50,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:56:50,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:56:50,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:56:50,087 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 18:57:06,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:57:06,425 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-27 18:57:06,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:57:06,428 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-27 18:57:06,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:57:06,454 INFO L225 Difference]: With dead ends: 1697 [2020-10-27 18:57:06,454 INFO L226 Difference]: Without dead ends: 1013 [2020-10-27 18:57:06,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:57:06,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-27 18:57:06,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-27 18:57:06,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-27 18:57:06,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-27 18:57:06,591 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 64 [2020-10-27 18:57:06,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:57:06,592 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-27 18:57:06,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:57:06,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-27 18:57:06,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 18:57:06,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:57:06,600 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, 1, 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 18:57:06,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:57:06,600 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:57:06,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:57:06,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1332526658, now seen corresponding path program 1 times [2020-10-27 18:57:06,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:57:06,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291916887] [2020-10-27 18:57:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:57:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:06,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:07,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:07,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:08,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:09,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:09,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 18:57:09,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:57:09,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2715 [2020-10-27 18:57:09,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:09,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:57:09,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 18:57:09,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 18:57:09,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:57:09,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:57:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:09,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:09,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:09,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:57:09,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:09,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:57:09,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:09,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:57:09,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:57:09,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:57:09,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:57:09,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:57:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:09,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:09,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:09,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 18:57:09,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:09,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-27 18:57:09,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:09,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:57:09,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:57:09,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 18:57:09,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:57:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:57:09,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291916887] [2020-10-27 18:57:09,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:57:09,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:57:09,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743410070] [2020-10-27 18:57:09,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:57:09,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:57:09,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:57:09,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:57:09,906 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 5 states. [2020-10-27 18:57:25,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:57:25,278 INFO L93 Difference]: Finished difference Result 2886 states and 4481 transitions. [2020-10-27 18:57:25,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:57:25,280 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-10-27 18:57:25,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:57:25,296 INFO L225 Difference]: With dead ends: 2886 [2020-10-27 18:57:25,297 INFO L226 Difference]: Without dead ends: 1889 [2020-10-27 18:57:25,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:57:25,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2020-10-27 18:57:25,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1885. [2020-10-27 18:57:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2020-10-27 18:57:25,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 2588 transitions. [2020-10-27 18:57:25,384 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 2588 transitions. Word has length 135 [2020-10-27 18:57:25,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:57:25,390 INFO L481 AbstractCegarLoop]: Abstraction has 1885 states and 2588 transitions. [2020-10-27 18:57:25,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:57:25,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 2588 transitions. [2020-10-27 18:57:25,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-27 18:57:25,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:57:25,405 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, 1, 1, 1, 1, 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 18:57:25,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:57:25,405 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:57:25,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:57:25,412 INFO L82 PathProgramCache]: Analyzing trace with hash 645369871, now seen corresponding path program 1 times [2020-10-27 18:57:25,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:57:25,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863316803] [2020-10-27 18:57:25,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:57:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:25,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:25,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:26,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:30,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:30,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-27 18:57:30,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:57:30,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 18:57:30,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:30,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 18:57:30,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 18:57:30,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 18:57:30,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:57:31,189 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2020-10-27 18:57:31,399 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2020-10-27 18:57:31,565 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2020-10-27 18:57:31,783 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2020-10-27 18:57:32,039 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-27 18:57:32,287 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2020-10-27 18:57:32,553 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-27 18:57:32,840 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-27 18:57:33,110 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-27 18:57:33,370 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-27 18:57:33,550 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-10-27 18:57:33,736 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-10-27 18:57:33,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:57:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:33,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:33,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:33,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:57:33,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:33,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:57:33,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:33,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:57:33,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:57:33,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:57:33,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:57:34,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:57:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:34,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:34,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:34,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 18:57:34,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:34,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-27 18:57:34,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:34,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:57:34,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:57:34,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:57:34,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:57:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:57:34,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863316803] [2020-10-27 18:57:34,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:57:34,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 18:57:34,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896859412] [2020-10-27 18:57:34,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 18:57:34,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:57:34,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 18:57:34,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2020-10-27 18:57:34,366 INFO L87 Difference]: Start difference. First operand 1885 states and 2588 transitions. Second operand 20 states. [2020-10-27 18:57:35,482 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-27 18:57:35,667 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-27 18:57:35,886 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-27 18:57:36,048 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-27 18:57:36,239 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-27 18:57:36,679 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-27 18:57:36,974 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-27 18:57:37,169 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-27 18:57:37,451 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-27 18:57:37,645 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-27 18:57:37,852 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-27 18:57:38,041 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-27 18:57:38,315 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-27 18:57:38,487 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-27 18:57:53,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:57:53,896 INFO L93 Difference]: Finished difference Result 4131 states and 5614 transitions. [2020-10-27 18:57:53,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 18:57:53,899 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 138 [2020-10-27 18:57:53,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:57:53,913 INFO L225 Difference]: With dead ends: 4131 [2020-10-27 18:57:53,914 INFO L226 Difference]: Without dead ends: 1889 [2020-10-27 18:57:53,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=478, Invalid=782, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 18:57:53,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2020-10-27 18:57:53,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1885. [2020-10-27 18:57:53,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2020-10-27 18:57:54,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 2421 transitions. [2020-10-27 18:57:54,001 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 2421 transitions. Word has length 138 [2020-10-27 18:57:54,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:57:54,003 INFO L481 AbstractCegarLoop]: Abstraction has 1885 states and 2421 transitions. [2020-10-27 18:57:54,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 18:57:54,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 2421 transitions. [2020-10-27 18:57:54,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-27 18:57:54,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:57:54,008 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:57:54,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:57:54,008 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:57:54,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:57:54,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1977868110, now seen corresponding path program 1 times [2020-10-27 18:57:54,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:57:54,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661225279] [2020-10-27 18:57:54,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:57:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:54,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:54,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:55,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:55,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:55,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-27 18:57:55,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:57:55,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1596 [2020-10-27 18:57:55,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:55,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:57:55,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 18:57:55,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 18:57:55,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:57:55,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:57:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:55,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:55,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:55,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:57:55,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:55,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:57:55,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:55,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:57:55,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:57:55,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:57:55,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:57:55,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:57:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:55,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:56,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:56,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 18:57:56,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:56,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-27 18:57:56,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:56,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:57:56,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:57:56,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 18:57:56,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:57:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:57:56,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661225279] [2020-10-27 18:57:56,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:57:56,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:57:56,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868077432] [2020-10-27 18:57:56,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:57:56,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:57:56,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:57:56,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:57:56,175 INFO L87 Difference]: Start difference. First operand 1885 states and 2421 transitions. Second operand 5 states. [2020-10-27 18:57:56,805 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 18:58:08,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:58:08,505 INFO L93 Difference]: Finished difference Result 3815 states and 4899 transitions. [2020-10-27 18:58:08,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:58:08,511 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2020-10-27 18:58:08,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:58:08,523 INFO L225 Difference]: With dead ends: 3815 [2020-10-27 18:58:08,524 INFO L226 Difference]: Without dead ends: 1889 [2020-10-27 18:58:08,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:58:08,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2020-10-27 18:58:08,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1885. [2020-10-27 18:58:08,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2020-10-27 18:58:08,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 2419 transitions. [2020-10-27 18:58:08,595 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 2419 transitions. Word has length 143 [2020-10-27 18:58:08,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:58:08,595 INFO L481 AbstractCegarLoop]: Abstraction has 1885 states and 2419 transitions. [2020-10-27 18:58:08,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:58:08,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 2419 transitions. [2020-10-27 18:58:08,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-27 18:58:08,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:58:08,603 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:58:08,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:58:08,603 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:58:08,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:58:08,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1082982494, now seen corresponding path program 1 times [2020-10-27 18:58:08,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:58:08,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186876505] [2020-10-27 18:58:08,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:58:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:08,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:08,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:08,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 18:58:08,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:08,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-27 18:58:08,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:08,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:58:08,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 18:58:08,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 18:58:08,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:09,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:58:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:09,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:09,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:09,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:58:09,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:09,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 18:58:09,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:09,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:58:09,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:09,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:58:09,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:09,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:58:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:09,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:09,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:09,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:58:09,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:09,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-27 18:58:09,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:09,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:58:09,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:09,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 18:58:09,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:58:09,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186876505] [2020-10-27 18:58:09,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:58:09,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:58:09,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366539267] [2020-10-27 18:58:09,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:58:09,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:58:09,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:58:09,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:58:09,379 INFO L87 Difference]: Start difference. First operand 1885 states and 2419 transitions. Second operand 6 states. [2020-10-27 18:58:25,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:58:25,043 INFO L93 Difference]: Finished difference Result 5533 states and 7154 transitions. [2020-10-27 18:58:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:58:25,047 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 151 [2020-10-27 18:58:25,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:58:25,067 INFO L225 Difference]: With dead ends: 5533 [2020-10-27 18:58:25,067 INFO L226 Difference]: Without dead ends: 3654 [2020-10-27 18:58:25,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:58:25,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3654 states. [2020-10-27 18:58:25,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3654 to 2779. [2020-10-27 18:58:25,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2779 states. [2020-10-27 18:58:25,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 3696 transitions. [2020-10-27 18:58:25,188 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 3696 transitions. Word has length 151 [2020-10-27 18:58:25,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:58:25,188 INFO L481 AbstractCegarLoop]: Abstraction has 2779 states and 3696 transitions. [2020-10-27 18:58:25,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:58:25,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 3696 transitions. [2020-10-27 18:58:25,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 18:58:25,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:58:25,191 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:58:25,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:58:25,192 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:58:25,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:58:25,192 INFO L82 PathProgramCache]: Analyzing trace with hash -548359026, now seen corresponding path program 1 times [2020-10-27 18:58:25,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:58:25,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788688944] [2020-10-27 18:58:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:58:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:25,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:25,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:26,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:26,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 18:58:26,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:58:26,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1185 [2020-10-27 18:58:26,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:26,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:58:26,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-27 18:58:26,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 18:58:26,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:26,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:58:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:26,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:26,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:26,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:58:26,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:26,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 18:58:26,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:26,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:58:26,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:26,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:58:26,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:26,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:58:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:26,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:26,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:26,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 18:58:26,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:26,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-27 18:58:26,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:26,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:58:26,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:26,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 18:58:26,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:58:26,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788688944] [2020-10-27 18:58:26,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:58:26,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:58:26,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910128467] [2020-10-27 18:58:26,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:58:26,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:58:26,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:58:26,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:58:26,844 INFO L87 Difference]: Start difference. First operand 2779 states and 3696 transitions. Second operand 5 states. [2020-10-27 18:58:43,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:58:43,489 INFO L93 Difference]: Finished difference Result 6892 states and 9457 transitions. [2020-10-27 18:58:43,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:58:43,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2020-10-27 18:58:43,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:58:43,522 INFO L225 Difference]: With dead ends: 6892 [2020-10-27 18:58:43,523 INFO L226 Difference]: Without dead ends: 4119 [2020-10-27 18:58:43,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:58:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states. [2020-10-27 18:58:43,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4119 to 4112. [2020-10-27 18:58:43,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4112 states. [2020-10-27 18:58:43,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4112 states to 4112 states and 5221 transitions. [2020-10-27 18:58:43,681 INFO L78 Accepts]: Start accepts. Automaton has 4112 states and 5221 transitions. Word has length 161 [2020-10-27 18:58:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:58:43,682 INFO L481 AbstractCegarLoop]: Abstraction has 4112 states and 5221 transitions. [2020-10-27 18:58:43,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:58:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 4112 states and 5221 transitions. [2020-10-27 18:58:43,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-27 18:58:43,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:58:43,687 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:58:43,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:58:43,687 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:58:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:58:43,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1341536103, now seen corresponding path program 1 times [2020-10-27 18:58:43,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:58:43,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969404248] [2020-10-27 18:58:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:58:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:43,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:43,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:44,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:45,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:45,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-27 18:58:45,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:58:45,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2183 [2020-10-27 18:58:45,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:45,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:58:45,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 138 [2020-10-27 18:58:45,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 18:58:45,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:46,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:58:46,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:46,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:46,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:46,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:58:46,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:46,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:58:46,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:46,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:58:46,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:46,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:58:46,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:46,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:58:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:46,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:46,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:46,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 18:58:46,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:46,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-27 18:58:46,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:46,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:58:46,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:46,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-27 18:58:46,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:58:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:58:46,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969404248] [2020-10-27 18:58:46,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:58:46,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:58:46,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479418302] [2020-10-27 18:58:46,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:58:46,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:58:46,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:58:46,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:58:46,462 INFO L87 Difference]: Start difference. First operand 4112 states and 5221 transitions. Second operand 5 states. [2020-10-27 18:59:04,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:59:04,699 INFO L93 Difference]: Finished difference Result 9997 states and 13104 transitions. [2020-10-27 18:59:04,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:59:04,705 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 192 [2020-10-27 18:59:04,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:59:04,736 INFO L225 Difference]: With dead ends: 9997 [2020-10-27 18:59:04,736 INFO L226 Difference]: Without dead ends: 5891 [2020-10-27 18:59:04,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:59:04,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5891 states. [2020-10-27 18:59:04,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5891 to 5016. [2020-10-27 18:59:04,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5016 states. [2020-10-27 18:59:04,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5016 states to 5016 states and 6380 transitions. [2020-10-27 18:59:04,911 INFO L78 Accepts]: Start accepts. Automaton has 5016 states and 6380 transitions. Word has length 192 [2020-10-27 18:59:04,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:59:04,912 INFO L481 AbstractCegarLoop]: Abstraction has 5016 states and 6380 transitions. [2020-10-27 18:59:04,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:59:04,913 INFO L276 IsEmpty]: Start isEmpty. Operand 5016 states and 6380 transitions. [2020-10-27 18:59:04,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-27 18:59:04,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:59:04,918 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:59:04,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:59:04,918 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:59:04,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:59:04,919 INFO L82 PathProgramCache]: Analyzing trace with hash -693818398, now seen corresponding path program 1 times [2020-10-27 18:59:04,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:59:04,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849237327] [2020-10-27 18:59:04,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:59:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:05,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:05,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:05,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:06,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:06,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:07,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:07,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-27 18:59:07,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:59:07,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2596 [2020-10-27 18:59:07,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:07,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:59:07,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-10-27 18:59:07,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 18:59:07,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:07,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:59:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:07,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:07,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:07,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:59:07,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:07,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:59:07,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:07,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:07,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:07,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:07,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:59:07,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:59:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:07,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:07,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:08,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:08,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 18:59:08,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:59:08,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 448 [2020-10-27 18:59:08,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:08,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:59:08,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 137 [2020-10-27 18:59:08,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:59:08,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:59:08,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849237327] [2020-10-27 18:59:08,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:59:08,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:59:08,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315769736] [2020-10-27 18:59:08,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:59:08,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:59:08,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:59:08,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:59:08,423 INFO L87 Difference]: Start difference. First operand 5016 states and 6380 transitions. Second operand 6 states. [2020-10-27 18:59:10,198 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-27 18:59:38,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:59:38,280 INFO L93 Difference]: Finished difference Result 16201 states and 22094 transitions. [2020-10-27 18:59:38,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 18:59:38,284 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 208 [2020-10-27 18:59:38,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:59:38,333 INFO L225 Difference]: With dead ends: 16201 [2020-10-27 18:59:38,334 INFO L226 Difference]: Without dead ends: 11191 [2020-10-27 18:59:38,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-27 18:59:38,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11191 states. [2020-10-27 18:59:38,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11191 to 10309. [2020-10-27 18:59:38,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10309 states. [2020-10-27 18:59:38,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10309 states to 10309 states and 12926 transitions. [2020-10-27 18:59:38,669 INFO L78 Accepts]: Start accepts. Automaton has 10309 states and 12926 transitions. Word has length 208 [2020-10-27 18:59:38,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:59:38,670 INFO L481 AbstractCegarLoop]: Abstraction has 10309 states and 12926 transitions. [2020-10-27 18:59:38,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:59:38,670 INFO L276 IsEmpty]: Start isEmpty. Operand 10309 states and 12926 transitions. [2020-10-27 18:59:38,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-27 18:59:38,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:59:38,676 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 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 18:59:38,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:59:38,677 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:59:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:59:38,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1861064176, now seen corresponding path program 1 times [2020-10-27 18:59:38,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:59:38,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235160151] [2020-10-27 18:59:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:59:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:38,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:38,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:39,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:39,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:42,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:42,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:43,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:43,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-27 18:59:43,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 18:59:43,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 18:59:43,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:43,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:59:43,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-10-27 18:59:43,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 18:59:43,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:43,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:59:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:43,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:43,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:43,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:59:43,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:43,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:59:43,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:43,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:43,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:43,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:43,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:43,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:59:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:43,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:44,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:44,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 18:59:44,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:44,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 18:59:44,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:44,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:44,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:44,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:44,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:59:44,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-27 18:59:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:44,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:44,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:44,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 18:59:44,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:44,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 18:59:44,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:44,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:59:44,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:44,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 18:59:44,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-27 18:59:44,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235160151] [2020-10-27 18:59:44,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:59:44,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:59:44,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323322070] [2020-10-27 18:59:44,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:59:44,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:59:44,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:59:44,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:59:44,231 INFO L87 Difference]: Start difference. First operand 10309 states and 12926 transitions. Second operand 5 states. [2020-10-27 18:59:45,142 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:59:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:59:58,455 INFO L93 Difference]: Finished difference Result 24958 states and 31350 transitions. [2020-10-27 18:59:58,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:59:58,457 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 221 [2020-10-27 18:59:58,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:59:58,522 INFO L225 Difference]: With dead ends: 24958 [2020-10-27 18:59:58,522 INFO L226 Difference]: Without dead ends: 14655 [2020-10-27 18:59:58,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:59:58,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14655 states. [2020-10-27 18:59:58,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14655 to 11187. [2020-10-27 18:59:58,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11187 states. [2020-10-27 18:59:58,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11187 states to 11187 states and 14278 transitions. [2020-10-27 18:59:58,922 INFO L78 Accepts]: Start accepts. Automaton has 11187 states and 14278 transitions. Word has length 221 [2020-10-27 18:59:58,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:59:58,923 INFO L481 AbstractCegarLoop]: Abstraction has 11187 states and 14278 transitions. [2020-10-27 18:59:58,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:59:58,923 INFO L276 IsEmpty]: Start isEmpty. Operand 11187 states and 14278 transitions. [2020-10-27 18:59:58,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-27 18:59:58,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:59:58,930 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 18:59:58,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:59:58,930 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:59:58,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:59:58,931 INFO L82 PathProgramCache]: Analyzing trace with hash -995265734, now seen corresponding path program 1 times [2020-10-27 18:59:58,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:59:58,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758510845] [2020-10-27 18:59:58,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:59:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:59,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:59,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:00,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:01,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:02,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:02,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-27 19:00:02,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:00:02,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3645 [2020-10-27 19:00:02,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:02,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:00:02,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-10-27 19:00:02,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:00:02,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:02,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:00:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:02,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:02,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:02,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:00:02,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:00:02,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:00:02,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:02,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:00:02,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:00:02,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:00:02,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:02,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:00:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:02,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:02,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:02,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 19:00:02,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:00:02,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 19:00:02,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:02,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:00:02,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:00:02,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:00:02,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:02,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 19:00:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:03,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:03,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:03,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 19:00:03,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:00:03,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-27 19:00:03,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:03,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:00:03,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:00:03,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 19:00:03,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-27 19:00:03,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758510845] [2020-10-27 19:00:03,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:00:03,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:00:03,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588754406] [2020-10-27 19:00:03,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:00:03,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:00:03,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:00:03,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:00:03,196 INFO L87 Difference]: Start difference. First operand 11187 states and 14278 transitions. Second operand 5 states. [2020-10-27 19:00:07,173 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-27 19:00:19,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:00:19,766 INFO L93 Difference]: Finished difference Result 22404 states and 28658 transitions. [2020-10-27 19:00:19,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:00:19,771 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 226 [2020-10-27 19:00:19,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:00:19,809 INFO L225 Difference]: With dead ends: 22404 [2020-10-27 19:00:19,810 INFO L226 Difference]: Without dead ends: 11191 [2020-10-27 19:00:19,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:00:19,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11191 states. [2020-10-27 19:00:20,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11191 to 11187. [2020-10-27 19:00:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11187 states. [2020-10-27 19:00:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11187 states to 11187 states and 14273 transitions. [2020-10-27 19:00:20,087 INFO L78 Accepts]: Start accepts. Automaton has 11187 states and 14273 transitions. Word has length 226 [2020-10-27 19:00:20,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:00:20,088 INFO L481 AbstractCegarLoop]: Abstraction has 11187 states and 14273 transitions. [2020-10-27 19:00:20,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:00:20,088 INFO L276 IsEmpty]: Start isEmpty. Operand 11187 states and 14273 transitions. [2020-10-27 19:00:20,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-27 19:00:20,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:00:20,096 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:00:20,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:00:20,096 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:00:20,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:00:20,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1700012076, now seen corresponding path program 1 times [2020-10-27 19:00:20,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:00:20,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146369181] [2020-10-27 19:00:20,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:00:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:20,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:20,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:20,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:21,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:22,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:22,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-27 19:00:22,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:00:22,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2215 [2020-10-27 19:00:22,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:22,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:00:22,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 187 [2020-10-27 19:00:22,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 19:00:22,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:22,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:00:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:22,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:22,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:22,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:00:22,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:00:22,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:00:22,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:22,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:00:22,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:00:22,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:00:22,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:22,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:00:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:22,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:22,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:22,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 19:00:22,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:00:22,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 19:00:22,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:22,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:00:22,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:00:22,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:00:22,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:22,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 19:00:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:22,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:22,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:22,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 19:00:22,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:00:22,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-27 19:00:22,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:22,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:00:22,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:00:22,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 19:00:22,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-27 19:00:22,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146369181] [2020-10-27 19:00:22,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:00:22,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:00:22,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600876155] [2020-10-27 19:00:22,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:00:22,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:00:22,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:00:22,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:00:22,905 INFO L87 Difference]: Start difference. First operand 11187 states and 14273 transitions. Second operand 5 states.