/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:43:31,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:43:31,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:43:31,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:43:31,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:43:31,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:43:31,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:43:31,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:43:31,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:43:31,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:43:31,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:43:31,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:43:31,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:43:31,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:43:31,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:43:31,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:43:31,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:43:31,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:43:31,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:43:31,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:43:31,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:43:31,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:43:31,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:43:31,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:43:31,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:43:31,933 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:43:31,933 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:43:31,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:43:31,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:43:31,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 00:43:31,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:43:31,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:43:31,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:43:31,956 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 00:43:32,017 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:43:32,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:43:32,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:43:32,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:43:32,024 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:43:32,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:43:32,025 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:43:32,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:43:32,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:43:32,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:43:32,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:43:32,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:43:32,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:43:32,027 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:43:32,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:43:32,028 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:43:32,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:43:32,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:43:32,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:43:32,028 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:43:32,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:43:32,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:43:32,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:43:32,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:43:32,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:43:32,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:43:32,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:43:32,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:43:32,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:43:32,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:43:32,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:43:32,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:43:32,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:43:32,495 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:43:32,496 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:43:32,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label22.c [2020-10-27 00:43:32,596 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd5f9720f/35e3ab03106d460ca45ab9fb19296432/FLAG6b9163d9d [2020-10-27 00:43:34,015 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:43:34,016 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label22.c [2020-10-27 00:43:34,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd5f9720f/35e3ab03106d460ca45ab9fb19296432/FLAG6b9163d9d [2020-10-27 00:43:34,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd5f9720f/35e3ab03106d460ca45ab9fb19296432 [2020-10-27 00:43:34,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:43:34,247 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:43:34,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:43:34,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:43:34,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:43:34,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:43:34" (1/1) ... [2020-10-27 00:43:34,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d463e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:43:34, skipping insertion in model container [2020-10-27 00:43:34,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:43:34" (1/1) ... [2020-10-27 00:43:34,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:43:34,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:43:36,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:43:37,009 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:43:38,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:43:38,424 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:43:38,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:43:38 WrapperNode [2020-10-27 00:43:38,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:43:38,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:43:38,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:43:38,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:43:38,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:43:38" (1/1) ... [2020-10-27 00:43:38,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:43:38" (1/1) ... [2020-10-27 00:43:38,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:43:38" (1/1) ... [2020-10-27 00:43:38,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:43:38" (1/1) ... [2020-10-27 00:43:38,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:43:38" (1/1) ... [2020-10-27 00:43:38,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:43:38" (1/1) ... [2020-10-27 00:43:39,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:43:38" (1/1) ... [2020-10-27 00:43:39,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:43:39,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:43:39,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:43:39,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:43:39,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:43:38" (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 00:43:39,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:43:39,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:43:39,215 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:43:39,216 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:43:39,216 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:43:39,216 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:43:39,216 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:43:39,216 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:43:39,216 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:43:39,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:43:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:43:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:43:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:43:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:43:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:43:39,218 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:43:39,218 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:43:39,220 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:43:39,220 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:43:39,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:43:39,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:43:39,221 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:43:39,221 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:43:39,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:43:39,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:43:39,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:43:39,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:43:39,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:43:39,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:43:56,398 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:43:56,399 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:43:56,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:43:56 BoogieIcfgContainer [2020-10-27 00:43:56,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:43:56,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:43:56,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:43:56,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:43:56,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:43:34" (1/3) ... [2020-10-27 00:43:56,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596876c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:43:56, skipping insertion in model container [2020-10-27 00:43:56,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:43:38" (2/3) ... [2020-10-27 00:43:56,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596876c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:43:56, skipping insertion in model container [2020-10-27 00:43:56,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:43:56" (3/3) ... [2020-10-27 00:43:56,422 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label22.c [2020-10-27 00:43:56,436 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:43:56,443 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:43:56,459 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:43:56,501 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:43:56,501 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:43:56,501 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:43:56,501 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:43:56,502 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:43:56,502 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:43:56,502 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:43:56,502 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:43:56,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:43:56,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 00:43:56,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:43:56,563 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] [2020-10-27 00:43:56,564 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:43:56,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:43:56,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1209651973, now seen corresponding path program 1 times [2020-10-27 00:43:56,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:43:56,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001177370] [2020-10-27 00:43:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:43:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:43:57,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:43:57,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:43:57,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 00:43:57,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:43:57,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 723 [2020-10-27 00:43:57,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:43:57,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:43:57,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:43:57,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 00:43:57,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:43:57,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:43:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:43:57,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:43:57,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:43:57,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:43:57,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:43:57,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 00:43:57,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:43:57,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:43:57,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:43:57,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:43:57,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:43:57,998 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 00:43:57,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001177370] [2020-10-27 00:43:58,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:43:58,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:43:58,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948128922] [2020-10-27 00:43:58,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:43:58,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:43:58,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:43:58,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:43:58,036 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 00:44:33,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:44:33,703 INFO L93 Difference]: Finished difference Result 5100 states and 9572 transitions. [2020-10-27 00:44:33,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:44:33,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-27 00:44:33,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:44:33,762 INFO L225 Difference]: With dead ends: 5100 [2020-10-27 00:44:33,763 INFO L226 Difference]: Without dead ends: 3255 [2020-10-27 00:44:33,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 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 00:44:33,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2020-10-27 00:44:34,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3209. [2020-10-27 00:44:34,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3209 states. [2020-10-27 00:44:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 5178 transitions. [2020-10-27 00:44:34,056 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 5178 transitions. Word has length 36 [2020-10-27 00:44:34,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:44:34,058 INFO L481 AbstractCegarLoop]: Abstraction has 3209 states and 5178 transitions. [2020-10-27 00:44:34,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:44:34,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 5178 transitions. [2020-10-27 00:44:34,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 00:44:34,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:44:34,070 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:44:34,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:44:34,072 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:44:34,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:44:34,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1200286052, now seen corresponding path program 1 times [2020-10-27 00:44:34,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:44:34,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791601937] [2020-10-27 00:44:34,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:44:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:44:34,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:34,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:34,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:35,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:44:35,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 00:44:35,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:44:35,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1700 [2020-10-27 00:44:35,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:44:35,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:44:35,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:44:35,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 00:44:35,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 00:44:35,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:44:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:44:36,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:36,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:44:36,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:44:36,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:44:36,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:44:36,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:44:36,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:44:36,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:44:36,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:44:36,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:44:36,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:44:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:44:36,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:36,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:36,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:44:36,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:44:36,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:44:36,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-27 00:44:36,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:44:36,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:44:36,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:44:36,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:44:36,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:44:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:44:36,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791601937] [2020-10-27 00:44:36,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:44:36,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:44:36,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071547860] [2020-10-27 00:44:36,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:44:36,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:44:36,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:44:36,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:44:36,757 INFO L87 Difference]: Start difference. First operand 3209 states and 5178 transitions. Second operand 8 states. [2020-10-27 00:45:41,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:45:41,348 INFO L93 Difference]: Finished difference Result 12196 states and 20019 transitions. [2020-10-27 00:45:41,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:45:41,351 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-10-27 00:45:41,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:45:41,409 INFO L225 Difference]: With dead ends: 12196 [2020-10-27 00:45:41,410 INFO L226 Difference]: Without dead ends: 8993 [2020-10-27 00:45:41,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:45:41,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8993 states. [2020-10-27 00:45:41,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8993 to 8982. [2020-10-27 00:45:41,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8982 states. [2020-10-27 00:45:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8982 states to 8982 states and 13405 transitions. [2020-10-27 00:45:41,786 INFO L78 Accepts]: Start accepts. Automaton has 8982 states and 13405 transitions. Word has length 111 [2020-10-27 00:45:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:45:41,787 INFO L481 AbstractCegarLoop]: Abstraction has 8982 states and 13405 transitions. [2020-10-27 00:45:41,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:45:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 8982 states and 13405 transitions. [2020-10-27 00:45:41,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-27 00:45:41,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:45:41,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:45:41,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:45:41,797 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:45:41,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:45:41,798 INFO L82 PathProgramCache]: Analyzing trace with hash 321839679, now seen corresponding path program 1 times [2020-10-27 00:45:41,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:45:41,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662158806] [2020-10-27 00:45:41,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:45:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:45:41,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:41,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:43,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:45:43,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-27 00:45:43,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:45:43,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1642 [2020-10-27 00:45:43,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:45:43,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:45:43,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:45:43,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-27 00:45:43,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:45:43,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:45:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:45:43,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:43,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:45:43,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:45:43,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:45:43,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 00:45:43,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:45:43,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:45:43,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:45:43,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:45:43,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:45:43,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:45:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:45:43,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:43,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:45:43,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-27 00:45:43,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:45:43,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-27 00:45:43,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:45:43,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:45:43,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:45:43,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-27 00:45:43,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:45:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:45:44,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662158806] [2020-10-27 00:45:44,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:45:44,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:45:44,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973492667] [2020-10-27 00:45:44,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:45:44,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:45:44,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:45:44,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:45:44,205 INFO L87 Difference]: Start difference. First operand 8982 states and 13405 transitions. Second operand 7 states. [2020-10-27 00:46:35,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:46:35,404 INFO L93 Difference]: Finished difference Result 27104 states and 41870 transitions. [2020-10-27 00:46:35,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:46:35,406 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 163 [2020-10-27 00:46:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:46:35,499 INFO L225 Difference]: With dead ends: 27104 [2020-10-27 00:46:35,499 INFO L226 Difference]: Without dead ends: 18128 [2020-10-27 00:46:35,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:46:35,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18128 states. [2020-10-27 00:46:35,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18128 to 17935. [2020-10-27 00:46:35,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17935 states. [2020-10-27 00:46:36,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17935 states to 17935 states and 24344 transitions. [2020-10-27 00:46:36,013 INFO L78 Accepts]: Start accepts. Automaton has 17935 states and 24344 transitions. Word has length 163 [2020-10-27 00:46:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:46:36,015 INFO L481 AbstractCegarLoop]: Abstraction has 17935 states and 24344 transitions. [2020-10-27 00:46:36,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:46:36,019 INFO L276 IsEmpty]: Start isEmpty. Operand 17935 states and 24344 transitions. [2020-10-27 00:46:36,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-27 00:46:36,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:46:36,029 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:46:36,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:46:36,030 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:46:36,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:46:36,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1806691244, now seen corresponding path program 1 times [2020-10-27 00:46:36,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:46:36,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012927146] [2020-10-27 00:46:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:46:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:46:36,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:36,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:36,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:36,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:38,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:41,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:46:41,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-27 00:46:41,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:46:41,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5098 [2020-10-27 00:46:41,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:46:41,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:46:41,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:46:41,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-27 00:46:41,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:46:41,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:46:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:46:41,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:41,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:46:41,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:46:41,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:46:41,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 00:46:41,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:46:41,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:46:41,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:46:41,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:46:41,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:46:41,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:46:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:46:41,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:41,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:41,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:46:41,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 00:46:41,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:46:41,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-27 00:46:41,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:46:41,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:46:41,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:46:41,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 00:46:41,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:46:41,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-27 00:46:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:46:41,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:41,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:46:41,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 00:46:41,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:46:41,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 00:46:41,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:46:41,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:46:41,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-27 00:46:41,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:46:41,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:46:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 56 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:46:42,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012927146] [2020-10-27 00:46:42,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:46:42,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:46:42,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068844172] [2020-10-27 00:46:42,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:46:42,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:46:42,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:46:42,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:46:42,018 INFO L87 Difference]: Start difference. First operand 17935 states and 24344 transitions. Second operand 7 states. [2020-10-27 00:46:42,164 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 68