/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:18:54,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:18:54,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:18:54,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:18:54,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:18:54,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:18:54,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:18:54,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:18:54,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:18:54,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:18:54,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:18:54,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:18:54,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:18:54,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:18:54,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:18:54,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:18:54,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:18:54,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:18:54,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:18:54,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:18:54,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:18:54,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:18:54,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:18:54,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:18:54,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:18:54,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:18:54,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:18:54,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:18:54,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:18:54,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:18:54,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:18:54,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:18:54,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:18:54,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:18:54,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:18:54,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:18:54,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:18:54,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:18:54,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:18:54,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:18:54,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:18:54,186 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 15:18:54,236 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:18:54,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:18:54,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:18:54,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:18:54,241 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:18:54,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:18:54,242 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:18:54,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:18:54,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:18:54,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:18:54,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:18:54,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:18:54,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:18:54,244 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:18:54,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:18:54,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:18:54,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:18:54,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:18:54,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:18:54,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:18:54,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:18:54,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:18:54,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:18:54,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:18:54,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:18:54,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:18:54,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:18:54,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:18:54,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:18:54,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:18:54,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:18:54,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:18:54,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:18:54,739 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:18:54,740 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:18:54,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2020-10-28 15:18:54,839 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71adfcc88/15e805f4eca44f9f80136840a5ce242b/FLAGca64d6d21 [2020-10-28 15:18:55,444 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:18:55,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-2.i [2020-10-28 15:18:55,452 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71adfcc88/15e805f4eca44f9f80136840a5ce242b/FLAGca64d6d21 [2020-10-28 15:18:55,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71adfcc88/15e805f4eca44f9f80136840a5ce242b [2020-10-28 15:18:55,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:18:55,826 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:18:55,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:18:55,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:18:55,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:18:55,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:18:55" (1/1) ... [2020-10-28 15:18:55,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a49b8cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:55, skipping insertion in model container [2020-10-28 15:18:55,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:18:55" (1/1) ... [2020-10-28 15:18:55,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:18:55,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:18:56,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:18:56,043 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:18:56,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:18:56,080 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:18:56,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:56 WrapperNode [2020-10-28 15:18:56,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:18:56,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:18:56,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:18:56,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:18:56,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:56" (1/1) ... [2020-10-28 15:18:56,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:56" (1/1) ... [2020-10-28 15:18:56,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:56" (1/1) ... [2020-10-28 15:18:56,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:56" (1/1) ... [2020-10-28 15:18:56,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:56" (1/1) ... [2020-10-28 15:18:56,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:56" (1/1) ... [2020-10-28 15:18:56,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:56" (1/1) ... [2020-10-28 15:18:56,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:18:56,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:18:56,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:18:56,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:18:56,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:18:56,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:18:56,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:18:56,213 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:18:56,213 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:18:56,213 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:18:56,213 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:18:56,214 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:18:56,214 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 15:18:56,214 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 15:18:56,214 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:18:56,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:18:56,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:18:56,215 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:18:56,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:18:56,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:18:56,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:18:56,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:18:56,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:18:56,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:18:56,513 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:18:56,513 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 15:18:56,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:18:56 BoogieIcfgContainer [2020-10-28 15:18:56,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:18:56,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:18:56,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:18:56,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:18:56,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:18:55" (1/3) ... [2020-10-28 15:18:56,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7951b5f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:18:56, skipping insertion in model container [2020-10-28 15:18:56,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:56" (2/3) ... [2020-10-28 15:18:56,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7951b5f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:18:56, skipping insertion in model container [2020-10-28 15:18:56,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:18:56" (3/3) ... [2020-10-28 15:18:56,527 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2020-10-28 15:18:56,543 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:18:56,550 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:18:56,597 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:18:56,665 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:18:56,666 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:18:56,666 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:18:56,666 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:18:56,666 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:18:56,667 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:18:56,667 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:18:56,667 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:18:56,689 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-28 15:18:56,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 15:18:56,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:56,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:56,697 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:56,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:56,706 INFO L82 PathProgramCache]: Analyzing trace with hash 596948892, now seen corresponding path program 1 times [2020-10-28 15:18:56,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:56,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480386277] [2020-10-28 15:18:56,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:56,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:56,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:56,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:57,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:57,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:18:57,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:18:57,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-10-28 15:18:57,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:57,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:57,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:57,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:18:57,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:57,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-28 15:18:57,405 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-10-28 15:18:57,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:57,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:57,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:57,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:57,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:57,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 15:18:57,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:57,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:57,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:57,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:57,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:57,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:18:57,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480386277] [2020-10-28 15:18:57,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:18:57,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:18:57,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713501490] [2020-10-28 15:18:57,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:18:57,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:57,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:18:57,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:18:57,523 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-28 15:18:57,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:57,598 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-10-28 15:18:57,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:18:57,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-28 15:18:57,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:57,608 INFO L225 Difference]: With dead ends: 37 [2020-10-28 15:18:57,609 INFO L226 Difference]: Without dead ends: 15 [2020-10-28 15:18:57,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:18:57,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-28 15:18:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-28 15:18:57,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-28 15:18:57,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-28 15:18:57,653 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-28 15:18:57,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:57,654 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-28 15:18:57,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:18:57,654 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-28 15:18:57,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 15:18:57,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:57,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:57,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:18:57,656 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:57,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:57,657 INFO L82 PathProgramCache]: Analyzing trace with hash -433105898, now seen corresponding path program 1 times [2020-10-28 15:18:57,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:57,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546684608] [2020-10-28 15:18:57,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:57,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:57,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:57,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:57,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:18:57,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:18:57,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-28 15:18:57,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:57,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:57,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:18:57,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:18:57,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:18:57,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:58,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:58,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:58,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:58,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:58,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:58,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 15:18:58,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:58,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:58,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:58,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:58,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:58,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:18:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:18:58,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546684608] [2020-10-28 15:18:58,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:18:58,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:18:58,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237924229] [2020-10-28 15:18:58,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:18:58,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:58,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:18:58,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:18:58,073 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2020-10-28 15:18:58,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:58,145 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-28 15:18:58,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:18:58,146 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-28 15:18:58,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:58,147 INFO L225 Difference]: With dead ends: 24 [2020-10-28 15:18:58,147 INFO L226 Difference]: Without dead ends: 17 [2020-10-28 15:18:58,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:18:58,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-28 15:18:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-28 15:18:58,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 15:18:58,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-28 15:18:58,156 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-10-28 15:18:58,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:58,157 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-28 15:18:58,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:18:58,157 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-28 15:18:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 15:18:58,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:58,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:58,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:18:58,159 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:58,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:58,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1176580852, now seen corresponding path program 1 times [2020-10-28 15:18:58,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:58,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967477773] [2020-10-28 15:18:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:58,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:58,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:58,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 15:18:58,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:58,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 15:18:58,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:58,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:58,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:18:58,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:18:58,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 15:18:58,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:58,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:58,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:58,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:58,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:58,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:58,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:18:58,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:58,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:58,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:58,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:58,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:58,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:18:58,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967477773] [2020-10-28 15:18:58,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:58,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:18:58,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681476271] [2020-10-28 15:18:58,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:18:58,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:58,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:18:58,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:18:58,290 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2020-10-28 15:18:58,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:58,400 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-28 15:18:58,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:18:58,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-28 15:18:58,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:58,402 INFO L225 Difference]: With dead ends: 26 [2020-10-28 15:18:58,402 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 15:18:58,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:18:58,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 15:18:58,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-28 15:18:58,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-28 15:18:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-28 15:18:58,411 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2020-10-28 15:18:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:58,411 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-28 15:18:58,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:18:58,412 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-28 15:18:58,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 15:18:58,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:58,413 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:58,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:18:58,413 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:58,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:58,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1897321042, now seen corresponding path program 2 times [2020-10-28 15:18:58,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:58,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963771075] [2020-10-28 15:18:58,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:58,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:58,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:58,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 15:18:58,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:58,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-28 15:18:58,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:58,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:58,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:18:58,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:18:58,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:18:58,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:58,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:58,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:58,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:58,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:58,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:58,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:18:58,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:58,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:58,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:58,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:58,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:58,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:18:58,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963771075] [2020-10-28 15:18:58,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:58,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:18:58,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398759108] [2020-10-28 15:18:58,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:18:58,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:58,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:18:58,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:18:58,609 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2020-10-28 15:18:58,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:58,752 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-28 15:18:58,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:18:58,753 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-28 15:18:58,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:58,753 INFO L225 Difference]: With dead ends: 28 [2020-10-28 15:18:58,754 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 15:18:58,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:18:58,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 15:18:58,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-28 15:18:58,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 15:18:58,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-28 15:18:58,762 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-10-28 15:18:58,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:58,762 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-28 15:18:58,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:18:58,762 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-28 15:18:58,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:18:58,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:58,763 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:58,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:18:58,764 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:58,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:58,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1256058320, now seen corresponding path program 3 times [2020-10-28 15:18:58,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:58,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379036141] [2020-10-28 15:18:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:58,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:58,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:58,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:18:58,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:58,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-28 15:18:58,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:58,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:58,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:18:58,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:18:58,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:18:58,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:58,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:58,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:58,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:58,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:58,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:58,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:18:58,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:58,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:58,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:58,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:58,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:58,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:58,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:18:58,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379036141] [2020-10-28 15:18:58,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:58,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:18:58,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964190429] [2020-10-28 15:18:58,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:18:58,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:58,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:18:58,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:18:58,936 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-10-28 15:18:59,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:59,148 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-28 15:18:59,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:18:59,148 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-28 15:18:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:59,149 INFO L225 Difference]: With dead ends: 30 [2020-10-28 15:18:59,149 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 15:18:59,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:18:59,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 15:18:59,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-28 15:18:59,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 15:18:59,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-28 15:18:59,157 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2020-10-28 15:18:59,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:59,157 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-28 15:18:59,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:18:59,157 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-28 15:18:59,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:18:59,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:59,158 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:59,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:18:59,159 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:59,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:59,159 INFO L82 PathProgramCache]: Analyzing trace with hash 593285774, now seen corresponding path program 4 times [2020-10-28 15:18:59,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:59,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924199552] [2020-10-28 15:18:59,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:59,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:59,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:59,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:18:59,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:59,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-28 15:18:59,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:59,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:59,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:18:59,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:18:59,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:18:59,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:59,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:59,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:59,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:59,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:59,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:59,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:18:59,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:59,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:59,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:59,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:59,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:59,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:18:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:18:59,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924199552] [2020-10-28 15:18:59,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:59,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:18:59,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730865675] [2020-10-28 15:18:59,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:18:59,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:59,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:18:59,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:18:59,431 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 8 states. [2020-10-28 15:18:59,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:59,678 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-28 15:18:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:18:59,679 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-28 15:18:59,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:59,680 INFO L225 Difference]: With dead ends: 32 [2020-10-28 15:18:59,680 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 15:18:59,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:18:59,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 15:18:59,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-28 15:18:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 15:18:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-28 15:18:59,693 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2020-10-28 15:18:59,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:59,693 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-28 15:18:59,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:18:59,693 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-28 15:18:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:18:59,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:59,694 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:59,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:18:59,695 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:59,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:59,698 INFO L82 PathProgramCache]: Analyzing trace with hash -303500436, now seen corresponding path program 5 times [2020-10-28 15:18:59,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:59,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259371000] [2020-10-28 15:18:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:59,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:59,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:59,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:18:59,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:59,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-28 15:18:59,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:59,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:59,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:18:59,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:18:59,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:18:59,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:59,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:59,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:59,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:59,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:59,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:59,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:18:59,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:59,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:59,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:59,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:59,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:59,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:18:59,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259371000] [2020-10-28 15:18:59,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:59,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:18:59,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492055429] [2020-10-28 15:18:59,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:18:59,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:59,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:18:59,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:18:59,991 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 9 states. [2020-10-28 15:19:00,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:00,262 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-28 15:19:00,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:19:00,262 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-28 15:19:00,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:00,263 INFO L225 Difference]: With dead ends: 34 [2020-10-28 15:19:00,264 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 15:19:00,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:19:00,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 15:19:00,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-28 15:19:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 15:19:00,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-28 15:19:00,271 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2020-10-28 15:19:00,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:00,271 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-28 15:19:00,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:19:00,271 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-28 15:19:00,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:19:00,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:00,272 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:00,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:19:00,273 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:00,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:00,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1173378250, now seen corresponding path program 6 times [2020-10-28 15:19:00,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:00,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44681876] [2020-10-28 15:19:00,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:00,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:00,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:00,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:19:00,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:00,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-28 15:19:00,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:00,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:00,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:19:00,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:19:00,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:19:00,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:00,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:00,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:00,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:00,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:00,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:00,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:19:00,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:00,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:00,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:00,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:00,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:00,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:19:00,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44681876] [2020-10-28 15:19:00,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:19:00,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:19:00,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037882256] [2020-10-28 15:19:00,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:19:00,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:00,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:19:00,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:19:00,509 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 10 states. [2020-10-28 15:19:00,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:00,814 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-28 15:19:00,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:19:00,815 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-28 15:19:00,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:00,816 INFO L225 Difference]: With dead ends: 36 [2020-10-28 15:19:00,816 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 15:19:00,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:19:00,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 15:19:00,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-28 15:19:00,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 15:19:00,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-28 15:19:00,823 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2020-10-28 15:19:00,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:00,823 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-28 15:19:00,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:19:00,824 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-28 15:19:00,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:19:00,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:00,824 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:00,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:19:00,825 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:00,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:00,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1180379480, now seen corresponding path program 7 times [2020-10-28 15:19:00,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:00,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927690950] [2020-10-28 15:19:00,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:00,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:00,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:00,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:19:00,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:00,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-28 15:19:00,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:00,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:00,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:19:00,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:19:00,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:19:00,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:01,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:01,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:01,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:01,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:01,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:01,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:19:01,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:01,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:01,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:01,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:01,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:01,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:19:01,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927690950] [2020-10-28 15:19:01,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:19:01,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:19:01,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000117321] [2020-10-28 15:19:01,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:19:01,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:01,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:19:01,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:19:01,132 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 11 states. [2020-10-28 15:19:01,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:01,502 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-28 15:19:01,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:19:01,503 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-28 15:19:01,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:01,503 INFO L225 Difference]: With dead ends: 37 [2020-10-28 15:19:01,503 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 15:19:01,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:19:01,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 15:19:01,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 15:19:01,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 15:19:01,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-28 15:19:01,513 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2020-10-28 15:19:01,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:01,514 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-28 15:19:01,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:19:01,514 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-28 15:19:01,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:19:01,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:01,515 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:01,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:19:01,515 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:01,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:01,516 INFO L82 PathProgramCache]: Analyzing trace with hash 306206982, now seen corresponding path program 8 times [2020-10-28 15:19:01,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:01,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132046760] [2020-10-28 15:19:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:01,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:01,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:01,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:19:01,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:01,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-28 15:19:01,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:01,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:01,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:19:01,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:19:01,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:19:01,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:01,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:01,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:01,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:01,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:01,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:01,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:19:01,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:01,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:01,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:01,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:01,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:01,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:19:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:19:01,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132046760] [2020-10-28 15:19:01,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:19:01,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:19:01,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180506297] [2020-10-28 15:19:01,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:19:01,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:01,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:19:01,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:19:01,968 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 14 states. [2020-10-28 15:19:02,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:02,696 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-28 15:19:02,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:19:02,697 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-28 15:19:02,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:02,697 INFO L225 Difference]: With dead ends: 39 [2020-10-28 15:19:02,698 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 15:19:02,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:19:02,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 15:19:02,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-28 15:19:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 15:19:02,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-28 15:19:02,705 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2020-10-28 15:19:02,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:02,705 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-28 15:19:02,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:19:02,706 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-28 15:19:02,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:19:02,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:02,707 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:02,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:19:02,707 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:02,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:02,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1308312604, now seen corresponding path program 9 times [2020-10-28 15:19:02,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:02,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855854627] [2020-10-28 15:19:02,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:02,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:02,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:02,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:19:02,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:02,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-28 15:19:02,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:02,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:02,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:19:02,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:19:02,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:19:02,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:03,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:03,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:03,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:03,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:03,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:03,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:19:03,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:03,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:03,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:03,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:03,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:03,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 17 [2020-10-28 15:19:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:19:03,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855854627] [2020-10-28 15:19:03,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:19:03,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-28 15:19:03,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539785022] [2020-10-28 15:19:03,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:19:03,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:03,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:19:03,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:19:03,040 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 12 states. [2020-10-28 15:19:03,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:03,405 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-28 15:19:03,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:19:03,406 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-28 15:19:03,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:03,406 INFO L225 Difference]: With dead ends: 32 [2020-10-28 15:19:03,406 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 15:19:03,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:19:03,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 15:19:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 15:19:03,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 15:19:03,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 15:19:03,408 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-10-28 15:19:03,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:03,408 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 15:19:03,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:19:03,408 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 15:19:03,409 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 15:19:03,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:19:03,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 15:19:03,891 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-10-28 15:19:03,895 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-28 15:19:03,896 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-28 15:19:03,896 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-28 15:19:03,896 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-28 15:19:03,896 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-28 15:19:03,896 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 15:19:03,897 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-10-28 15:19:03,897 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 15:19:03,897 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 15:19:03,897 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 15:19:03,897 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 15:19:03,897 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 15:19:03,897 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 22 28) the Hoare annotation is: true [2020-10-28 15:19:03,898 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 22 28) no Hoare annotation was computed. [2020-10-28 15:19:03,898 INFO L274 CegarLoopResult]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2020-10-28 15:19:03,898 INFO L270 CegarLoopResult]: At program point L24-3(lines 24 26) the Hoare annotation is: (or (and (<= main_~i~0 4) (<= 6 main_~sn~0) (<= 4 main_~i~0) (<= main_~sn~0 6)) (and (<= 0 main_~sn~0) (<= 1 main_~i~0) (<= main_~sn~0 0) (<= main_~i~0 1)) (and (<= 7 main_~i~0) (<= main_~i~0 7) (<= 12 main_~sn~0) (<= main_~sn~0 12)) (and (<= main_~sn~0 4) (<= 3 main_~i~0) (<= main_~i~0 3) (<= 4 main_~sn~0)) (and (<= 9 main_~i~0) (<= main_~sn~0 16) (< 15 main_~sn~0)) (and (<= main_~i~0 6) (<= 10 main_~sn~0) (<= main_~sn~0 10) (<= 6 main_~i~0)) (and (<= 2 main_~i~0) (<= main_~sn~0 2) (<= 2 main_~sn~0) (<= main_~i~0 2)) (and (<= main_~sn~0 8) (<= 5 main_~i~0) (<= main_~i~0 5) (<= 8 main_~sn~0)) (and (<= main_~i~0 8) (<= 8 main_~i~0) (<= main_~sn~0 14) (<= 14 main_~sn~0))) [2020-10-28 15:19:03,898 INFO L270 CegarLoopResult]: At program point L24-4(lines 24 26) the Hoare annotation is: (and (<= main_~sn~0 16) (< 15 main_~sn~0)) [2020-10-28 15:19:03,898 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 22 28) no Hoare annotation was computed. [2020-10-28 15:19:03,899 INFO L270 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-28 15:19:03,899 INFO L274 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-10-28 15:19:03,899 INFO L274 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-10-28 15:19:03,899 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2020-10-28 15:19:03,899 INFO L274 CegarLoopResult]: For program point L15-2(lines 14 19) no Hoare annotation was computed. [2020-10-28 15:19:03,899 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 14 19) no Hoare annotation was computed. [2020-10-28 15:19:03,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 03:19:03 BoogieIcfgContainer [2020-10-28 15:19:03,921 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 15:19:03,924 INFO L168 Benchmark]: Toolchain (without parser) took 8102.71 ms. Allocated memory was 153.1 MB in the beginning and 226.5 MB in the end (delta: 73.4 MB). Free memory was 129.3 MB in the beginning and 104.3 MB in the end (delta: 25.0 MB). Peak memory consumption was 99.2 MB. Max. memory is 8.0 GB. [2020-10-28 15:19:03,924 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 153.1 MB. Free memory is still 125.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 15:19:03,925 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.85 ms. Allocated memory is still 153.1 MB. Free memory was 128.5 MB in the beginning and 119.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 15:19:03,926 INFO L168 Benchmark]: Boogie Preprocessor took 39.44 ms. Allocated memory is still 153.1 MB. Free memory was 119.3 MB in the beginning and 118.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 15:19:03,926 INFO L168 Benchmark]: RCFGBuilder took 392.93 ms. Allocated memory is still 153.1 MB. Free memory was 118.0 MB in the beginning and 105.4 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-28 15:19:03,927 INFO L168 Benchmark]: TraceAbstraction took 7403.81 ms. Allocated memory was 153.1 MB in the beginning and 226.5 MB in the end (delta: 73.4 MB). Free memory was 104.9 MB in the beginning and 104.3 MB in the end (delta: 635.0 kB). Peak memory consumption was 75.1 MB. Max. memory is 8.0 GB. [2020-10-28 15:19:03,931 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 153.1 MB. Free memory is still 125.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 249.85 ms. Allocated memory is still 153.1 MB. Free memory was 128.5 MB in the beginning and 119.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.44 ms. Allocated memory is still 153.1 MB. Free memory was 119.3 MB in the beginning and 118.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 392.93 ms. Allocated memory is still 153.1 MB. Free memory was 118.0 MB in the beginning and 105.4 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7403.81 ms. Allocated memory was 153.1 MB in the beginning and 226.5 MB in the end (delta: 73.4 MB). Free memory was 104.9 MB in the beginning and 104.3 MB in the end (delta: 635.0 kB). Peak memory consumption was 75.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: ((((((((((i <= 4 && 6 <= sn) && 4 <= i) && sn <= 6) || (((0 <= sn && 1 <= i) && sn <= 0) && i <= 1)) || (((7 <= i && i <= 7) && 12 <= sn) && sn <= 12)) || (((sn <= 4 && 3 <= i) && i <= 3) && 4 <= sn)) || ((9 <= i && sn <= 16) && 15 < sn)) || (((i <= 6 && 10 <= sn) && sn <= 10) && 6 <= i)) || (((2 <= i && sn <= 2) && 2 <= sn) && i <= 2)) || (((sn <= 8 && 5 <= i) && i <= 5) && 8 <= sn)) || (((i <= 8 && 8 <= i) && sn <= 14) && 14 <= sn) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.7s, OverallIterations: 11, TraceHistogramMax: 9, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 139 SDtfs, 167 SDslu, 270 SDs, 0 SdLazy, 589 SolverSat, 89 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 7 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 39 PreInvPairs, 49 NumberOfFragments, 155 HoareAnnotationTreeSize, 39 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 296 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 233 NumberOfCodeBlocks, 233 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 222 ConstructedInterpolants, 0 QuantifiedInterpolants, 17192 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 81/285 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...