/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 19:44:42,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:44:42,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:44:42,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:44:42,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:44:42,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:44:42,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:44:42,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:44:42,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:44:42,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:44:42,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:44:42,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:44:42,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:44:42,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:44:42,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:44:42,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:44:42,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:44:42,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:44:42,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:44:42,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:44:42,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:44:42,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:44:42,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:44:42,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:44:42,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 19:44:42,149 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 19:44:42,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 19:44:42,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 19:44:42,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 19:44:42,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 19:44:42,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 19:44:42,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 19:44:42,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 19:44:42,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 19:44:42,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 19:44:42,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 19:44:42,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 19:44:42,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 19:44:42,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:44:42,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:44:42,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:44:42,168 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 [2020-08-21 19:44:42,201 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:44:42,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:44:42,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:44:42,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:44:42,203 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:44:42,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:44:42,203 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:44:42,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:44:42,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:44:42,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:44:42,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:44:42,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:44:42,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:44:42,205 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:44:42,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:44:42,205 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:44:42,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:44:42,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:44:42,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:44:42,206 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:44:42,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:44:42,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:44:42,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:44:42,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:44:42,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:44:42,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:44:42,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:44:42,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:44:42,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:44:42,208 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-08-21 19:44:42,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:44:42,568 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:44:42,571 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:44:42,572 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:44:42,573 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:44:42,573 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-08-21 19:44:42,636 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0ff63f24/5c620f26f7ed4dce8ad2b78f0c4f6242/FLAGbf43e157a [2020-08-21 19:44:43,133 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:44:43,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-08-21 19:44:43,142 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0ff63f24/5c620f26f7ed4dce8ad2b78f0c4f6242/FLAGbf43e157a [2020-08-21 19:44:43,502 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0ff63f24/5c620f26f7ed4dce8ad2b78f0c4f6242 [2020-08-21 19:44:43,511 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:44:43,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:44:43,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:44:43,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:44:43,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:44:43,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:44:43" (1/1) ... [2020-08-21 19:44:43,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@243023c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:43, skipping insertion in model container [2020-08-21 19:44:43,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:44:43" (1/1) ... [2020-08-21 19:44:43,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:44:43,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:44:43,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:44:43,734 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:44:43,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:44:43,768 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:44:43,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:43 WrapperNode [2020-08-21 19:44:43,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:44:43,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:44:43,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:44:43,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:44:43,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:43" (1/1) ... [2020-08-21 19:44:43,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:43" (1/1) ... [2020-08-21 19:44:43,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:43" (1/1) ... [2020-08-21 19:44:43,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:43" (1/1) ... [2020-08-21 19:44:43,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:43" (1/1) ... [2020-08-21 19:44:43,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:43" (1/1) ... [2020-08-21 19:44:43,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:43" (1/1) ... [2020-08-21 19:44:43,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:44:43,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:44:43,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:44:43,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:44:43,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:43" (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 [2020-08-21 19:44:43,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:44:43,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:44:43,943 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 19:44:43,943 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-21 19:44:43,943 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:44:43,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 19:44:43,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:44:43,944 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 19:44:43,945 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-21 19:44:43,945 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:44:43,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:44:43,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:44:44,131 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:44:44,132 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 19:44:44,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:44:44 BoogieIcfgContainer [2020-08-21 19:44:44,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:44:44,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:44:44,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:44:44,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:44:44,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:44:43" (1/3) ... [2020-08-21 19:44:44,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2ce726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:44:44, skipping insertion in model container [2020-08-21 19:44:44,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:44:43" (2/3) ... [2020-08-21 19:44:44,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2ce726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:44:44, skipping insertion in model container [2020-08-21 19:44:44,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:44:44" (3/3) ... [2020-08-21 19:44:44,145 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-08-21 19:44:44,157 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:44:44,170 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:44:44,187 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:44:44,222 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:44:44,222 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:44:44,222 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:44:44,222 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:44:44,222 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:44:44,223 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:44:44,223 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:44:44,223 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:44:44,259 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-21 19:44:44,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 19:44:44,274 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:44,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:44,276 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:44,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:44,283 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-21 19:44:44,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:44,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71909804] [2020-08-21 19:44:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:44:44,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71909804] [2020-08-21 19:44:44,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:44:44,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:44:44,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798732158] [2020-08-21 19:44:44,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:44:44,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:44,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:44:44,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:44:44,632 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-21 19:44:44,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:44,687 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-21 19:44:44,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:44:44,689 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 19:44:44,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:44,698 INFO L225 Difference]: With dead ends: 40 [2020-08-21 19:44:44,698 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 19:44:44,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:44:44,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 19:44:44,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-21 19:44:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 19:44:44,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-21 19:44:44,745 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-21 19:44:44,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:44,745 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-21 19:44:44,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:44:44,746 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-21 19:44:44,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 19:44:44,747 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:44,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:44,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:44:44,749 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:44,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:44,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-21 19:44:44,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:44,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882402607] [2020-08-21 19:44:44,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:44:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:44:44,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882402607] [2020-08-21 19:44:44,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:44:44,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:44:44,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742855395] [2020-08-21 19:44:44,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:44:44,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:44,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:44:44,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:44:44,907 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-21 19:44:44,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:44,927 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-21 19:44:44,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:44:44,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-21 19:44:44,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:44,929 INFO L225 Difference]: With dead ends: 32 [2020-08-21 19:44:44,929 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 19:44:44,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:44:44,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 19:44:44,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-21 19:44:44,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 19:44:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-21 19:44:44,939 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-21 19:44:44,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:44,939 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-21 19:44:44,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:44:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-21 19:44:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 19:44:44,941 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:44,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:44,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:44:44,942 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:44,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:44,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-21 19:44:44,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:44,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674833868] [2020-08-21 19:44:44,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:45,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:45,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:45,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:44:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:44:45,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674833868] [2020-08-21 19:44:45,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:44:45,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 19:44:45,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473357316] [2020-08-21 19:44:45,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 19:44:45,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:45,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 19:44:45,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 19:44:45,148 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-21 19:44:45,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:45,222 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-21 19:44:45,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 19:44:45,223 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-21 19:44:45,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:45,225 INFO L225 Difference]: With dead ends: 48 [2020-08-21 19:44:45,225 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 19:44:45,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 19:44:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 19:44:45,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 19:44:45,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 19:44:45,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-21 19:44:45,234 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-21 19:44:45,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:45,235 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-21 19:44:45,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 19:44:45,235 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-21 19:44:45,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 19:44:45,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:45,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:45,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:44:45,238 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:45,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:45,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-21 19:44:45,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:45,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227427743] [2020-08-21 19:44:45,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:45,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:44:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:45,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:44:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:45,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:44:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:45,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:44:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:44:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 19:44:45,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227427743] [2020-08-21 19:44:45,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:44:45,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:44:45,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745535540] [2020-08-21 19:44:45,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:44:45,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:44:45,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:44:45,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:44:45,405 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-21 19:44:45,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:44:45,429 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-21 19:44:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:44:45,430 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-21 19:44:45,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:44:45,431 INFO L225 Difference]: With dead ends: 50 [2020-08-21 19:44:45,431 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 19:44:45,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:44:45,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 19:44:45,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-21 19:44:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 19:44:45,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-21 19:44:45,440 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-21 19:44:45,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:44:45,440 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-21 19:44:45,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:44:45,441 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-21 19:44:45,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 19:44:45,442 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:44:45,442 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:44:45,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 19:44:45,443 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:44:45,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:44:45,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-21 19:44:45,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:44:45,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970528846] [2020-08-21 19:44:45,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:44:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 19:44:45,459 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 19:44:45,460 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 19:44:45,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 19:44:45,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:44:45 BoogieIcfgContainer [2020-08-21 19:44:45,492 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 19:44:45,495 INFO L168 Benchmark]: Toolchain (without parser) took 1980.88 ms. Allocated memory was 140.5 MB in the beginning and 234.9 MB in the end (delta: 94.4 MB). Free memory was 103.8 MB in the beginning and 199.8 MB in the end (delta: -96.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 19:44:45,497 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 19:44:45,499 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.86 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 93.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-21 19:44:45,501 INFO L168 Benchmark]: Boogie Preprocessor took 117.85 ms. Allocated memory was 140.5 MB in the beginning and 201.3 MB in the end (delta: 60.8 MB). Free memory was 93.5 MB in the beginning and 180.4 MB in the end (delta: -86.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 19:44:45,506 INFO L168 Benchmark]: RCFGBuilder took 248.72 ms. Allocated memory is still 201.3 MB. Free memory was 180.4 MB in the beginning and 167.6 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-21 19:44:45,508 INFO L168 Benchmark]: TraceAbstraction took 1354.11 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 166.9 MB in the beginning and 199.8 MB in the end (delta: -32.8 MB). Peak memory consumption was 705.2 kB. Max. memory is 7.1 GB. [2020-08-21 19:44:45,520 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.86 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 93.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.85 ms. Allocated memory was 140.5 MB in the beginning and 201.3 MB in the end (delta: 60.8 MB). Free memory was 93.5 MB in the beginning and 180.4 MB in the end (delta: -86.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 248.72 ms. Allocated memory is still 201.3 MB. Free memory was 180.4 MB in the beginning and 167.6 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1354.11 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 166.9 MB in the beginning and 199.8 MB in the end (delta: -32.8 MB). Peak memory consumption was 705.2 kB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 25]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] unsigned int input = __VERIFIER_nondet_uint(); [L23] CALL, EXPR id(input) [L8] COND FALSE !(x==0) [L9] CALL, EXPR id2(x-1) [L15] COND FALSE !(x==0) [L16] CALL, EXPR id(x-1) [L8] COND TRUE x==0 [L8] return 0; [L16] RET, EXPR id(x-1) [L16] unsigned int ret = id(x-1) + 1; [L17] COND FALSE !(ret > 3) [L18] return ret; [L9] RET, EXPR id2(x-1) [L9] unsigned int ret = id2(x-1) + 1; [L10] COND FALSE !(ret > 3) [L11] return ret; [L23] RET, EXPR id(input) [L23] unsigned int result = id(input); [L24] COND TRUE result == 2 [L25] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 117 SDtfs, 6 SDslu, 405 SDs, 0 SdLazy, 57 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=4, 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, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 4036 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 4/4 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 incorrect! Received shutdown request...