/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --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 [2020-08-22 06:16:07,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 06:16:07,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 06:16:07,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 06:16:07,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 06:16:07,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 06:16:07,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 06:16:07,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 06:16:07,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 06:16:07,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 06:16:07,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 06:16:07,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 06:16:07,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 06:16:07,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 06:16:07,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 06:16:07,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 06:16:07,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 06:16:07,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 06:16:07,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 06:16:07,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 06:16:07,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 06:16:07,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 06:16:07,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 06:16:07,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 06:16:07,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 06:16:07,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 06:16:07,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 06:16:07,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 06:16:07,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 06:16:07,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 06:16:07,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 06:16:07,217 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 06:16:07,218 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 06:16:07,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 06:16:07,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 06:16:07,220 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 06:16:07,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 06:16:07,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 06:16:07,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 06:16:07,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 06:16:07,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 06:16:07,224 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 [2020-08-22 06:16:07,247 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 06:16:07,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 06:16:07,249 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 06:16:07,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 06:16:07,249 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 06:16:07,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 06:16:07,250 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 06:16:07,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 06:16:07,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 06:16:07,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 06:16:07,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 06:16:07,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 06:16:07,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 06:16:07,251 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 06:16:07,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 06:16:07,252 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 06:16:07,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 06:16:07,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 06:16:07,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 06:16:07,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 06:16:07,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 06:16:07,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 06:16:07,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 06:16:07,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 06:16:07,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 06:16:07,254 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 06:16:07,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 06:16:07,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 06:16:07,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 06:16:07,254 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=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-08-22 06:16:07,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 06:16:07,599 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 06:16:07,602 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 06:16:07,604 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 06:16:07,604 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 06:16:07,605 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-08-22 06:16:07,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18935bbb2/28f41387bc5c4990b78d6d96dfee7cdc/FLAG509a7e793 [2020-08-22 06:16:08,135 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 06:16:08,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-08-22 06:16:08,150 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18935bbb2/28f41387bc5c4990b78d6d96dfee7cdc/FLAG509a7e793 [2020-08-22 06:16:08,568 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18935bbb2/28f41387bc5c4990b78d6d96dfee7cdc [2020-08-22 06:16:08,578 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 06:16:08,580 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 06:16:08,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 06:16:08,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 06:16:08,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 06:16:08,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:16:08" (1/1) ... [2020-08-22 06:16:08,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bf15244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:08, skipping insertion in model container [2020-08-22 06:16:08,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:16:08" (1/1) ... [2020-08-22 06:16:08,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 06:16:08,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 06:16:08,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:16:08,818 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 06:16:08,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:16:08,857 INFO L208 MainTranslator]: Completed translation [2020-08-22 06:16:08,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:08 WrapperNode [2020-08-22 06:16:08,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 06:16:08,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 06:16:08,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 06:16:08,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 06:16:08,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:08" (1/1) ... [2020-08-22 06:16:08,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:08" (1/1) ... [2020-08-22 06:16:08,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:08" (1/1) ... [2020-08-22 06:16:08,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:08" (1/1) ... [2020-08-22 06:16:09,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:08" (1/1) ... [2020-08-22 06:16:09,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:08" (1/1) ... [2020-08-22 06:16:09,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:08" (1/1) ... [2020-08-22 06:16:09,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 06:16:09,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 06:16:09,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 06:16:09,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 06:16:09,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:08" (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 [2020-08-22 06:16:09,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 06:16:09,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 06:16:09,139 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 06:16:09,139 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-22 06:16:09,140 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 06:16:09,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 06:16:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 06:16:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 06:16:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-22 06:16:09,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 06:16:09,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 06:16:09,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 06:16:09,359 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 06:16:09,360 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 06:16:09,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:16:09 BoogieIcfgContainer [2020-08-22 06:16:09,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 06:16:09,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 06:16:09,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 06:16:09,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 06:16:09,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:16:08" (1/3) ... [2020-08-22 06:16:09,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@395e2065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:16:09, skipping insertion in model container [2020-08-22 06:16:09,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:08" (2/3) ... [2020-08-22 06:16:09,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@395e2065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:16:09, skipping insertion in model container [2020-08-22 06:16:09,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:16:09" (3/3) ... [2020-08-22 06:16:09,399 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-08-22 06:16:09,427 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 06:16:09,444 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 06:16:09,472 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 06:16:09,496 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 06:16:09,496 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 06:16:09,496 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 06:16:09,497 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 06:16:09,497 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 06:16:09,497 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 06:16:09,497 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 06:16:09,497 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 06:16:09,513 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-22 06:16:09,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 06:16:09,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:09,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:16:09,521 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:09,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:09,528 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-22 06:16:09,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:09,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089715868] [2020-08-22 06:16:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:09,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:09,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:16:09,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089715868] [2020-08-22 06:16:09,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:16:09,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 06:16:09,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106300804] [2020-08-22 06:16:09,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 06:16:09,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:09,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 06:16:09,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:16:09,842 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-22 06:16:09,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:09,915 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-22 06:16:09,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 06:16:09,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 06:16:09,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:09,930 INFO L225 Difference]: With dead ends: 40 [2020-08-22 06:16:09,930 INFO L226 Difference]: Without dead ends: 26 [2020-08-22 06:16:09,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:16:09,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-22 06:16:09,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-22 06:16:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-22 06:16:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-22 06:16:09,986 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-22 06:16:09,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:09,987 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-22 06:16:09,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 06:16:09,987 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-22 06:16:09,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 06:16:09,989 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:09,990 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] [2020-08-22 06:16:09,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 06:16:09,990 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:09,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:09,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-22 06:16:09,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:09,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678321908] [2020-08-22 06:16:09,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:10,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:10,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:10,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:16:10,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678321908] [2020-08-22 06:16:10,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:16:10,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 06:16:10,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405456516] [2020-08-22 06:16:10,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 06:16:10,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:10,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 06:16:10,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:16:10,144 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-22 06:16:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:10,163 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-22 06:16:10,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 06:16:10,164 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-22 06:16:10,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:10,166 INFO L225 Difference]: With dead ends: 32 [2020-08-22 06:16:10,166 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 06:16:10,167 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 [2020-08-22 06:16:10,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 06:16:10,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-22 06:16:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-22 06:16:10,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-22 06:16:10,176 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-22 06:16:10,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:10,176 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-22 06:16:10,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 06:16:10,177 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-22 06:16:10,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 06:16:10,178 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:10,178 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] [2020-08-22 06:16:10,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 06:16:10,179 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:10,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:10,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-22 06:16:10,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:10,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022221786] [2020-08-22 06:16:10,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:10,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:10,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:10,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:10,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:16:10,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022221786] [2020-08-22 06:16:10,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:16:10,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 06:16:10,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831240377] [2020-08-22 06:16:10,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 06:16:10,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:10,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 06:16:10,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 06:16:10,382 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-22 06:16:10,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:10,446 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-22 06:16:10,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 06:16:10,447 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-22 06:16:10,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:10,448 INFO L225 Difference]: With dead ends: 48 [2020-08-22 06:16:10,449 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 06:16:10,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:16:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 06:16:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-22 06:16:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 06:16:10,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-22 06:16:10,459 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-22 06:16:10,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:10,459 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-22 06:16:10,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 06:16:10,460 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-22 06:16:10,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 06:16:10,461 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:10,461 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] [2020-08-22 06:16:10,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 06:16:10,462 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:10,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:10,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-22 06:16:10,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:10,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944688534] [2020-08-22 06:16:10,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:10,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:10,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:10,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:10,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 06:16:10,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944688534] [2020-08-22 06:16:10,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:16:10,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 06:16:10,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256974806] [2020-08-22 06:16:10,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 06:16:10,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:10,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 06:16:10,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:16:10,655 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-22 06:16:10,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:10,689 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-22 06:16:10,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 06:16:10,689 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-22 06:16:10,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:10,691 INFO L225 Difference]: With dead ends: 50 [2020-08-22 06:16:10,691 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 06:16:10,692 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 [2020-08-22 06:16:10,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 06:16:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-22 06:16:10,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 06:16:10,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-22 06:16:10,701 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-22 06:16:10,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:10,701 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-22 06:16:10,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 06:16:10,702 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-22 06:16:10,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 06:16:10,703 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:10,703 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] [2020-08-22 06:16:10,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 06:16:10,704 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:10,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:10,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-22 06:16:10,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:10,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636330914] [2020-08-22 06:16:10,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 06:16:10,722 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 06:16:10,722 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 06:16:10,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 06:16:10,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:16:10 BoogieIcfgContainer [2020-08-22 06:16:10,746 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 06:16:10,749 INFO L168 Benchmark]: Toolchain (without parser) took 2168.18 ms. Allocated memory was 144.7 MB in the beginning and 204.5 MB in the end (delta: 59.8 MB). Free memory was 100.8 MB in the beginning and 88.1 MB in the end (delta: 12.7 MB). Peak memory consumption was 72.5 MB. Max. memory is 7.1 GB. [2020-08-22 06:16:10,750 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 144.7 MB. Free memory was 119.3 MB in the beginning and 118.8 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-22 06:16:10,751 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.74 ms. Allocated memory is still 144.7 MB. Free memory was 100.4 MB in the beginning and 91.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-22 06:16:10,752 INFO L168 Benchmark]: Boogie Preprocessor took 193.20 ms. Allocated memory was 144.7 MB in the beginning and 204.5 MB in the end (delta: 59.8 MB). Free memory was 91.0 MB in the beginning and 182.4 MB in the end (delta: -91.4 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-22 06:16:10,753 INFO L168 Benchmark]: RCFGBuilder took 314.81 ms. Allocated memory is still 204.5 MB. Free memory was 182.4 MB in the beginning and 169.5 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-22 06:16:10,753 INFO L168 Benchmark]: TraceAbstraction took 1364.28 ms. Allocated memory is still 204.5 MB. Free memory was 169.5 MB in the beginning and 88.1 MB in the end (delta: 81.4 MB). Peak memory consumption was 81.4 MB. Max. memory is 7.1 GB. [2020-08-22 06:16:10,777 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 144.7 MB. Free memory was 119.3 MB in the beginning and 118.8 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 276.74 ms. Allocated memory is still 144.7 MB. Free memory was 100.4 MB in the beginning and 91.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 193.20 ms. Allocated memory was 144.7 MB in the beginning and 204.5 MB in the end (delta: 59.8 MB). Free memory was 91.0 MB in the beginning and 182.4 MB in the end (delta: -91.4 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 314.81 ms. Allocated memory is still 204.5 MB. Free memory was 182.4 MB in the beginning and 169.5 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1364.28 ms. Allocated memory is still 204.5 MB. Free memory was 169.5 MB in the beginning and 88.1 MB in the end (delta: 81.4 MB). Peak memory consumption was 81.4 MB. 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, 0.2s 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...