/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 19:20:15,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:20:15,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:20:16,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:20:16,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:20:16,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:20:16,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:20:16,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:20:16,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:20:16,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:20:16,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:20:16,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:20:16,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:20:16,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:20:16,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:20:16,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:20:16,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:20:16,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:20:16,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:20:16,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:20:16,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:20:16,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:20:16,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:20:16,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:20:16,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 19:20:16,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 19:20:16,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 19:20:16,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 19:20:16,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 19:20:16,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 19:20:16,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 19:20:16,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 19:20:16,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 19:20:16,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:20:16,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:20:16,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:20:16,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 19:20:16,160 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:20:16,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:20:16,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:20:16,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:20:16,165 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:20:16,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:20:16,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:20:16,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:20:16,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:20:16,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:20:16,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:20:16,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:20:16,168 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:20:16,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:20:16,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:20:16,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:20:16,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:20:16,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:20:16,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:20:16,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:20:16,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:20:16,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:20:16,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:20:16,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:20:16,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:20:16,170 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:20:16,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:20:16,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:20:16,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:20:16,679 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:20:16,680 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:20:16,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c [2021-01-06 19:20:16,783 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/08b449bef/b2a6a597118447dbb7092e06affd6f4e/FLAG15b52b53a [2021-01-06 19:20:17,493 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:20:17,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_b3_o2-2.c [2021-01-06 19:20:17,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/08b449bef/b2a6a597118447dbb7092e06affd6f4e/FLAG15b52b53a [2021-01-06 19:20:17,842 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/08b449bef/b2a6a597118447dbb7092e06affd6f4e [2021-01-06 19:20:17,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:20:17,850 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:20:17,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:20:17,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:20:17,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:20:17,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:20:17" (1/1) ... [2021-01-06 19:20:17,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672098f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:17, skipping insertion in model container [2021-01-06 19:20:17,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:20:17" (1/1) ... [2021-01-06 19:20:17,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:20:17,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 19:20:18,102 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_b3_o2-2.c[528,541] [2021-01-06 19:20:18,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:20:18,117 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 19:20:18,134 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_b3_o2-2.c[528,541] [2021-01-06 19:20:18,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:20:18,152 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:20:18,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:18 WrapperNode [2021-01-06 19:20:18,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:20:18,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:20:18,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:20:18,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:20:18,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:18" (1/1) ... [2021-01-06 19:20:18,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:18" (1/1) ... [2021-01-06 19:20:18,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:20:18,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:20:18,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:20:18,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:20:18,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:18" (1/1) ... [2021-01-06 19:20:18,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:18" (1/1) ... [2021-01-06 19:20:18,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:18" (1/1) ... [2021-01-06 19:20:18,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:18" (1/1) ... [2021-01-06 19:20:18,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:18" (1/1) ... [2021-01-06 19:20:18,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:18" (1/1) ... [2021-01-06 19:20:18,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:18" (1/1) ... [2021-01-06 19:20:18,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:20:18,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:20:18,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:20:18,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:20:18,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:20:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:20:18,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:20:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:20:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-01-06 19:20:18,374 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-01-06 19:20:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:20:18,608 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:20:18,609 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 19:20:18,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:18 BoogieIcfgContainer [2021-01-06 19:20:18,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:20:18,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:20:18,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:20:18,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:20:18,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:20:17" (1/3) ... [2021-01-06 19:20:18,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37fc9507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:20:18, skipping insertion in model container [2021-01-06 19:20:18,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:18" (2/3) ... [2021-01-06 19:20:18,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37fc9507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:20:18, skipping insertion in model container [2021-01-06 19:20:18,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:18" (3/3) ... [2021-01-06 19:20:18,622 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2021-01-06 19:20:18,630 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:20:18,635 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 19:20:18,659 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 19:20:18,692 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:20:18,693 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:20:18,693 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:20:18,693 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:20:18,693 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:20:18,693 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:20:18,693 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:20:18,693 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:20:18,714 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-01-06 19:20:18,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 19:20:18,722 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:18,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:18,724 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:18,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:18,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1972897208, now seen corresponding path program 1 times [2021-01-06 19:20:18,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:18,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956145238] [2021-01-06 19:20:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:18,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:20:19,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956145238] [2021-01-06 19:20:19,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:20:19,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:20:19,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270960543] [2021-01-06 19:20:19,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:20:19,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:19,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:20:19,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:19,068 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2021-01-06 19:20:19,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:19,131 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-01-06 19:20:19,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:20:19,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-06 19:20:19,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:19,153 INFO L225 Difference]: With dead ends: 29 [2021-01-06 19:20:19,153 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 19:20:19,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:19,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 19:20:19,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 19:20:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 19:20:19,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-01-06 19:20:19,208 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2021-01-06 19:20:19,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:19,208 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-01-06 19:20:19,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:20:19,209 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-01-06 19:20:19,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 19:20:19,211 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:19,211 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:19,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:20:19,211 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:19,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:19,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1641441273, now seen corresponding path program 1 times [2021-01-06 19:20:19,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:19,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639205810] [2021-01-06 19:20:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:19,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:19,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:20:19,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639205810] [2021-01-06 19:20:19,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:20:19,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:20:19,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194464259] [2021-01-06 19:20:19,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:20:19,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:19,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:20:19,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:19,350 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2021-01-06 19:20:19,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:19,397 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-01-06 19:20:19,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:20:19,398 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2021-01-06 19:20:19,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:19,400 INFO L225 Difference]: With dead ends: 28 [2021-01-06 19:20:19,400 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 19:20:19,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:19,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 19:20:19,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-01-06 19:20:19,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 19:20:19,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-01-06 19:20:19,415 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 17 [2021-01-06 19:20:19,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:19,417 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-01-06 19:20:19,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:20:19,417 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-01-06 19:20:19,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 19:20:19,419 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:19,419 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:19,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 19:20:19,420 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:19,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:19,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1670070424, now seen corresponding path program 1 times [2021-01-06 19:20:19,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:19,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268846420] [2021-01-06 19:20:19,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:19,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:19,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:20:19,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268846420] [2021-01-06 19:20:19,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889090367] [2021-01-06 19:20:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:19,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 19:20:19,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:20:19,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:19,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 19:20:19,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731729385] [2021-01-06 19:20:19,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 19:20:19,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:19,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 19:20:19,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:20:19,956 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2021-01-06 19:20:20,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:20,027 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-01-06 19:20:20,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 19:20:20,028 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2021-01-06 19:20:20,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:20,031 INFO L225 Difference]: With dead ends: 24 [2021-01-06 19:20:20,032 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 19:20:20,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-06 19:20:20,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 19:20:20,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 19:20:20,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 19:20:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-01-06 19:20:20,043 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2021-01-06 19:20:20,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:20,043 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-01-06 19:20:20,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 19:20:20,044 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-01-06 19:20:20,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 19:20:20,047 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:20,047 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:20,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 19:20:20,262 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:20,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:20,263 INFO L82 PathProgramCache]: Analyzing trace with hash -755943847, now seen corresponding path program 1 times [2021-01-06 19:20:20,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:20,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176565845] [2021-01-06 19:20:20,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:20,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:20,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:20,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 19:20:20,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176565845] [2021-01-06 19:20:20,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:20:20,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:20:20,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129192507] [2021-01-06 19:20:20,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:20:20,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:20,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:20:20,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:20,445 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2021-01-06 19:20:20,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:20,459 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-01-06 19:20:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:20:20,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2021-01-06 19:20:20,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:20,460 INFO L225 Difference]: With dead ends: 26 [2021-01-06 19:20:20,460 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 19:20:20,461 INFO L677 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 [2021-01-06 19:20:20,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 19:20:20,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-01-06 19:20:20,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 19:20:20,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-01-06 19:20:20,466 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 24 [2021-01-06 19:20:20,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:20,466 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-01-06 19:20:20,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:20:20,467 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-01-06 19:20:20,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 19:20:20,467 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:20,468 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:20,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 19:20:20,468 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:20,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:20,469 INFO L82 PathProgramCache]: Analyzing trace with hash -727314696, now seen corresponding path program 2 times [2021-01-06 19:20:20,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:20,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73751043] [2021-01-06 19:20:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 19:20:20,498 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 19:20:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 19:20:20,524 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 19:20:20,547 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 19:20:20,547 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 19:20:20,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 19:20:20,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 07:20:20 BoogieIcfgContainer [2021-01-06 19:20:20,588 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 19:20:20,589 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 19:20:20,589 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 19:20:20,589 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 19:20:20,590 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:18" (3/4) ... [2021-01-06 19:20:20,592 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 19:20:20,666 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/id_b3_o2-2.c-witness.graphml [2021-01-06 19:20:20,667 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 19:20:20,669 INFO L168 Benchmark]: Toolchain (without parser) took 2818.57 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 109.5 MB in the beginning and 123.4 MB in the end (delta: -13.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:20,669 INFO L168 Benchmark]: CDTParser took 0.64 ms. Allocated memory is still 152.0 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 19:20:20,670 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.05 ms. Allocated memory is still 152.0 MB. Free memory was 109.2 MB in the beginning and 131.1 MB in the end (delta: -22.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:20,671 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.02 ms. Allocated memory is still 152.0 MB. Free memory was 131.1 MB in the beginning and 129.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:20,672 INFO L168 Benchmark]: Boogie Preprocessor took 21.74 ms. Allocated memory is still 152.0 MB. Free memory was 129.7 MB in the beginning and 129.0 MB in the end (delta: 628.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:20,672 INFO L168 Benchmark]: RCFGBuilder took 391.57 ms. Allocated memory is still 152.0 MB. Free memory was 129.0 MB in the beginning and 124.4 MB in the end (delta: 4.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:20,673 INFO L168 Benchmark]: TraceAbstraction took 1975.19 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 123.9 MB in the beginning and 125.5 MB in the end (delta: -1.6 MB). Peak memory consumption was 29.2 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:20,674 INFO L168 Benchmark]: Witness Printer took 77.79 ms. Allocated memory is still 182.5 MB. Free memory was 125.5 MB in the beginning and 123.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:20,678 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.64 ms. Allocated memory is still 152.0 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 299.05 ms. Allocated memory is still 152.0 MB. Free memory was 109.2 MB in the beginning and 131.1 MB in the end (delta: -22.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 42.02 ms. Allocated memory is still 152.0 MB. Free memory was 131.1 MB in the beginning and 129.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.74 ms. Allocated memory is still 152.0 MB. Free memory was 129.7 MB in the beginning and 129.0 MB in the end (delta: 628.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 391.57 ms. Allocated memory is still 152.0 MB. Free memory was 129.0 MB in the beginning and 124.4 MB in the end (delta: 4.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1975.19 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 123.9 MB in the beginning and 125.5 MB in the end (delta: -1.6 MB). Peak memory consumption was 29.2 MB. Max. memory is 8.0 GB. * Witness Printer took 77.79 ms. Allocated memory is still 182.5 MB. Free memory was 125.5 MB in the beginning and 123.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int input = __VERIFIER_nondet_int(); [L15] CALL, EXPR id(input) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=1, id((unsigned int)x-1)=0, x=1] [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L8] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=2, id((unsigned int)x-1)=1, x=2] [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L15] RET, EXPR id(input) [L15] int result = id(input); [L16] COND TRUE result == 2 [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 65 SDtfs, 7 SDslu, 208 SDs, 0 SdLazy, 60 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=3, 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, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 109 NumberOfCodeBlocks, 109 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 2274 SizeOfPredicates, 1 NumberOfNonLiveVariables, 72 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 23/27 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...