/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=0.1 --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/Addition02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:00:07,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:00:07,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:00:07,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 03:00:07,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:00:07,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:00:07,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:00:07,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:00:07,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:00:07,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:00:07,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:00:07,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:00:07,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:00:07,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:00:07,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:00:07,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:00:07,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 03:00:07,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:00:07,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:00:07,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:00:07,637 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 03:00:07,673 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:00:07,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:00:07,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:00:07,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:00:07,675 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:00:07,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:00:07,676 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:00:07,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:00:07,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:00:07,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:00:07,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:00:07,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:00:07,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:00:07,678 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:00:07,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:00:07,678 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:00:07,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:00:07,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:00:07,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:00:07,679 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:00:07,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:00:07,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:00:07,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:00:07,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:00:07,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:00:07,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:00:07,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:00:07,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:00:07,681 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:00:07,681 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=0.1;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=0.1;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=0.1;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=0.1;log-additional-information=true; [2020-08-22 03:00:07,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:00:07,983 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:00:07,986 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:00:07,988 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:00:07,988 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:00:07,989 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition02.c [2020-08-22 03:00:08,051 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56c35f892/4395f25d574a4687ba47b310b9ccc693/FLAGd8933e080 [2020-08-22 03:00:08,514 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:00:08,515 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Addition02.c [2020-08-22 03:00:08,522 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56c35f892/4395f25d574a4687ba47b310b9ccc693/FLAGd8933e080 [2020-08-22 03:00:08,924 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56c35f892/4395f25d574a4687ba47b310b9ccc693 [2020-08-22 03:00:08,933 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:00:08,934 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:00:08,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:00:08,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:00:08,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:00:08,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:00:08" (1/1) ... [2020-08-22 03:00:08,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63d87313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:00:08, skipping insertion in model container [2020-08-22 03:00:08,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:00:08" (1/1) ... [2020-08-22 03:00:08,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:00:08,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:00:09,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:00:09,162 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:00:09,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:00:09,193 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:00:09,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:00:09 WrapperNode [2020-08-22 03:00:09,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:00:09,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:00:09,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:00:09,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:00:09,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:00:09" (1/1) ... [2020-08-22 03:00:09,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:00:09" (1/1) ... [2020-08-22 03:00:09,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:00:09" (1/1) ... [2020-08-22 03:00:09,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:00:09" (1/1) ... [2020-08-22 03:00:09,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:00:09" (1/1) ... [2020-08-22 03:00:09,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:00:09" (1/1) ... [2020-08-22 03:00:09,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:00:09" (1/1) ... [2020-08-22 03:00:09,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:00:09,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:00:09,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:00:09,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:00:09,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:00:09" (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 03:00:09,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:00:09,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:00:09,367 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2020-08-22 03:00:09,367 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:00:09,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:00:09,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 03:00:09,367 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2020-08-22 03:00:09,368 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:00:09,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:00:09,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:00:09,554 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:00:09,554 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 03:00:09,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:00:09 BoogieIcfgContainer [2020-08-22 03:00:09,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:00:09,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:00:09,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:00:09,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:00:09,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:00:08" (1/3) ... [2020-08-22 03:00:09,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43a60d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:00:09, skipping insertion in model container [2020-08-22 03:00:09,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:00:09" (2/3) ... [2020-08-22 03:00:09,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43a60d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:00:09, skipping insertion in model container [2020-08-22 03:00:09,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:00:09" (3/3) ... [2020-08-22 03:00:09,567 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition02.c [2020-08-22 03:00:09,579 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:00:09,589 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:00:09,631 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:00:09,682 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:00:09,682 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:00:09,682 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:00:09,682 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:00:09,682 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:00:09,683 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:00:09,683 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:00:09,683 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:00:09,704 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-08-22 03:00:09,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 03:00:09,717 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:00:09,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:00:09,719 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:00:09,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:00:09,727 INFO L82 PathProgramCache]: Analyzing trace with hash -854965079, now seen corresponding path program 1 times [2020-08-22 03:00:09,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:00:09,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467321417] [2020-08-22 03:00:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:00:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:00:09,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:00:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:00:09,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 03:00:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:00:10,044 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 03:00:10,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467321417] [2020-08-22 03:00:10,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:00:10,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 03:00:10,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375259012] [2020-08-22 03:00:10,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 03:00:10,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:00:10,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 03:00:10,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:00:10,089 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-08-22 03:00:10,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:00:10,363 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-08-22 03:00:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 03:00:10,366 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-08-22 03:00:10,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:00:10,380 INFO L225 Difference]: With dead ends: 38 [2020-08-22 03:00:10,380 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 03:00:10,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:00:10,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 03:00:10,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 03:00:10,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 03:00:10,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-08-22 03:00:10,436 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-08-22 03:00:10,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:00:10,436 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-08-22 03:00:10,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 03:00:10,437 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-08-22 03:00:10,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 03:00:10,439 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:00:10,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:00:10,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:00:10,440 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:00:10,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:00:10,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1632999070, now seen corresponding path program 1 times [2020-08-22 03:00:10,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:00:10,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545261789] [2020-08-22 03:00:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:00:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:00:10,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:00:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:00:10,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 03:00:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:00:10,550 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 03:00:10,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545261789] [2020-08-22 03:00:10,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:00:10,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 03:00:10,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5858711] [2020-08-22 03:00:10,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 03:00:10,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:00:10,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 03:00:10,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:00:10,555 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-08-22 03:00:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:00:10,642 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2020-08-22 03:00:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 03:00:10,643 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-08-22 03:00:10,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:00:10,644 INFO L225 Difference]: With dead ends: 35 [2020-08-22 03:00:10,645 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 03:00:10,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:00:10,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 03:00:10,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 03:00:10,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 03:00:10,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 03:00:10,654 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2020-08-22 03:00:10,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:00:10,654 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 03:00:10,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 03:00:10,655 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 03:00:10,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 03:00:10,656 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:00:10,656 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] [2020-08-22 03:00:10,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:00:10,657 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:00:10,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:00:10,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1746800232, now seen corresponding path program 1 times [2020-08-22 03:00:10,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:00:10,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785113134] [2020-08-22 03:00:10,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:00:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 03:00:10,678 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 03:00:10,678 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 03:00:10,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:00:10,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 03:00:10 BoogieIcfgContainer [2020-08-22 03:00:10,700 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 03:00:10,703 INFO L168 Benchmark]: Toolchain (without parser) took 1768.12 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 104.4 MB in the beginning and 107.0 MB in the end (delta: -2.6 MB). Peak memory consumption was 60.8 MB. Max. memory is 7.1 GB. [2020-08-22 03:00:10,705 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-22 03:00:10,706 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.41 ms. Allocated memory is still 141.6 MB. Free memory was 104.2 MB in the beginning and 94.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-22 03:00:10,707 INFO L168 Benchmark]: Boogie Preprocessor took 105.31 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 94.7 MB in the beginning and 183.8 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-22 03:00:10,708 INFO L168 Benchmark]: RCFGBuilder took 258.16 ms. Allocated memory is still 205.0 MB. Free memory was 183.4 MB in the beginning and 170.3 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-22 03:00:10,708 INFO L168 Benchmark]: TraceAbstraction took 1140.57 ms. Allocated memory is still 205.0 MB. Free memory was 169.7 MB in the beginning and 107.0 MB in the end (delta: 62.6 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. [2020-08-22 03:00:10,712 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 259.41 ms. Allocated memory is still 141.6 MB. Free memory was 104.2 MB in the beginning and 94.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.31 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 94.7 MB in the beginning and 183.8 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 258.16 ms. Allocated memory is still 205.0 MB. Free memory was 183.4 MB in the beginning and 170.3 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1140.57 ms. Allocated memory is still 205.0 MB. Free memory was 169.7 MB in the beginning and 107.0 MB in the end (delta: 62.6 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 43]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L27] int m = __VERIFIER_nondet_int(); [L28] COND FALSE !(m < 0 || m > 1073741823) [L33] int n = __VERIFIER_nondet_int(); [L34] COND FALSE !(n < 0 || n > 1073741823) [L39] CALL, EXPR addition(m,n) [L14] COND FALSE !(n == 0) [L17] COND TRUE n > 0 [L18] CALL, EXPR addition(m+1, n-1) [L14] COND TRUE n == 0 [L15] return m; [L18] RET, EXPR addition(m+1, n-1) [L18] return addition(m+1, n-1); [L39] RET, EXPR addition(m,n) [L39] int result = addition(m,n); [L40] COND FALSE !(result == m - n) [L43] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 41 SDtfs, 33 SDslu, 96 SDs, 0 SdLazy, 116 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 1644 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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...