/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER -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 0.1.25-5644d1e-m [2020-08-18 18:40:54,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:40:54,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:40:54,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:40:54,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:40:54,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:40:54,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:40:54,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:40:54,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:40:54,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:40:54,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:40:54,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:40:54,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:40:55,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:40:55,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:40:55,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:40:55,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:40:55,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:40:55,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:40:55,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:40:55,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:40:55,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:40:55,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:40:55,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:40:55,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 18:40:55,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 18:40:55,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 18:40:55,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 18:40:55,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 18:40:55,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-18 18:40:55,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:40:55,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:40:55,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:40:55,050 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 [2020-08-18 18:40:55,087 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:40:55,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:40:55,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:40:55,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:40:55,089 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:40:55,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:40:55,090 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:40:55,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:40:55,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:40:55,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:40:55,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:40:55,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:40:55,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:40:55,091 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:40:55,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:40:55,092 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:40:55,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:40:55,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:40:55,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:40:55,092 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:40:55,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:40:55,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:40:55,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:40:55,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:40:55,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:40:55,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:40:55,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:40:55,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:40:55,094 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:40:55,094 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=5;interpolation-heuristic=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:40:55,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:40:55,428 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:40:55,433 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:40:55,435 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:40:55,435 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:40:55,437 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-08-18 18:40:55,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa29eac95/15ec1bfb808e4ee79897ae869cd4bbc0/FLAG4727faa0a [2020-08-18 18:40:55,958 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:40:55,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-08-18 18:40:55,966 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa29eac95/15ec1bfb808e4ee79897ae869cd4bbc0/FLAG4727faa0a [2020-08-18 18:40:56,356 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa29eac95/15ec1bfb808e4ee79897ae869cd4bbc0 [2020-08-18 18:40:56,365 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:40:56,367 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:40:56,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:40:56,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:40:56,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:40:56,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:40:56" (1/1) ... [2020-08-18 18:40:56,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1190dd1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:56, skipping insertion in model container [2020-08-18 18:40:56,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:40:56" (1/1) ... [2020-08-18 18:40:56,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:40:56,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:40:56,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:40:56,585 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:40:56,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:40:56,612 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:40:56,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:56 WrapperNode [2020-08-18 18:40:56,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:40:56,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:40:56,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:40:56,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:40:56,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:56" (1/1) ... [2020-08-18 18:40:56,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:56" (1/1) ... [2020-08-18 18:40:56,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:56" (1/1) ... [2020-08-18 18:40:56,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:56" (1/1) ... [2020-08-18 18:40:56,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:56" (1/1) ... [2020-08-18 18:40:56,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:56" (1/1) ... [2020-08-18 18:40:56,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:56" (1/1) ... [2020-08-18 18:40:56,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:40:56,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:40:56,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:40:56,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:40:56,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:40:56,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:40:56,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:40:56,781 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-18 18:40:56,781 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-18 18:40:56,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:40:56,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 18:40:56,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:40:56,782 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-18 18:40:56,782 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-18 18:40:56,782 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:40:56,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:40:56,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:40:56,978 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:40:56,979 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 18:40:56,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:40:56 BoogieIcfgContainer [2020-08-18 18:40:56,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:40:56,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:40:56,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:40:56,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:40:56,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:40:56" (1/3) ... [2020-08-18 18:40:56,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1adf3fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:40:56, skipping insertion in model container [2020-08-18 18:40:56,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:56" (2/3) ... [2020-08-18 18:40:56,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1adf3fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:40:56, skipping insertion in model container [2020-08-18 18:40:56,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:40:56" (3/3) ... [2020-08-18 18:40:56,991 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-08-18 18:40:57,004 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:40:57,015 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:40:57,033 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:40:57,061 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:40:57,061 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:40:57,061 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:40:57,062 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:40:57,062 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:40:57,062 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:40:57,062 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:40:57,062 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:40:57,084 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-18 18:40:57,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 18:40:57,091 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:57,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:40:57,093 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:57,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:57,099 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-18 18:40:57,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:57,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360839147] [2020-08-18 18:40:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:40:57,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360839147] [2020-08-18 18:40:57,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:40:57,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:40:57,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324591215] [2020-08-18 18:40:57,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:40:57,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:57,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:40:57,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:40:57,416 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-18 18:40:57,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:57,476 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-18 18:40:57,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:40:57,479 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 18:40:57,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:57,490 INFO L225 Difference]: With dead ends: 40 [2020-08-18 18:40:57,490 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 18:40:57,494 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 [2020-08-18 18:40:57,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 18:40:57,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-18 18:40:57,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 18:40:57,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-18 18:40:57,538 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-18 18:40:57,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:57,538 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-18 18:40:57,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:40:57,539 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-18 18:40:57,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 18:40:57,541 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:57,541 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] [2020-08-18 18:40:57,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:40:57,542 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:57,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:57,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-18 18:40:57,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:57,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832674203] [2020-08-18 18:40:57,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:40:57,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832674203] [2020-08-18 18:40:57,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:40:57,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:40:57,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536903177] [2020-08-18 18:40:57,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:40:57,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:57,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:40:57,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:40:57,703 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-18 18:40:57,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:57,721 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-18 18:40:57,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:40:57,722 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 18:40:57,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:57,724 INFO L225 Difference]: With dead ends: 32 [2020-08-18 18:40:57,724 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 18:40:57,725 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 [2020-08-18 18:40:57,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 18:40:57,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-18 18:40:57,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 18:40:57,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-18 18:40:57,733 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-18 18:40:57,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:57,734 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-18 18:40:57,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:40:57,735 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-18 18:40:57,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 18:40:57,736 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:57,736 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] [2020-08-18 18:40:57,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:40:57,737 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:57,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:57,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-18 18:40:57,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:57,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464024921] [2020-08-18 18:40:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:40:57,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464024921] [2020-08-18 18:40:57,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:40:57,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 18:40:57,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874377898] [2020-08-18 18:40:57,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:40:57,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:57,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:40:57,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:40:57,967 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-18 18:40:58,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:58,043 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-18 18:40:58,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:40:58,044 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-18 18:40:58,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:58,045 INFO L225 Difference]: With dead ends: 48 [2020-08-18 18:40:58,045 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 18:40:58,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:40:58,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 18:40:58,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 18:40:58,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 18:40:58,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-18 18:40:58,055 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-18 18:40:58,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:58,056 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-18 18:40:58,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:40:58,056 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-18 18:40:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 18:40:58,058 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:58,058 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] [2020-08-18 18:40:58,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:40:58,062 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:58,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:58,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-18 18:40:58,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:58,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118705814] [2020-08-18 18:40:58,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:58,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 18:40:58,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118705814] [2020-08-18 18:40:58,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:40:58,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:40:58,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784349323] [2020-08-18 18:40:58,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:40:58,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:58,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:40:58,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:40:58,192 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-18 18:40:58,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:58,240 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-18 18:40:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:40:58,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-18 18:40:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:58,244 INFO L225 Difference]: With dead ends: 50 [2020-08-18 18:40:58,244 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 18:40:58,245 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 [2020-08-18 18:40:58,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 18:40:58,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-18 18:40:58,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 18:40:58,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-18 18:40:58,262 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-18 18:40:58,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:58,264 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-18 18:40:58,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:40:58,265 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-18 18:40:58,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 18:40:58,266 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:58,266 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] [2020-08-18 18:40:58,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:40:58,267 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:58,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:58,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-18 18:40:58,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:58,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894071809] [2020-08-18 18:40:58,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 18:40:58,312 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 18:40:58,313 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 18:40:58,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:40:58,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:40:58 BoogieIcfgContainer [2020-08-18 18:40:58,354 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:40:58,357 INFO L168 Benchmark]: Toolchain (without parser) took 1989.28 ms. Allocated memory was 140.0 MB in the beginning and 237.0 MB in the end (delta: 97.0 MB). Free memory was 102.2 MB in the beginning and 203.2 MB in the end (delta: -101.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 18:40:58,359 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 18:40:58,362 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.21 ms. Allocated memory is still 140.0 MB. Free memory was 101.9 MB in the beginning and 92.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-18 18:40:58,364 INFO L168 Benchmark]: Boogie Preprocessor took 101.93 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 92.3 MB in the beginning and 182.0 MB in the end (delta: -89.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 18:40:58,372 INFO L168 Benchmark]: RCFGBuilder took 267.91 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 168.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 18:40:58,373 INFO L168 Benchmark]: TraceAbstraction took 1369.25 ms. Allocated memory was 202.9 MB in the beginning and 237.0 MB in the end (delta: 34.1 MB). Free memory was 168.3 MB in the beginning and 203.2 MB in the end (delta: -34.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 18:40:58,384 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 245.21 ms. Allocated memory is still 140.0 MB. Free memory was 101.9 MB in the beginning and 92.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 101.93 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 92.3 MB in the beginning and 182.0 MB in the end (delta: -89.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 267.91 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 168.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1369.25 ms. Allocated memory was 202.9 MB in the beginning and 237.0 MB in the end (delta: 34.1 MB). Free memory was 168.3 MB in the beginning and 203.2 MB in the end (delta: -34.9 MB). There was no memory consumed. 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, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s 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...