/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=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 12:06:13,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 12:06:13,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 12:06:13,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 12:06:13,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 12:06:13,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 12:06:13,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 12:06:13,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 12:06:13,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 12:06:13,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 12:06:13,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 12:06:13,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 12:06:13,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 12:06:13,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 12:06:13,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 12:06:13,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 12:06:13,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 12:06:13,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 12:06:13,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 12:06:13,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 12:06:13,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 12:06:13,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 12:06:13,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 12:06:13,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 12:06:13,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 12:06:13,439 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 12:06:13,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 12:06:13,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 12:06:13,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 12:06:13,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-18 12:06:13,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:06:13,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:06:13,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:06:13,450 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 12:06:13,474 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:06:13,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:06:13,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:06:13,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:06:13,475 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:06:13,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:06:13,476 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:06:13,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:06:13,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:06:13,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:06:13,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:06:13,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:06:13,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:06:13,477 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:06:13,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:06:13,477 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:06:13,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:06:13,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:06:13,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:06:13,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:06:13,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:06:13,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:06:13,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:06:13,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:06:13,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:06:13,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:06:13,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:06:13,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:06:13,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:06:13,480 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=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 12:06:13,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:06:13,773 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:06:13,776 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:06:13,778 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:06:13,778 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:06:13,779 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-08-18 12:06:13,846 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e45a6cfb3/a70b3530ef5b4cd29c6786721f7d9fd8/FLAG9f8f258f7 [2020-08-18 12:06:14,346 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:06:14,350 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-08-18 12:06:14,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e45a6cfb3/a70b3530ef5b4cd29c6786721f7d9fd8/FLAG9f8f258f7 [2020-08-18 12:06:14,690 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e45a6cfb3/a70b3530ef5b4cd29c6786721f7d9fd8 [2020-08-18 12:06:14,699 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:06:14,700 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:06:14,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:06:14,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:06:14,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:06:14,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:06:14" (1/1) ... [2020-08-18 12:06:14,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20f2544e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:14, skipping insertion in model container [2020-08-18 12:06:14,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:06:14" (1/1) ... [2020-08-18 12:06:14,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:06:14,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:06:14,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:06:14,978 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:06:14,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:06:15,002 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:06:15,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:15 WrapperNode [2020-08-18 12:06:15,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:06:15,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:06:15,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:06:15,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:06:15,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:15" (1/1) ... [2020-08-18 12:06:15,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:15" (1/1) ... [2020-08-18 12:06:15,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:15" (1/1) ... [2020-08-18 12:06:15,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:15" (1/1) ... [2020-08-18 12:06:15,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:15" (1/1) ... [2020-08-18 12:06:15,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:15" (1/1) ... [2020-08-18 12:06:15,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:15" (1/1) ... [2020-08-18 12:06:15,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:06:15,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:06:15,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:06:15,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:06:15,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:15" (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 12:06:15,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:06:15,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:06:15,170 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2020-08-18 12:06:15,170 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:06:15,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:06:15,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 12:06:15,171 INFO L130 BoogieDeclarations]: Found specification of procedure A [2020-08-18 12:06:15,171 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:06:15,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:06:15,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:06:15,347 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:06:15,348 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 12:06:15,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:06:15 BoogieIcfgContainer [2020-08-18 12:06:15,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:06:15,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:06:15,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:06:15,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:06:15,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:06:14" (1/3) ... [2020-08-18 12:06:15,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ce9302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:06:15, skipping insertion in model container [2020-08-18 12:06:15,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:15" (2/3) ... [2020-08-18 12:06:15,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ce9302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:06:15, skipping insertion in model container [2020-08-18 12:06:15,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:06:15" (3/3) ... [2020-08-18 12:06:15,361 INFO L109 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2020-08-18 12:06:15,373 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:06:15,380 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 12:06:15,400 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 12:06:15,429 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:06:15,430 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:06:15,430 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:06:15,430 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:06:15,430 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:06:15,430 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:06:15,430 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:06:15,431 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:06:15,456 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-08-18 12:06:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 12:06:15,470 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:15,475 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:15,475 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:15,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:15,494 INFO L82 PathProgramCache]: Analyzing trace with hash -284235614, now seen corresponding path program 1 times [2020-08-18 12:06:15,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:15,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247575022] [2020-08-18 12:06:15,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:15,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:15,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:06:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:15,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:06:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 12:06:15,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247575022] [2020-08-18 12:06:15,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:15,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 12:06:15,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484787277] [2020-08-18 12:06:15,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:06:15,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:15,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:06:15,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:06:15,808 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2020-08-18 12:06:15,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:15,996 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-18 12:06:15,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 12:06:15,998 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-18 12:06:15,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:16,009 INFO L225 Difference]: With dead ends: 45 [2020-08-18 12:06:16,010 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 12:06:16,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:06:16,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 12:06:16,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 12:06:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 12:06:16,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-08-18 12:06:16,063 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 20 [2020-08-18 12:06:16,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:16,064 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-08-18 12:06:16,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:06:16,065 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-08-18 12:06:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-18 12:06:16,067 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:16,067 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:16,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:06:16,068 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:16,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:16,069 INFO L82 PathProgramCache]: Analyzing trace with hash -920468714, now seen corresponding path program 1 times [2020-08-18 12:06:16,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:16,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895866811] [2020-08-18 12:06:16,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 12:06:16,102 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 12:06:16,103 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 12:06:16,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:06:16,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 12:06:16 BoogieIcfgContainer [2020-08-18 12:06:16,127 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 12:06:16,130 INFO L168 Benchmark]: Toolchain (without parser) took 1428.56 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 103.7 MB in the beginning and 129.4 MB in the end (delta: -25.8 MB). Peak memory consumption was 37.1 MB. Max. memory is 7.1 GB. [2020-08-18 12:06:16,131 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 12:06:16,132 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.03 ms. Allocated memory is still 140.0 MB. Free memory was 103.5 MB in the beginning and 93.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-18 12:06:16,133 INFO L168 Benchmark]: Boogie Preprocessor took 24.43 ms. Allocated memory is still 140.0 MB. Free memory was 93.7 MB in the beginning and 92.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-18 12:06:16,135 INFO L168 Benchmark]: RCFGBuilder took 323.73 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 170.9 MB in the end (delta: -78.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-18 12:06:16,135 INFO L168 Benchmark]: TraceAbstraction took 773.25 ms. Allocated memory is still 202.9 MB. Free memory was 170.2 MB in the beginning and 129.4 MB in the end (delta: 40.8 MB). Peak memory consumption was 40.8 MB. Max. memory is 7.1 GB. [2020-08-18 12:06:16,140 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 302.03 ms. Allocated memory is still 140.0 MB. Free memory was 103.5 MB in the beginning and 93.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.43 ms. Allocated memory is still 140.0 MB. Free memory was 93.7 MB in the beginning and 92.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 323.73 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 170.9 MB in the end (delta: -78.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 773.25 ms. Allocated memory is still 202.9 MB. Free memory was 170.2 MB in the beginning and 129.4 MB in the end (delta: 40.8 MB). Peak memory consumption was 40.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 31]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int g; [L26] int g = __VERIFIER_nondet_int(); [L27] int h = !g; [L28] CALL A(g,h) [L17] COND TRUE \read(a1) [L18] CALL A(a2,a1) [L17] COND FALSE !(\read(a1)) [L20] g = a2 [L18] RET A(a2,a1) [L28] RET A(g,h) [L29] CALL A(g,h) [L17] COND TRUE \read(a1) [L18] CALL A(a2,a1) [L17] COND FALSE !(\read(a1)) [L20] g = a2 [L18] RET A(a2,a1) [L29] RET A(g,h) [L30] COND TRUE \read(g) [L31] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 10 SDslu, 54 SDs, 0 SdLazy, 44 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 741 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 0 PerfectInterpolantSequences, 1/4 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...