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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 11:23:51,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 11:23:51,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 11:23:51,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 11:23:51,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 11:23:51,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 11:23:51,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 11:23:51,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 11:23:51,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 11:23:51,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 11:23:51,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 11:23:51,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 11:23:51,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 11:23:51,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 11:23:51,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 11:23:51,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 11:23:51,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 11:23:51,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 11:23:51,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 11:23:51,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 11:23:51,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 11:23:51,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 11:23:51,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 11:23:51,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 11:23:51,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 11:23:51,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 11:23:51,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 11:23:51,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 11:23:51,407 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-02 11:23:51,424 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 11:23:51,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 11:23:51,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-02 11:23:51,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-02 11:23:51,426 INFO L138 SettingsManager]: * Use SBE=true [2019-10-02 11:23:51,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 11:23:51,427 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 11:23:51,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-02 11:23:51,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 11:23:51,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 11:23:51,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 11:23:51,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 11:23:51,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 11:23:51,428 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 11:23:51,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 11:23:51,428 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-02 11:23:51,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 11:23:51,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 11:23:51,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 11:23:51,429 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-02 11:23:51,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-02 11:23:51,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 11:23:51,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 11:23:51,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 11:23:51,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-02 11:23:51,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-02 11:23:51,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 11:23:51,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-02 11:23:51,431 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 11:23:51,459 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 11:23:51,471 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 11:23:51,474 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 11:23:51,475 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 11:23:51,476 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 11:23:51,476 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-10-02 11:23:51,554 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22cc5b471/5827c98ef01e4cef9c52a93ecbaf157e/FLAG45e51fcf0 [2019-10-02 11:23:51,989 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 11:23:51,992 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-10-02 11:23:51,998 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22cc5b471/5827c98ef01e4cef9c52a93ecbaf157e/FLAG45e51fcf0 [2019-10-02 11:23:52,392 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22cc5b471/5827c98ef01e4cef9c52a93ecbaf157e [2019-10-02 11:23:52,403 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 11:23:52,407 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 11:23:52,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 11:23:52,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 11:23:52,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 11:23:52,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:23:52" (1/1) ... [2019-10-02 11:23:52,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e611eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:52, skipping insertion in model container [2019-10-02 11:23:52,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:23:52" (1/1) ... [2019-10-02 11:23:52,424 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 11:23:52,442 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 11:23:52,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:23:52,689 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 11:23:52,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:23:52,730 INFO L192 MainTranslator]: Completed translation [2019-10-02 11:23:52,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:52 WrapperNode [2019-10-02 11:23:52,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 11:23:52,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 11:23:52,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 11:23:52,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 11:23:52,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:52" (1/1) ... [2019-10-02 11:23:52,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:52" (1/1) ... [2019-10-02 11:23:52,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:52" (1/1) ... [2019-10-02 11:23:52,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:52" (1/1) ... [2019-10-02 11:23:52,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:52" (1/1) ... [2019-10-02 11:23:52,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:52" (1/1) ... [2019-10-02 11:23:52,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:52" (1/1) ... [2019-10-02 11:23:52,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 11:23:52,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 11:23:52,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 11:23:52,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 11:23:52,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-10-02 11:23:52,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 11:23:52,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 11:23:52,919 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-02 11:23:52,919 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 11:23:52,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 11:23:52,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-02 11:23:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-02 11:23:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 11:23:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 11:23:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 11:23:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 11:23:53,122 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 11:23:53,123 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 11:23:53,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:23:53 BoogieIcfgContainer [2019-10-02 11:23:53,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 11:23:53,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 11:23:53,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 11:23:53,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 11:23:53,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 11:23:52" (1/3) ... [2019-10-02 11:23:53,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127c4265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:23:53, skipping insertion in model container [2019-10-02 11:23:53,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:52" (2/3) ... [2019-10-02 11:23:53,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127c4265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:23:53, skipping insertion in model container [2019-10-02 11:23:53,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:23:53" (3/3) ... [2019-10-02 11:23:53,146 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2019-10-02 11:23:53,176 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 11:23:53,193 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 11:23:53,216 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 11:23:53,250 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-02 11:23:53,251 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 11:23:53,251 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-02 11:23:53,252 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 11:23:53,252 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 11:23:53,252 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 11:23:53,252 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 11:23:53,252 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 11:23:53,252 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 11:23:53,270 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-02 11:23:53,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-02 11:23:53,275 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:53,275 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:53,277 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:53,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:53,282 INFO L82 PathProgramCache]: Analyzing trace with hash 429908039, now seen corresponding path program 1 times [2019-10-02 11:23:53,283 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:53,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:53,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:53,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:53,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:23:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:53,540 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 11:23:53,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 11:23:53,544 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 11:23:53,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 11:23:53,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-02 11:23:53,557 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2019-10-02 11:23:53,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:53,711 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2019-10-02 11:23:53,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 11:23:53,713 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-10-02 11:23:53,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:53,724 INFO L225 Difference]: With dead ends: 50 [2019-10-02 11:23:53,724 INFO L226 Difference]: Without dead ends: 26 [2019-10-02 11:23:53,728 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-02 11:23:53,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-02 11:23:53,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-10-02 11:23:53,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-02 11:23:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-10-02 11:23:53,779 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2019-10-02 11:23:53,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:53,780 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-10-02 11:23:53,780 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 11:23:53,780 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-10-02 11:23:53,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-02 11:23:53,781 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:53,782 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:53,782 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:53,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:53,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1060899037, now seen corresponding path program 1 times [2019-10-02 11:23:53,783 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:53,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:53,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:53,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:53,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:23:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:53,990 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 11:23:53,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-02 11:23:53,991 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 11:23:53,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 11:23:53,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-02 11:23:53,993 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2019-10-02 11:23:54,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:54,104 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2019-10-02 11:23:54,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 11:23:54,105 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-10-02 11:23:54,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:54,106 INFO L225 Difference]: With dead ends: 32 [2019-10-02 11:23:54,106 INFO L226 Difference]: Without dead ends: 28 [2019-10-02 11:23:54,107 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-02 11:23:54,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-02 11:23:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-10-02 11:23:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-02 11:23:54,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-02 11:23:54,115 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 18 [2019-10-02 11:23:54,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:54,116 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-02 11:23:54,116 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 11:23:54,116 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-02 11:23:54,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-02 11:23:54,117 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:54,117 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:54,118 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:54,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:54,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1415691032, now seen corresponding path program 1 times [2019-10-02 11:23:54,118 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:54,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:54,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:54,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:54,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-02 11:23:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-02 11:23:54,176 INFO L478 BasicCegarLoop]: Counterexample might be feasible [2019-10-02 11:23:54,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:23:54 BoogieIcfgContainer [2019-10-02 11:23:54,207 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-02 11:23:54,211 INFO L168 Benchmark]: Toolchain (without parser) took 1804.76 ms. Allocated memory was 129.5 MB in the beginning and 197.7 MB in the end (delta: 68.2 MB). Free memory was 85.1 MB in the beginning and 93.9 MB in the end (delta: -8.8 MB). Peak memory consumption was 59.3 MB. Max. memory is 7.1 GB. [2019-10-02 11:23:54,212 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 129.5 MB. Free memory was 103.8 MB in the beginning and 103.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-10-02 11:23:54,214 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.82 ms. Allocated memory is still 129.5 MB. Free memory was 84.9 MB in the beginning and 75.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-10-02 11:23:54,217 INFO L168 Benchmark]: Boogie Preprocessor took 125.23 ms. Allocated memory was 129.5 MB in the beginning and 197.7 MB in the end (delta: 68.2 MB). Free memory was 75.4 MB in the beginning and 173.8 MB in the end (delta: -98.4 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2019-10-02 11:23:54,218 INFO L168 Benchmark]: RCFGBuilder took 268.91 ms. Allocated memory is still 197.7 MB. Free memory was 173.8 MB in the beginning and 161.1 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2019-10-02 11:23:54,220 INFO L168 Benchmark]: TraceAbstraction took 1078.88 ms. Allocated memory is still 197.7 MB. Free memory was 161.1 MB in the beginning and 93.9 MB in the end (delta: 67.2 MB). Peak memory consumption was 67.2 MB. Max. memory is 7.1 GB. [2019-10-02 11:23:54,230 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 129.5 MB. Free memory was 103.8 MB in the beginning and 103.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 323.82 ms. Allocated memory is still 129.5 MB. Free memory was 84.9 MB in the beginning and 75.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.23 ms. Allocated memory was 129.5 MB in the beginning and 197.7 MB in the end (delta: 68.2 MB). Free memory was 75.4 MB in the beginning and 173.8 MB in the end (delta: -98.4 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 268.91 ms. Allocated memory is still 197.7 MB. Free memory was 173.8 MB in the beginning and 161.1 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1078.88 ms. Allocated memory is still 197.7 MB. Free memory was 161.1 MB in the beginning and 93.9 MB in the end (delta: 67.2 MB). Peak memory consumption was 67.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int i=0, x=0, y=0; [L15] int n=__VERIFIER_nondet_int(); [L16] COND FALSE !(!(n>0)) [L17] i=0 VAL [i=0, n=1, x=0, y=0] [L17] COND TRUE i