/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=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gcnr2008.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:14:39,348 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 21:14:39,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:14:39,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:14:39,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:14:39,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:14:39,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:14:39,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:14:39,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:14:39,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:14:39,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:14:39,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:14:39,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:14:39,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:14:39,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 21:14:39,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:14:39,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:14:39,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:14:39,409 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 21:14:39,432 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:14:39,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:14:39,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:14:39,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:14:39,437 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:14:39,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:14:39,438 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:14:39,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:14:39,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:14:39,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:14:39,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:14:39,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:14:39,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:14:39,439 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:14:39,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:14:39,439 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:14:39,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:14:39,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:14:39,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:14:39,442 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:14:39,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:14:39,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:14:39,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:14:39,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:14:39,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:14:39,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:14:39,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:14:39,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:14:39,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:14:39,444 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=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:14:39,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:14:39,781 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:14:39,787 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:14:39,789 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:14:39,790 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:14:39,792 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gcnr2008.i [2020-08-18 21:14:39,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b2fff6b5/ab9321981a324080b7178aa476100f96/FLAG63464f0fb [2020-08-18 21:14:40,317 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:14:40,318 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gcnr2008.i [2020-08-18 21:14:40,325 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b2fff6b5/ab9321981a324080b7178aa476100f96/FLAG63464f0fb [2020-08-18 21:14:40,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b2fff6b5/ab9321981a324080b7178aa476100f96 [2020-08-18 21:14:40,691 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:14:40,694 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:14:40,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:14:40,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:14:40,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:14:40,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:14:40" (1/1) ... [2020-08-18 21:14:40,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b4ad157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:40, skipping insertion in model container [2020-08-18 21:14:40,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:14:40" (1/1) ... [2020-08-18 21:14:40,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:14:40,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:14:40,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:14:40,959 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:14:40,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:14:40,987 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:14:40,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:40 WrapperNode [2020-08-18 21:14:40,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:14:40,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:14:40,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:14:40,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:14:41,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:40" (1/1) ... [2020-08-18 21:14:41,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:40" (1/1) ... [2020-08-18 21:14:41,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:40" (1/1) ... [2020-08-18 21:14:41,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:40" (1/1) ... [2020-08-18 21:14:41,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:40" (1/1) ... [2020-08-18 21:14:41,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:40" (1/1) ... [2020-08-18 21:14:41,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:40" (1/1) ... [2020-08-18 21:14:41,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:14:41,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:14:41,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:14:41,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:14:41,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:40" (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 21:14:41,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:14:41,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:14:41,155 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 21:14:41,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 21:14:41,156 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:14:41,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:14:41,156 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 21:14:41,156 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 21:14:41,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 21:14:41,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:14:41,157 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:14:41,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:14:41,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:14:41,383 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:14:41,383 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 21:14:41,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:14:41 BoogieIcfgContainer [2020-08-18 21:14:41,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:14:41,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:14:41,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:14:41,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:14:41,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:14:40" (1/3) ... [2020-08-18 21:14:41,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7632bf71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:14:41, skipping insertion in model container [2020-08-18 21:14:41,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:40" (2/3) ... [2020-08-18 21:14:41,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7632bf71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:14:41, skipping insertion in model container [2020-08-18 21:14:41,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:14:41" (3/3) ... [2020-08-18 21:14:41,396 INFO L109 eAbstractionObserver]: Analyzing ICFG gcnr2008.i [2020-08-18 21:14:41,408 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:14:41,416 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:14:41,433 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:14:41,466 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:14:41,466 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:14:41,467 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:14:41,467 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:14:41,467 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:14:41,467 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:14:41,467 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:14:41,468 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:14:41,491 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-18 21:14:41,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 21:14:41,499 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:14:41,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:14:41,501 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:14:41,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:14:41,510 INFO L82 PathProgramCache]: Analyzing trace with hash 820478905, now seen corresponding path program 1 times [2020-08-18 21:14:41,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:14:41,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989866516] [2020-08-18 21:14:41,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:14:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:41,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:14:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:41,657 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 21:14:41,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989866516] [2020-08-18 21:14:41,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:14:41,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 21:14:41,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623538673] [2020-08-18 21:14:41,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 21:14:41,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:14:41,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 21:14:41,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 21:14:41,684 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-08-18 21:14:41,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:14:41,710 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-08-18 21:14:41,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 21:14:41,712 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-18 21:14:41,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:14:41,723 INFO L225 Difference]: With dead ends: 36 [2020-08-18 21:14:41,723 INFO L226 Difference]: Without dead ends: 17 [2020-08-18 21:14:41,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 21:14:41,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-08-18 21:14:41,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-08-18 21:14:41,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-18 21:14:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-08-18 21:14:41,770 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2020-08-18 21:14:41,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:14:41,771 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-08-18 21:14:41,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 21:14:41,771 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-08-18 21:14:41,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 21:14:41,772 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:14:41,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:14:41,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:14:41,773 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:14:41,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:14:41,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1236793761, now seen corresponding path program 1 times [2020-08-18 21:14:41,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:14:41,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719998235] [2020-08-18 21:14:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:14:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 21:14:41,811 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 21:14:41,811 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 21:14:41,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:14:41,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:14:41 BoogieIcfgContainer [2020-08-18 21:14:41,833 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:14:41,836 INFO L168 Benchmark]: Toolchain (without parser) took 1141.51 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 103.7 MB in the beginning and 145.9 MB in the end (delta: -42.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-08-18 21:14:41,837 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-18 21:14:41,838 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.08 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 93.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:14:41,840 INFO L168 Benchmark]: Boogie Preprocessor took 110.23 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.7 MB in the beginning and 181.4 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:14:41,841 INFO L168 Benchmark]: RCFGBuilder took 288.51 ms. Allocated memory is still 202.9 MB. Free memory was 181.4 MB in the beginning and 167.9 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-08-18 21:14:41,842 INFO L168 Benchmark]: TraceAbstraction took 444.77 ms. Allocated memory is still 202.9 MB. Free memory was 166.9 MB in the beginning and 145.9 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2020-08-18 21:14:41,849 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 292.08 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 93.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.23 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.7 MB in the beginning and 181.4 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 288.51 ms. Allocated memory is still 202.9 MB. Free memory was 181.4 MB in the beginning and 167.9 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 444.77 ms. Allocated memory is still 202.9 MB. Free memory was 166.9 MB in the beginning and 145.9 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int x,y,z,w; [L15] EXPR w = 0 [L15] EXPR z = w = 0 [L15] EXPR y = z = w = 0 [L15] x = y = z = w = 0 [L16] COND FALSE !(__VERIFIER_nondet_int() && y < 10000) [L31] CALL __VERIFIER_assert(x >= 4 && y <= 2) [L7] COND TRUE !(cond) [L8] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 0.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...