/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-regression/alt_test.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:52:08,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:52:08,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:52:08,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 03:52:08,884 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:52:08,965 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:52:08,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:52:08,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:52:08,974 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:52:08,974 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:52:08,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:52:08,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:52:08,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:52:08,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:52:08,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:52:08,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:52:08,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:52:08,978 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:52:08,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:52:08,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:52:08,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:52:08,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:52:08,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:52:08,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:52:08,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:52:08,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:52:08,980 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:52:08,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:52:08,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:52:08,980 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:52:08,981 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:52:09,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:52:09,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:52:09,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:52:09,608 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:52:09,610 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:52:09,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/alt_test.i [2020-12-22 03:52:09,727 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54490d2e3/a3d9fc82ecb847abab28fce92f6bbd9b/FLAG2d7930675 [2020-12-22 03:52:10,661 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:52:10,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/alt_test.i [2020-12-22 03:52:10,697 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54490d2e3/a3d9fc82ecb847abab28fce92f6bbd9b/FLAG2d7930675 [2020-12-22 03:52:10,886 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54490d2e3/a3d9fc82ecb847abab28fce92f6bbd9b [2020-12-22 03:52:10,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:52:10,897 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:52:10,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:52:10,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:52:10,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:52:10,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:52:10" (1/1) ... [2020-12-22 03:52:10,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6de9a9fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:10, skipping insertion in model container [2020-12-22 03:52:10,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:52:10" (1/1) ... [2020-12-22 03:52:10,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:52:11,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:52:11,381 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/alt_test.i[22285,22298] [2020-12-22 03:52:11,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:52:11,415 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:52:11,463 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/alt_test.i[22285,22298] [2020-12-22 03:52:11,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:52:11,561 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:52:11,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:11 WrapperNode [2020-12-22 03:52:11,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:52:11,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:52:11,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:52:11,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:52:11,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:11" (1/1) ... [2020-12-22 03:52:11,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:11" (1/1) ... [2020-12-22 03:52:11,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:52:11,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:52:11,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:52:11,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:52:11,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:11" (1/1) ... [2020-12-22 03:52:11,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:11" (1/1) ... [2020-12-22 03:52:11,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:11" (1/1) ... [2020-12-22 03:52:11,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:11" (1/1) ... [2020-12-22 03:52:11,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:11" (1/1) ... [2020-12-22 03:52:11,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:11" (1/1) ... [2020-12-22 03:52:11,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:11" (1/1) ... [2020-12-22 03:52:11,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:52:11,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:52:11,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:52:11,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:52:11,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:11" (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 [2020-12-22 03:52:11,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 03:52:11,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:52:11,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 03:52:11,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:52:11,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:52:11,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:52:12,259 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:52:12,260 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-22 03:52:12,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:12 BoogieIcfgContainer [2020-12-22 03:52:12,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:52:12,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:52:12,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:52:12,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:52:12,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:52:10" (1/3) ... [2020-12-22 03:52:12,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ddc55c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:52:12, skipping insertion in model container [2020-12-22 03:52:12,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:11" (2/3) ... [2020-12-22 03:52:12,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ddc55c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:52:12, skipping insertion in model container [2020-12-22 03:52:12,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:12" (3/3) ... [2020-12-22 03:52:12,281 INFO L111 eAbstractionObserver]: Analyzing ICFG alt_test.i [2020-12-22 03:52:12,294 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:52:12,303 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 03:52:12,339 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 03:52:12,406 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:52:12,407 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:52:12,407 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:52:12,407 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:52:12,407 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:52:12,407 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:52:12,408 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:52:12,408 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:52:12,452 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-22 03:52:12,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 03:52:12,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:12,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:12,475 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:12,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:12,491 INFO L82 PathProgramCache]: Analyzing trace with hash 119352108, now seen corresponding path program 1 times [2020-12-22 03:52:12,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:12,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68310787] [2020-12-22 03:52:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:12,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68310787] [2020-12-22 03:52:12,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:12,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:52:12,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374284439] [2020-12-22 03:52:12,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:52:12,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:13,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:52:13,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:52:13,017 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2020-12-22 03:52:13,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:13,138 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-12-22 03:52:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:52:13,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-22 03:52:13,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:13,177 INFO L225 Difference]: With dead ends: 39 [2020-12-22 03:52:13,182 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 03:52:13,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:52:13,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 03:52:13,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-22 03:52:13,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 03:52:13,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-12-22 03:52:13,273 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 8 [2020-12-22 03:52:13,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:13,274 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-12-22 03:52:13,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:52:13,275 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-12-22 03:52:13,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 03:52:13,277 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:13,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:13,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:52:13,279 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:13,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:13,287 INFO L82 PathProgramCache]: Analyzing trace with hash 176610410, now seen corresponding path program 1 times [2020-12-22 03:52:13,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:13,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635858765] [2020-12-22 03:52:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:13,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635858765] [2020-12-22 03:52:13,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:13,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:52:13,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605181566] [2020-12-22 03:52:13,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:52:13,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:13,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:52:13,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:52:13,418 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 3 states. [2020-12-22 03:52:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:13,430 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-22 03:52:13,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:52:13,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-22 03:52:13,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:13,433 INFO L225 Difference]: With dead ends: 25 [2020-12-22 03:52:13,434 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 03:52:13,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:52:13,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 03:52:13,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 03:52:13,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 03:52:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-22 03:52:13,442 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2020-12-22 03:52:13,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:13,442 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-22 03:52:13,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:52:13,443 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-22 03:52:13,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 03:52:13,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:13,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:13,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:52:13,444 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:13,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:13,446 INFO L82 PathProgramCache]: Analyzing trace with hash -262109109, now seen corresponding path program 1 times [2020-12-22 03:52:13,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:13,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075685042] [2020-12-22 03:52:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:13,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075685042] [2020-12-22 03:52:13,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:13,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 03:52:13,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461759185] [2020-12-22 03:52:13,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:52:13,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:13,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:52:13,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:52:13,559 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-12-22 03:52:13,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:13,686 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2020-12-22 03:52:13,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:52:13,688 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-22 03:52:13,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:13,690 INFO L225 Difference]: With dead ends: 19 [2020-12-22 03:52:13,692 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 03:52:13,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:52:13,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 03:52:13,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 03:52:13,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 03:52:13,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 12 transitions. [2020-12-22 03:52:13,718 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 12 transitions. Word has length 11 [2020-12-22 03:52:13,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:13,719 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 12 transitions. [2020-12-22 03:52:13,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:52:13,720 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 12 transitions. [2020-12-22 03:52:13,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 03:52:13,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:13,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:13,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 03:52:13,724 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:13,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:13,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1912419270, now seen corresponding path program 1 times [2020-12-22 03:52:13,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:13,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640597272] [2020-12-22 03:52:13,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:52:13,806 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:52:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:52:13,851 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:52:13,889 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:52:13,889 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:52:13,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 03:52:13,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:52:13 BoogieIcfgContainer [2020-12-22 03:52:13,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:52:13,948 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:52:13,949 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:52:13,949 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:52:13,950 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:12" (3/4) ... [2020-12-22 03:52:13,955 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 03:52:14,086 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/alt_test.i-witness.graphml [2020-12-22 03:52:14,087 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:52:14,093 INFO L168 Benchmark]: Toolchain (without parser) took 3192.82 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 78.4 MB in the end (delta: 47.4 MB). Peak memory consumption was 49.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:14,094 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 151.0 MB. Free memory is still 122.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:52:14,098 INFO L168 Benchmark]: CACSL2BoogieTranslator took 663.39 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 104.9 MB in the end (delta: 20.8 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:14,099 INFO L168 Benchmark]: Boogie Procedure Inliner took 91.68 ms. Allocated memory is still 151.0 MB. Free memory was 104.7 MB in the beginning and 103.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:14,100 INFO L168 Benchmark]: Boogie Preprocessor took 34.85 ms. Allocated memory is still 151.0 MB. Free memory was 103.1 MB in the beginning and 101.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:14,103 INFO L168 Benchmark]: RCFGBuilder took 569.61 ms. Allocated memory is still 151.0 MB. Free memory was 101.7 MB in the beginning and 121.3 MB in the end (delta: -19.6 MB). Peak memory consumption was 8.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:14,105 INFO L168 Benchmark]: TraceAbstraction took 1680.39 ms. Allocated memory is still 151.0 MB. Free memory was 120.9 MB in the beginning and 80.5 MB in the end (delta: 40.4 MB). Peak memory consumption was 40.9 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:14,121 INFO L168 Benchmark]: Witness Printer took 138.78 ms. Allocated memory is still 151.0 MB. Free memory was 80.5 MB in the beginning and 78.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:14,132 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 151.0 MB. Free memory is still 122.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 663.39 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 104.9 MB in the end (delta: 20.8 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 91.68 ms. Allocated memory is still 151.0 MB. Free memory was 104.7 MB in the beginning and 103.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.85 ms. Allocated memory is still 151.0 MB. Free memory was 103.1 MB in the beginning and 101.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 569.61 ms. Allocated memory is still 151.0 MB. Free memory was 101.7 MB in the beginning and 121.3 MB in the end (delta: -19.6 MB). Peak memory consumption was 8.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1680.39 ms. Allocated memory is still 151.0 MB. Free memory was 120.9 MB in the beginning and 80.5 MB in the end (delta: 40.4 MB). Peak memory consumption was 40.9 MB. Max. memory is 8.0 GB. * Witness Printer took 138.78 ms. Allocated memory is still 151.0 MB. Free memory was 80.5 MB in the beginning and 78.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 516]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L518] int globalState = 0; VAL [globalState=0] [L529] void *retVal = malloc(size); VAL [globalState=0] [L530] COND TRUE retVal != ((void *)0) [L531] globalState=1 VAL [globalState=1] [L532] return retVal; VAL [globalState=1] [L523] int *a = (int*) l_malloc(sizeof(int)); [L535] COND TRUE ptr!=((void *)0) VAL [globalState=1] [L535] (globalState == 1) ? (0) : __blast_assert () VAL [globalState=1] [L536] globalState = 0 [L535] COND TRUE ptr!=((void *)0) VAL [globalState=0] [L535] (globalState == 1) ? (0) : __blast_assert () VAL [globalState=0] [L516] reach_error() VAL [globalState=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 33 SDslu, 21 SDs, 0 SdLazy, 20 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 395 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...