/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/test28-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:52:56,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:52:56,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:52:56,666 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 03:52:56,755 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:52:56,784 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:52:56,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:52:56,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:52:56,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:52:56,787 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:52:56,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:52:56,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:52:56,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:52:56,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:52:56,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:52:56,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:52:56,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:52:56,789 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:52:56,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:52:56,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:52:56,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:52:56,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:52:56,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:52:56,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:52:56,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:52:56,792 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:52:56,792 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:52:56,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:52:56,793 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:52:56,793 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:52:56,793 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:52:57,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:52:57,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:52:57,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:52:57,240 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:52:57,245 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:52:57,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test28-1.c [2020-12-22 03:52:57,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17a6a2dc4/d2bc9b3e27ba49a797cefe944cb69207/FLAGf61f000d2 [2020-12-22 03:52:58,014 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:52:58,015 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test28-1.c [2020-12-22 03:52:58,025 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17a6a2dc4/d2bc9b3e27ba49a797cefe944cb69207/FLAGf61f000d2 [2020-12-22 03:52:58,398 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17a6a2dc4/d2bc9b3e27ba49a797cefe944cb69207 [2020-12-22 03:52:58,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:52:58,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:52:58,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:52:58,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:52:58,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:52:58,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:52:58" (1/1) ... [2020-12-22 03:52:58,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a1709e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:58, skipping insertion in model container [2020-12-22 03:52:58,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:52:58" (1/1) ... [2020-12-22 03:52:58,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:52:58,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:52:58,752 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/test28-1.c[576,589] [2020-12-22 03:52:58,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:52:58,772 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:52:58,794 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/test28-1.c[576,589] [2020-12-22 03:52:58,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:52:58,816 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:52:58,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:58 WrapperNode [2020-12-22 03:52:58,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:52:58,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:52:58,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:52:58,820 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:52:58,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:58" (1/1) ... [2020-12-22 03:52:58,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:58" (1/1) ... [2020-12-22 03:52:58,866 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:52:58,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:52:58,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:52:58,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:52:58,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:58" (1/1) ... [2020-12-22 03:52:58,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:58" (1/1) ... [2020-12-22 03:52:58,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:58" (1/1) ... [2020-12-22 03:52:58,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:58" (1/1) ... [2020-12-22 03:52:58,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:58" (1/1) ... [2020-12-22 03:52:58,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:58" (1/1) ... [2020-12-22 03:52:58,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:58" (1/1) ... [2020-12-22 03:52:58,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:52:58,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:52:58,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:52:58,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:52:58,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:58" (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 03:52:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 03:52:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:52:59,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:52:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 03:52:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:52:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:52:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 03:52:59,341 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:52:59,341 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 03:52:59,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:59 BoogieIcfgContainer [2020-12-22 03:52:59,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:52:59,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:52:59,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:52:59,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:52:59,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:52:58" (1/3) ... [2020-12-22 03:52:59,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2585afd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:52:59, skipping insertion in model container [2020-12-22 03:52:59,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:58" (2/3) ... [2020-12-22 03:52:59,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2585afd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:52:59, skipping insertion in model container [2020-12-22 03:52:59,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:59" (3/3) ... [2020-12-22 03:52:59,385 INFO L111 eAbstractionObserver]: Analyzing ICFG test28-1.c [2020-12-22 03:52:59,401 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:52:59,416 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:52:59,489 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:52:59,542 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:52:59,544 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:52:59,544 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:52:59,545 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:52:59,550 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:52:59,550 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:52:59,550 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:52:59,550 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:52:59,567 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-22 03:52:59,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 03:52:59,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:59,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:59,575 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:59,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:59,583 INFO L82 PathProgramCache]: Analyzing trace with hash -594068692, now seen corresponding path program 1 times [2020-12-22 03:52:59,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:59,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409127495] [2020-12-22 03:52:59,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:59,896 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 03:52:59,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409127495] [2020-12-22 03:52:59,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:59,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 03:52:59,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945677290] [2020-12-22 03:52:59,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:52:59,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:59,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:52:59,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:52:59,941 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 5 states. [2020-12-22 03:53:00,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:00,162 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2020-12-22 03:53:00,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:53:00,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-22 03:53:00,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:00,187 INFO L225 Difference]: With dead ends: 28 [2020-12-22 03:53:00,187 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 03:53:00,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:53:00,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 03:53:00,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2020-12-22 03:53:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 03:53:00,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-22 03:53:00,245 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2020-12-22 03:53:00,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:00,246 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-22 03:53:00,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:53:00,246 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-22 03:53:00,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 03:53:00,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:53:00,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:53:00,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:53:00,251 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:53:00,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:53:00,256 INFO L82 PathProgramCache]: Analyzing trace with hash -592221650, now seen corresponding path program 1 times [2020-12-22 03:53:00,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:53:00,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543597599] [2020-12-22 03:53:00,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:53:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:53:00,464 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 03:53:00,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543597599] [2020-12-22 03:53:00,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:53:00,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 03:53:00,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161763497] [2020-12-22 03:53:00,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 03:53:00,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:53:00,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 03:53:00,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:53:00,474 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2020-12-22 03:53:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:00,626 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-12-22 03:53:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 03:53:00,626 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-22 03:53:00,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:00,627 INFO L225 Difference]: With dead ends: 19 [2020-12-22 03:53:00,627 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 03:53:00,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-12-22 03:53:00,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 03:53:00,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 03:53:00,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 03:53:00,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 9 transitions. [2020-12-22 03:53:00,633 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 9 transitions. Word has length 9 [2020-12-22 03:53:00,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:00,633 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 9 transitions. [2020-12-22 03:53:00,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 03:53:00,634 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 9 transitions. [2020-12-22 03:53:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 03:53:00,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:53:00,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:53:00,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:53:00,635 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:53:00,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:53:00,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1180938670, now seen corresponding path program 1 times [2020-12-22 03:53:00,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:53:00,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958500337] [2020-12-22 03:53:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:53:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:53:00,659 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:53:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:53:00,679 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:53:00,716 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:53:00,716 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:53:00,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 03:53:00,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:53:00 BoogieIcfgContainer [2020-12-22 03:53:00,751 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:53:00,752 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:53:00,752 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:53:00,753 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:53:00,753 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:59" (3/4) ... [2020-12-22 03:53:00,757 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 03:53:00,817 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/test28-1.c-witness.graphml [2020-12-22 03:53:00,818 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:53:00,821 INFO L168 Benchmark]: Toolchain (without parser) took 2411.93 ms. Allocated memory is still 154.1 MB. Free memory was 129.0 MB in the beginning and 85.0 MB in the end (delta: 44.0 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:00,822 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 154.1 MB. Free memory is still 126.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:53:00,823 INFO L168 Benchmark]: CACSL2BoogieTranslator took 404.66 ms. Allocated memory is still 154.1 MB. Free memory was 128.6 MB in the beginning and 119.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:00,824 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.85 ms. Allocated memory is still 154.1 MB. Free memory was 119.4 MB in the beginning and 118.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:00,824 INFO L168 Benchmark]: Boogie Preprocessor took 35.50 ms. Allocated memory is still 154.1 MB. Free memory was 118.0 MB in the beginning and 116.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:00,825 INFO L168 Benchmark]: RCFGBuilder took 444.00 ms. Allocated memory is still 154.1 MB. Free memory was 116.9 MB in the beginning and 104.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:00,826 INFO L168 Benchmark]: TraceAbstraction took 1381.25 ms. Allocated memory is still 154.1 MB. Free memory was 136.9 MB in the beginning and 87.1 MB in the end (delta: 49.8 MB). Peak memory consumption was 48.2 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:00,827 INFO L168 Benchmark]: Witness Printer took 65.58 ms. Allocated memory is still 154.1 MB. Free memory was 87.1 MB in the beginning and 85.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:00,832 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 154.1 MB. Free memory is still 126.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 404.66 ms. Allocated memory is still 154.1 MB. Free memory was 128.6 MB in the beginning and 119.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 46.85 ms. Allocated memory is still 154.1 MB. Free memory was 119.4 MB in the beginning and 118.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.50 ms. Allocated memory is still 154.1 MB. Free memory was 118.0 MB in the beginning and 116.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 444.00 ms. Allocated memory is still 154.1 MB. Free memory was 116.9 MB in the beginning and 104.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1381.25 ms. Allocated memory is still 154.1 MB. Free memory was 136.9 MB in the beginning and 87.1 MB in the end (delta: 49.8 MB). Peak memory consumption was 48.2 MB. Max. memory is 8.0 GB. * Witness Printer took 65.58 ms. Allocated memory is still 154.1 MB. Free memory was 87.1 MB in the beginning and 85.0 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: 28]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] struct dummy d1, d2; [L15] int n = __VERIFIER_nondet_int(); [L16] EXPR n ? &d1 : &d2 [L16] struct dummy *pd = n ? &d1 : &d2; [L17] COND TRUE pd == &d2 [L18] pd->a = 0 [L22] pd == &d2 && d2.b != 0 [L22] EXPR d2.b [L22] pd == &d2 && d2.b != 0 [L22] COND TRUE pd == &d2 && d2.b != 0 [L28] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 45 SDslu, 26 SDs, 0 SdLazy, 60 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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, 2 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 280 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...