/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/recursive/BallRajamani-SPIN2000-Fig1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:58:10,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:58:10,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:58:10,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:58:10,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:58:10,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:58:10,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:58:10,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:58:10,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:58:10,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:58:10,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:58:10,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:58:10,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:58:10,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:58:10,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:58:10,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:58:10,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:58:10,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:58:10,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:58:10,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:58:10,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:58:10,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:58:10,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:58:10,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:58:10,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:58:10,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:58:10,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:58:10,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:58:10,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:58:10,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:58:10,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:58:10,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:58:10,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:58:10,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:58:10,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:58:10,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:58:10,435 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:58:10,490 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:58:10,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:58:10,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:58:10,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:58:10,494 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:58:10,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:58:10,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:58:10,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:58:10,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:58:10,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:58:10,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:58:10,497 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:58:10,497 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:58:10,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:58:10,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:58:10,498 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:58:10,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:58:10,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:58:10,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:58:10,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:58:10,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:58:10,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:58:10,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:58:10,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:58:10,499 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:58:10,500 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:58:10,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:58:10,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:58:10,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:58:10,943 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:58:10,944 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:58:10,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2020-12-22 06:58:11,036 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f20d09bd5/3906f05862644a28b42e3ecb38d21a89/FLAG07eb572de [2020-12-22 06:58:11,684 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:58:11,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2020-12-22 06:58:11,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f20d09bd5/3906f05862644a28b42e3ecb38d21a89/FLAG07eb572de [2020-12-22 06:58:12,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f20d09bd5/3906f05862644a28b42e3ecb38d21a89 [2020-12-22 06:58:12,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:58:12,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:58:12,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:58:12,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:58:12,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:58:12,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:58:12" (1/1) ... [2020-12-22 06:58:12,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c5b42a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:12, skipping insertion in model container [2020-12-22 06:58:12,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:58:12" (1/1) ... [2020-12-22 06:58:12,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:58:12,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:58:12,253 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/recursive/BallRajamani-SPIN2000-Fig1.c[718,731] [2020-12-22 06:58:12,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:58:12,268 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:58:12,283 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/recursive/BallRajamani-SPIN2000-Fig1.c[718,731] [2020-12-22 06:58:12,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:58:12,300 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:58:12,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:12 WrapperNode [2020-12-22 06:58:12,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:58:12,302 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:58:12,302 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:58:12,302 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:58:12,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:12" (1/1) ... [2020-12-22 06:58:12,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:12" (1/1) ... [2020-12-22 06:58:12,336 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:58:12,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:58:12,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:58:12,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:58:12,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:12" (1/1) ... [2020-12-22 06:58:12,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:12" (1/1) ... [2020-12-22 06:58:12,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:12" (1/1) ... [2020-12-22 06:58:12,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:12" (1/1) ... [2020-12-22 06:58:12,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:12" (1/1) ... [2020-12-22 06:58:12,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:12" (1/1) ... [2020-12-22 06:58:12,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:12" (1/1) ... [2020-12-22 06:58:12,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:58:12,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:58:12,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:58:12,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:58:12,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:12" (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 06:58:12,453 INFO L130 BoogieDeclarations]: Found specification of procedure A [2020-12-22 06:58:12,453 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2020-12-22 06:58:12,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:58:12,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:58:12,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:58:12,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:58:12,682 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:58:12,683 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 06:58:12,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:58:12 BoogieIcfgContainer [2020-12-22 06:58:12,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:58:12,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:58:12,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:58:12,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:58:12,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:58:12" (1/3) ... [2020-12-22 06:58:12,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40714666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:58:12, skipping insertion in model container [2020-12-22 06:58:12,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:12" (2/3) ... [2020-12-22 06:58:12,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40714666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:58:12, skipping insertion in model container [2020-12-22 06:58:12,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:58:12" (3/3) ... [2020-12-22 06:58:12,696 INFO L111 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2020-12-22 06:58:12,703 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:58:12,709 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 06:58:12,733 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 06:58:12,791 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:58:12,792 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:58:12,792 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:58:12,792 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:58:12,792 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:58:12,792 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:58:12,793 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:58:12,793 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:58:12,811 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-22 06:58:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 06:58:12,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:12,819 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:12,819 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:12,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:12,826 INFO L82 PathProgramCache]: Analyzing trace with hash -103722487, now seen corresponding path program 1 times [2020-12-22 06:58:12,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:12,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46006733] [2020-12-22 06:58:12,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:13,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 06:58:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:13,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 06:58:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 06:58:13,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46006733] [2020-12-22 06:58:13,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777520387] [2020-12-22 06:58:13,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:13,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 06:58:13,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 06:58:13,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:13,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2020-12-22 06:58:13,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116535724] [2020-12-22 06:58:13,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:58:13,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:13,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:58:13,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:58:13,455 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 6 states. [2020-12-22 06:58:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:13,634 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-12-22 06:58:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:58:13,636 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-22 06:58:13,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:13,645 INFO L225 Difference]: With dead ends: 39 [2020-12-22 06:58:13,646 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 06:58:13,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-22 06:58:13,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 06:58:13,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-22 06:58:13,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 06:58:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-22 06:58:13,692 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 16 [2020-12-22 06:58:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:13,692 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-22 06:58:13,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:58:13,693 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-22 06:58:13,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 06:58:13,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:13,695 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:13,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-22 06:58:13,909 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:13,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:13,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1835094219, now seen corresponding path program 1 times [2020-12-22 06:58:13,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:13,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123670314] [2020-12-22 06:58:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 06:58:13,949 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 06:58:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 06:58:13,997 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 06:58:14,022 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 06:58:14,023 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 06:58:14,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:58:14,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 06:58:14 BoogieIcfgContainer [2020-12-22 06:58:14,075 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 06:58:14,076 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 06:58:14,076 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 06:58:14,076 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 06:58:14,077 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:58:12" (3/4) ... [2020-12-22 06:58:14,080 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 06:58:14,148 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive/BallRajamani-SPIN2000-Fig1.c-witness.graphml [2020-12-22 06:58:14,149 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 06:58:14,154 INFO L168 Benchmark]: Toolchain (without parser) took 2078.08 ms. Allocated memory is still 156.2 MB. Free memory was 130.8 MB in the beginning and 89.4 MB in the end (delta: 41.3 MB). Peak memory consumption was 41.2 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:14,155 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 156.2 MB. Free memory is still 127.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 06:58:14,158 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.58 ms. Allocated memory is still 156.2 MB. Free memory was 130.5 MB in the beginning and 121.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:14,158 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.30 ms. Allocated memory is still 156.2 MB. Free memory was 121.3 MB in the beginning and 120.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:14,159 INFO L168 Benchmark]: Boogie Preprocessor took 19.37 ms. Allocated memory is still 156.2 MB. Free memory was 120.0 MB in the beginning and 119.1 MB in the end (delta: 898.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 06:58:14,160 INFO L168 Benchmark]: RCFGBuilder took 328.36 ms. Allocated memory is still 156.2 MB. Free memory was 118.9 MB in the beginning and 107.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:14,163 INFO L168 Benchmark]: TraceAbstraction took 1387.96 ms. Allocated memory is still 156.2 MB. Free memory was 106.8 MB in the beginning and 92.1 MB in the end (delta: 14.8 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:14,164 INFO L168 Benchmark]: Witness Printer took 72.79 ms. Allocated memory is still 156.2 MB. Free memory was 92.1 MB in the beginning and 89.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:14,170 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 156.2 MB. Free memory is still 127.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 224.58 ms. Allocated memory is still 156.2 MB. Free memory was 130.5 MB in the beginning and 121.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 34.30 ms. Allocated memory is still 156.2 MB. Free memory was 121.3 MB in the beginning and 120.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.37 ms. Allocated memory is still 156.2 MB. Free memory was 120.0 MB in the beginning and 119.1 MB in the end (delta: 898.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 328.36 ms. Allocated memory is still 156.2 MB. Free memory was 118.9 MB in the beginning and 107.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1387.96 ms. Allocated memory is still 156.2 MB. Free memory was 106.8 MB in the beginning and 92.1 MB in the end (delta: 14.8 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. * Witness Printer took 72.79 ms. Allocated memory is still 156.2 MB. Free memory was 92.1 MB in the beginning and 89.4 MB in the end (delta: 2.6 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: 33]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int g; VAL [g=0] [L28] int g = __VERIFIER_nondet_int(); [L29] int h = !g; VAL [g=0] [L30] CALL A(g,h) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=0, g=0] [L19] COND TRUE \read(a1) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=0, a1=-1, a2=0, g=0] [L20] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=-1, \old(g)=0, g=0] [L19] COND FALSE !(\read(a1)) [L22] g = a2 VAL [\old(a1)=0, \old(a2)=-1, \old(g)=0, a1=0, a2=-1, g=-1] [L20] RET A(a2,a1) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=0, A(a2,a1)=-2, a1=-1, a2=0, g=-1] [L30] RET A(g,h) VAL [g=-1] [L31] CALL A(g,h) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=-1, g=-1] [L19] COND TRUE \read(a1) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=-1, a1=-1, a2=0, g=-1] [L20] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=-1, \old(g)=-1, g=-1] [L19] COND FALSE !(\read(a1)) [L22] g = a2 VAL [\old(a1)=0, \old(a2)=-1, \old(g)=-1, a1=0, a2=-1, g=-1] [L20] RET A(a2,a1) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=-1, A(a2,a1)=-4, a1=-1, a2=0, g=-1] [L31] RET A(g,h) VAL [g=-1] [L32] COND TRUE \read(g) VAL [g=-1] [L33] reach_error() VAL [g=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 10 SDslu, 36 SDs, 0 SdLazy, 44 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 930 SizeOfPredicates, 1 NumberOfNonLiveVariables, 83 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 2 InterpolantComputations, 0 PerfectInterpolantSequences, 2/8 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...