/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 17:57:44,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 17:57:44,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 17:57:44,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 17:57:44,837 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 17:57:44,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 17:57:44,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 17:57:44,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 17:57:44,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 17:57:44,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 17:57:44,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 17:57:44,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 17:57:44,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 17:57:44,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 17:57:44,853 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 17:57:44,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 17:57:44,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 17:57:44,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 17:57:44,859 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 17:57:44,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 17:57:44,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 17:57:44,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 17:57:44,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 17:57:44,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 17:57:44,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 17:57:44,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 17:57:44,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 17:57:44,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 17:57:44,922 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 17:57:44,976 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 17:57:44,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 17:57:44,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 17:57:44,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 17:57:44,981 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 17:57:44,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 17:57:44,981 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 17:57:44,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 17:57:44,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 17:57:44,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 17:57:44,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 17:57:44,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 17:57:44,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 17:57:44,984 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 17:57:44,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 17:57:44,984 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 17:57:44,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 17:57:44,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 17:57:44,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 17:57:44,985 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 17:57:44,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 17:57:44,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 17:57:44,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 17:57:44,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 17:57:44,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 17:57:44,987 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 17:57:44,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 17:57:44,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 17:57:44,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 17:57:44,988 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 17:57:45,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 17:57:45,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 17:57:45,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 17:57:45,460 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 17:57:45,464 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 17:57:45,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-10-23 17:57:45,562 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6d720d7d/3ab8bd5e4ad0432dbd0657152f05a7e7/FLAG7651f4706 [2020-10-23 17:57:46,262 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 17:57:46,263 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-10-23 17:57:46,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6d720d7d/3ab8bd5e4ad0432dbd0657152f05a7e7/FLAG7651f4706 [2020-10-23 17:57:46,636 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6d720d7d/3ab8bd5e4ad0432dbd0657152f05a7e7 [2020-10-23 17:57:46,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 17:57:46,648 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 17:57:46,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 17:57:46,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 17:57:46,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 17:57:46,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:57:46" (1/1) ... [2020-10-23 17:57:46,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33836534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:46, skipping insertion in model container [2020-10-23 17:57:46,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:57:46" (1/1) ... [2020-10-23 17:57:46,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 17:57:46,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 17:57:46,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:57:46,879 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 17:57:46,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:57:46,914 INFO L208 MainTranslator]: Completed translation [2020-10-23 17:57:46,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:46 WrapperNode [2020-10-23 17:57:46,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 17:57:46,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 17:57:46,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 17:57:46,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 17:57:46,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:46" (1/1) ... [2020-10-23 17:57:46,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:46" (1/1) ... [2020-10-23 17:57:46,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:46" (1/1) ... [2020-10-23 17:57:46,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:46" (1/1) ... [2020-10-23 17:57:46,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:46" (1/1) ... [2020-10-23 17:57:46,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:46" (1/1) ... [2020-10-23 17:57:46,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:46" (1/1) ... [2020-10-23 17:57:46,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 17:57:46,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 17:57:46,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 17:57:46,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 17:57:46,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:46" (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 [2020-10-23 17:57:47,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 17:57:47,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 17:57:47,077 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 17:57:47,078 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2020-10-23 17:57:47,078 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 17:57:47,079 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 17:57:47,080 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 17:57:47,080 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 17:57:47,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 17:57:47,081 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 17:57:47,081 INFO L130 BoogieDeclarations]: Found specification of procedure A [2020-10-23 17:57:47,082 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 17:57:47,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 17:57:47,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 17:57:47,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 17:57:47,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 17:57:47,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 17:57:47,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 17:57:47,627 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 17:57:47,627 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 17:57:47,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:57:47 BoogieIcfgContainer [2020-10-23 17:57:47,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 17:57:47,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 17:57:47,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 17:57:47,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 17:57:47,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:57:46" (1/3) ... [2020-10-23 17:57:47,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55cbda23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:57:47, skipping insertion in model container [2020-10-23 17:57:47,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:46" (2/3) ... [2020-10-23 17:57:47,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55cbda23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:57:47, skipping insertion in model container [2020-10-23 17:57:47,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:57:47" (3/3) ... [2020-10-23 17:57:47,646 INFO L111 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2020-10-23 17:57:47,660 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 17:57:47,665 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 17:57:47,689 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 17:57:47,737 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 17:57:47,737 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 17:57:47,738 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 17:57:47,738 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 17:57:47,738 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 17:57:47,738 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 17:57:47,738 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 17:57:47,738 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 17:57:47,763 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-23 17:57:47,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 17:57:47,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:47,775 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:47,775 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:47,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:47,785 INFO L82 PathProgramCache]: Analyzing trace with hash 394687314, now seen corresponding path program 1 times [2020-10-23 17:57:47,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:47,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643133317] [2020-10-23 17:57:47,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:48,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:48,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:48,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 17:57:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 17:57:48,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643133317] [2020-10-23 17:57:48,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214267807] [2020-10-23 17:57:48,254 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 [2020-10-23 17:57:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:48,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-23 17:57:48,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 17:57:48,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:48,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2020-10-23 17:57:48,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160775548] [2020-10-23 17:57:48,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 17:57:48,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:48,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 17:57:48,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 17:57:48,398 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-10-23 17:57:48,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:48,740 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2020-10-23 17:57:48,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 17:57:48,742 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-23 17:57:48,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:48,752 INFO L225 Difference]: With dead ends: 50 [2020-10-23 17:57:48,752 INFO L226 Difference]: Without dead ends: 22 [2020-10-23 17:57:48,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-23 17:57:48,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-23 17:57:48,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-23 17:57:48,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-23 17:57:48,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-23 17:57:48,807 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 21 [2020-10-23 17:57:48,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:48,807 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-23 17:57:48,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 17:57:48,808 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-23 17:57:48,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 17:57:48,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:48,810 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:49,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-10-23 17:57:49,024 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:49,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:49,027 INFO L82 PathProgramCache]: Analyzing trace with hash 208947422, now seen corresponding path program 1 times [2020-10-23 17:57:49,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:49,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981890268] [2020-10-23 17:57:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 17:57:49,060 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 17:57:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 17:57:49,089 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 17:57:49,119 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 17:57:49,120 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 17:57:49,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 17:57:49,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 05:57:49 BoogieIcfgContainer [2020-10-23 17:57:49,170 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 17:57:49,173 INFO L168 Benchmark]: Toolchain (without parser) took 2528.26 ms. Allocated memory is still 158.3 MB. Free memory was 133.9 MB in the beginning and 64.6 MB in the end (delta: 69.4 MB). Peak memory consumption was 69.7 MB. Max. memory is 8.0 GB. [2020-10-23 17:57:49,174 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 158.3 MB. Free memory is still 132.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 17:57:49,175 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.31 ms. Allocated memory is still 158.3 MB. Free memory was 133.4 MB in the beginning and 124.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 17:57:49,176 INFO L168 Benchmark]: Boogie Preprocessor took 64.51 ms. Allocated memory is still 158.3 MB. Free memory was 123.8 MB in the beginning and 122.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 17:57:49,177 INFO L168 Benchmark]: RCFGBuilder took 647.93 ms. Allocated memory is still 158.3 MB. Free memory was 122.6 MB in the beginning and 109.8 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 17:57:49,178 INFO L168 Benchmark]: TraceAbstraction took 1536.76 ms. Allocated memory is still 158.3 MB. Free memory was 109.4 MB in the beginning and 64.6 MB in the end (delta: 44.8 MB). Peak memory consumption was 45.6 MB. Max. memory is 8.0 GB. [2020-10-23 17:57:49,183 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 158.3 MB. Free memory is still 132.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 265.31 ms. Allocated memory is still 158.3 MB. Free memory was 133.4 MB in the beginning and 124.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 64.51 ms. Allocated memory is still 158.3 MB. Free memory was 123.8 MB in the beginning and 122.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 647.93 ms. Allocated memory is still 158.3 MB. Free memory was 122.6 MB in the beginning and 109.8 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1536.76 ms. Allocated memory is still 158.3 MB. Free memory was 109.4 MB in the beginning and 64.6 MB in the end (delta: 44.8 MB). Peak memory consumption was 45.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L16] int g; VAL [\old(g)=52, g=0] [L28] int g = __VERIFIER_nondet_int(); [L29] int h = !g; VAL [\old(g)=0, g=0, g=-1, h=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 [\old(g)=0, A(g,h)=-3, g=-1, g=-1, h=0] [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 [\old(g)=0, A(g,h)=-5, g=-1, g=-1, h=0] [L32] COND TRUE \read(g) VAL [\old(g)=0, g=-1, g=-1, h=0] [L33] CALL reach_error() VAL [\old(g)=0, g=-1] [L3] __assert_fail("0", "BallRajamani-SPIN2000-Fig1.c", 3, "reach_error") VAL [\old(g)=0, g=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 11 SDslu, 51 SDs, 0 SdLazy, 68 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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, 75 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 2100 SizeOfPredicates, 1 NumberOfNonLiveVariables, 134 ConjunctsInSsa, 7 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...