/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/concurrent/pthreads/regression/pthreadMutex01-safe.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 20:29:26,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 20:29:26,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 20:29:26,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 20:29:26,889 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 20:29:26,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 20:29:26,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 20:29:26,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 20:29:26,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 20:29:26,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 20:29:26,891 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 20:29:26,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 20:29:26,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 20:29:26,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 20:29:26,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 20:29:26,893 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 20:29:26,907 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 20:29:26,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 20:29:26,907 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 20:29:26,907 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 20:29:26,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 20:29:26,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 20:29:26,908 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 20:29:26,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 20:29:26,908 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 20:29:26,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 20:29:26,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 20:29:26,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 20:29:26,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 20:29:26,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 20:29:26,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 20:29:26,909 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 20:29:26,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 20:29:26,909 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 20:29:26,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 20:29:26,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 20:29:26,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 20:29:26,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 20:29:26,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 20:29:26,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 20:29:26,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 20:29:26,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 20:29:26,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 20:29:26,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 20:29:26,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 20:29:26,910 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 20:29:26,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 20:29:26,910 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 20:29:27,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 20:29:27,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 20:29:27,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 20:29:27,167 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 20:29:27,168 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 20:29:27,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/regression/pthreadMutex01-safe.c [2021-06-05 20:29:27,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97f763ff2/7551a970d13f4d33a860e1651c7434c0/FLAG39452280f [2021-06-05 20:29:27,577 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 20:29:27,578 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/regression/pthreadMutex01-safe.c [2021-06-05 20:29:27,578 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2021-06-05 20:29:27,578 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-06-05 20:29:27,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97f763ff2/7551a970d13f4d33a860e1651c7434c0/FLAG39452280f [2021-06-05 20:29:27,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97f763ff2/7551a970d13f4d33a860e1651c7434c0 [2021-06-05 20:29:27,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 20:29:27,620 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 20:29:27,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 20:29:27,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 20:29:27,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 20:29:27,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 08:29:27" (1/1) ... [2021-06-05 20:29:27,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c8ec7b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:29:27, skipping insertion in model container [2021-06-05 20:29:27,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 08:29:27" (1/1) ... [2021-06-05 20:29:27,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 20:29:27,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 20:29:27,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 20:29:27,750 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 20:29:27,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 20:29:27,775 INFO L208 MainTranslator]: Completed translation [2021-06-05 20:29:27,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:29:27 WrapperNode [2021-06-05 20:29:27,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 20:29:27,776 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 20:29:27,776 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 20:29:27,776 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 20:29:27,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:29:27" (1/1) ... [2021-06-05 20:29:27,785 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:29:27" (1/1) ... [2021-06-05 20:29:27,795 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 20:29:27,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 20:29:27,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 20:29:27,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 20:29:27,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:29:27" (1/1) ... [2021-06-05 20:29:27,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:29:27" (1/1) ... [2021-06-05 20:29:27,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:29:27" (1/1) ... [2021-06-05 20:29:27,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:29:27" (1/1) ... [2021-06-05 20:29:27,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:29:27" (1/1) ... [2021-06-05 20:29:27,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:29:27" (1/1) ... [2021-06-05 20:29:27,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:29:27" (1/1) ... [2021-06-05 20:29:27,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 20:29:27,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 20:29:27,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 20:29:27,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 20:29:27,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:29:27" (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 [2021-06-05 20:29:27,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-06-05 20:29:27,867 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-06-05 20:29:27,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 20:29:27,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 20:29:27,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 20:29:27,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 20:29:28,031 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 20:29:28,032 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-05 20:29:28,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 08:29:28 BoogieIcfgContainer [2021-06-05 20:29:28,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 20:29:28,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 20:29:28,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 20:29:28,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 20:29:28,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 08:29:27" (1/3) ... [2021-06-05 20:29:28,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f40e853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 08:29:28, skipping insertion in model container [2021-06-05 20:29:28,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:29:27" (2/3) ... [2021-06-05 20:29:28,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f40e853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 08:29:28, skipping insertion in model container [2021-06-05 20:29:28,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 08:29:28" (3/3) ... [2021-06-05 20:29:28,040 INFO L111 eAbstractionObserver]: Analyzing ICFG pthreadMutex01-safe.c [2021-06-05 20:29:28,044 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 20:29:28,044 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-06-05 20:29:28,061 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 20:29:28,086 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 20:29:28,086 INFO L379 AbstractCegarLoop]: Hoare is true [2021-06-05 20:29:28,086 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 20:29:28,086 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 20:29:28,086 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 20:29:28,086 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 20:29:28,087 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 20:29:28,087 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 20:29:28,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 8 states have (on average 1.375) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:29:28,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 20:29:28,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:29:28,104 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 20:29:28,104 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:29:28,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:29:28,109 INFO L82 PathProgramCache]: Analyzing trace with hash 925604, now seen corresponding path program 1 times [2021-06-05 20:29:28,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:29:28,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355274990] [2021-06-05 20:29:28,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:29:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:29:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:29:28,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:29:28,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355274990] [2021-06-05 20:29:28,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355274990] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:29:28,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:29:28,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 20:29:28,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284278366] [2021-06-05 20:29:28,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 20:29:28,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:29:28,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 20:29:28,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:29:28,265 INFO L87 Difference]: Start difference. First operand has 11 states, 8 states have (on average 1.375) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:29:28,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:29:28,282 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-06-05 20:29:28,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 20:29:28,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-06-05 20:29:28,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:29:28,288 INFO L225 Difference]: With dead ends: 14 [2021-06-05 20:29:28,288 INFO L226 Difference]: Without dead ends: 6 [2021-06-05 20:29:28,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:29:28,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-06-05 20:29:28,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-06-05 20:29:28,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:29:28,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 5 transitions. [2021-06-05 20:29:28,306 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 5 transitions. Word has length 4 [2021-06-05 20:29:28,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:29:28,306 INFO L482 AbstractCegarLoop]: Abstraction has 6 states and 5 transitions. [2021-06-05 20:29:28,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:29:28,306 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 5 transitions. [2021-06-05 20:29:28,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 20:29:28,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:29:28,307 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 20:29:28,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 20:29:28,307 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:29:28,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:29:28,308 INFO L82 PathProgramCache]: Analyzing trace with hash 28697735, now seen corresponding path program 1 times [2021-06-05 20:29:28,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:29:28,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041081437] [2021-06-05 20:29:28,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:29:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:29:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:29:28,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:29:28,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041081437] [2021-06-05 20:29:28,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041081437] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:29:28,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:29:28,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 20:29:28,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038177119] [2021-06-05 20:29:28,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 20:29:28,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:29:28,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 20:29:28,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:29:28,334 INFO L87 Difference]: Start difference. First operand 6 states and 5 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:29:28,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:29:28,337 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2021-06-05 20:29:28,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 20:29:28,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-06-05 20:29:28,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:29:28,338 INFO L225 Difference]: With dead ends: 6 [2021-06-05 20:29:28,338 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 20:29:28,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:29:28,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 20:29:28,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 20:29:28,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:29:28,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 20:29:28,339 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2021-06-05 20:29:28,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:29:28,339 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 20:29:28,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:29:28,340 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 20:29:28,340 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 20:29:28,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 20:29:28,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-06-05 20:29:28,348 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-06-05 20:29:28,348 INFO L198 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-06-05 20:29:28,348 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-06-05 20:29:28,348 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-06-05 20:29:28,348 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 43) no Hoare annotation was computed. [2021-06-05 20:29:28,348 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONASSERT(line 47) no Hoare annotation was computed. [2021-06-05 20:29:28,348 INFO L194 CegarLoopUtils]: At program point L49(lines 38 50) the Hoare annotation is: false [2021-06-05 20:29:28,349 INFO L198 CegarLoopUtils]: For program point L47(line 47) no Hoare annotation was computed. [2021-06-05 20:29:28,349 INFO L198 CegarLoopUtils]: For program point L43(line 43) no Hoare annotation was computed. [2021-06-05 20:29:28,349 INFO L198 CegarLoopUtils]: For program point L42(lines 42 44) no Hoare annotation was computed. [2021-06-05 20:29:28,349 INFO L198 CegarLoopUtils]: For program point L42-2(lines 42 44) no Hoare annotation was computed. [2021-06-05 20:29:28,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 08:29:28 BoogieIcfgContainer [2021-06-05 20:29:28,355 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 20:29:28,356 INFO L168 Benchmark]: Toolchain (without parser) took 735.48 ms. Allocated memory is still 348.1 MB. Free memory was 309.9 MB in the beginning and 290.2 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.5 MB. Max. memory is 16.0 GB. [2021-06-05 20:29:28,356 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 348.1 MB. Free memory is still 328.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 20:29:28,357 INFO L168 Benchmark]: CACSL2BoogieTranslator took 154.44 ms. Allocated memory is still 348.1 MB. Free memory was 309.7 MB in the beginning and 329.9 MB in the end (delta: -20.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.0 GB. [2021-06-05 20:29:28,357 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.50 ms. Allocated memory is still 348.1 MB. Free memory was 329.9 MB in the beginning and 329.0 MB in the end (delta: 905.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 20:29:28,357 INFO L168 Benchmark]: Boogie Preprocessor took 9.76 ms. Allocated memory is still 348.1 MB. Free memory was 329.0 MB in the beginning and 327.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 20:29:28,358 INFO L168 Benchmark]: RCFGBuilder took 227.80 ms. Allocated memory is still 348.1 MB. Free memory was 327.9 MB in the beginning and 314.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 20:29:28,358 INFO L168 Benchmark]: TraceAbstraction took 319.56 ms. Allocated memory is still 348.1 MB. Free memory was 314.3 MB in the beginning and 290.2 MB in the end (delta: 24.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.0 GB. [2021-06-05 20:29:28,360 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 348.1 MB. Free memory is still 328.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 154.44 ms. Allocated memory is still 348.1 MB. Free memory was 309.7 MB in the beginning and 329.9 MB in the end (delta: -20.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.50 ms. Allocated memory is still 348.1 MB. Free memory was 329.9 MB in the beginning and 329.0 MB in the end (delta: 905.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.76 ms. Allocated memory is still 348.1 MB. Free memory was 329.0 MB in the beginning and 327.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 227.80 ms. Allocated memory is still 348.1 MB. Free memory was 327.9 MB in the beginning and 314.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 319.56 ms. Allocated memory is still 348.1 MB. Free memory was 314.3 MB in the beginning and 290.2 MB in the end (delta: 24.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 47]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start CFG has 1 procedures, 11 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 255.9ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 9.2ms, AutomataDifference: 37.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 7.1ms, InitialAbstractionConstructionTime: 7.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7 SDtfs, 3 SDslu, 1 SDs, 0 SdLazy, 2 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 8.6ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 1 NumberOfFragments, 1 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 2.1ms HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 1.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 9.2ms SsaConstructionTime, 29.8ms SatisfiabilityAnalysisTime, 78.3ms InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 21 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: 0 RESULT: Ultimate proved your program to be correct! Received shutdown request...