./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/locks/test_locks_15-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8d31f386 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/locks/test_locks_15-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 04dfa849b43716e8587b0fc4953cadbe3968c4e3 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-04 18:06:53,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-04 18:06:53,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-04 18:06:53,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-04 18:06:53,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-04 18:06:53,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-04 18:06:53,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-04 18:06:53,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-04 18:06:53,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-04 18:06:53,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-04 18:06:53,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-04 18:06:53,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-04 18:06:53,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-04 18:06:53,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-04 18:06:53,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-04 18:06:53,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-04 18:06:53,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-04 18:06:53,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-04 18:06:53,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-04 18:06:53,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-04 18:06:53,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-04 18:06:53,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-04 18:06:53,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-04 18:06:53,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-04 18:06:53,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-04 18:06:53,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-04 18:06:53,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-04 18:06:53,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-04 18:06:53,428 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-04 18:06:53,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-04 18:06:53,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-04 18:06:53,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-04 18:06:53,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-04 18:06:53,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-04 18:06:53,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-04 18:06:53,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-04 18:06:53,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-04 18:06:53,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-04 18:06:53,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-04 18:06:53,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-04 18:06:53,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-04 18:06:53,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-07-04 18:06:53,461 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-04 18:06:53,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-04 18:06:53,463 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-04 18:06:53,463 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-04 18:06:53,463 INFO L138 SettingsManager]: * Use SBE=true [2021-07-04 18:06:53,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-04 18:06:53,463 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-04 18:06:53,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-04 18:06:53,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-04 18:06:53,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-04 18:06:53,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-04 18:06:53,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-04 18:06:53,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-04 18:06:53,465 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-04 18:06:53,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-04 18:06:53,465 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-04 18:06:53,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-04 18:06:53,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-04 18:06:53,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-04 18:06:53,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-04 18:06:53,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-04 18:06:53,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-04 18:06:53,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-04 18:06:53,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-04 18:06:53,467 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-04 18:06:53,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-04 18:06:53,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-04 18:06:53,467 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-04 18:06:53,467 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04dfa849b43716e8587b0fc4953cadbe3968c4e3 [2021-07-04 18:06:53,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-04 18:06:53,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-04 18:06:53,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-04 18:06:53,812 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-04 18:06:53,816 INFO L275 PluginConnector]: CDTParser initialized [2021-07-04 18:06:53,816 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_15-1.c [2021-07-04 18:06:53,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8384cb772/ba2907aa9c524e01bc0c6c6a4ea88b9a/FLAG00f1e4e2f [2021-07-04 18:06:54,257 INFO L306 CDTParser]: Found 1 translation units. [2021-07-04 18:06:54,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_15-1.c [2021-07-04 18:06:54,263 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8384cb772/ba2907aa9c524e01bc0c6c6a4ea88b9a/FLAG00f1e4e2f [2021-07-04 18:06:54,286 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8384cb772/ba2907aa9c524e01bc0c6c6a4ea88b9a [2021-07-04 18:06:54,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-04 18:06:54,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-07-04 18:06:54,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-04 18:06:54,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-04 18:06:54,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-04 18:06:54,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.07 06:06:54" (1/1) ... [2021-07-04 18:06:54,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40c001ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:06:54, skipping insertion in model container [2021-07-04 18:06:54,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.07 06:06:54" (1/1) ... [2021-07-04 18:06:54,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-04 18:06:54,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-04 18:06:54,550 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_15-1.c[5654,5667] [2021-07-04 18:06:54,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-04 18:06:54,557 INFO L203 MainTranslator]: Completed pre-run [2021-07-04 18:06:54,574 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_15-1.c[5654,5667] [2021-07-04 18:06:54,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-04 18:06:54,631 INFO L208 MainTranslator]: Completed translation [2021-07-04 18:06:54,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:06:54 WrapperNode [2021-07-04 18:06:54,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-04 18:06:54,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-04 18:06:54,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-04 18:06:54,660 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-04 18:06:54,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:06:54" (1/1) ... [2021-07-04 18:06:54,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:06:54" (1/1) ... [2021-07-04 18:06:54,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-04 18:06:54,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-04 18:06:54,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-04 18:06:54,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-04 18:06:54,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:06:54" (1/1) ... [2021-07-04 18:06:54,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:06:54" (1/1) ... [2021-07-04 18:06:54,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:06:54" (1/1) ... [2021-07-04 18:06:54,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:06:54" (1/1) ... [2021-07-04 18:06:54,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:06:54" (1/1) ... [2021-07-04 18:06:54,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:06:54" (1/1) ... [2021-07-04 18:06:54,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:06:54" (1/1) ... [2021-07-04 18:06:54,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-04 18:06:54,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-04 18:06:54,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-04 18:06:54,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-04 18:06:54,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:06:54" (1/1) ... [2021-07-04 18:06:54,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-04 18:06:54,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-04 18:06:54,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-07-04 18:06:54,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-07-04 18:06:54,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-04 18:06:54,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-04 18:06:54,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-04 18:06:54,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-04 18:06:55,159 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-04 18:06:55,160 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-07-04 18:06:55,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 06:06:55 BoogieIcfgContainer [2021-07-04 18:06:55,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-04 18:06:55,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-04 18:06:55,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-04 18:06:55,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-04 18:06:55,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.07 06:06:54" (1/3) ... [2021-07-04 18:06:55,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c18b14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.07 06:06:55, skipping insertion in model container [2021-07-04 18:06:55,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:06:54" (2/3) ... [2021-07-04 18:06:55,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c18b14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.07 06:06:55, skipping insertion in model container [2021-07-04 18:06:55,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 06:06:55" (3/3) ... [2021-07-04 18:06:55,166 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_15-1.c [2021-07-04 18:06:55,170 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-04 18:06:55,170 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-04 18:06:55,207 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION ======== [2021-07-04 18:06:55,211 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-04 18:06:55,211 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-04 18:06:55,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 54 states have internal predecessors, (102), 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) [2021-07-04 18:06:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-04 18:06:55,224 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:06:55,224 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:06:55,225 INFO L374 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:06:55,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:06:55,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1188553263, now seen corresponding path program 1 times [2021-07-04 18:06:55,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:06:55,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774883096] [2021-07-04 18:06:55,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:06:55,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:06:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:06:55,360 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:06:55,361 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:06:55,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:06:55,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:06:55,370 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:06:55,371 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:06:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:06:55,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:06:55,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774883096] [2021-07-04 18:06:55,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774883096] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:06:55,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:06:55,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:06:55,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969371243] [2021-07-04 18:06:55,377 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:06:55,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:06:55,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:06:55,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:06:55,387 INFO L87 Difference]: Start difference. First operand has 55 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 54 states have internal predecessors, (102), 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 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-07-04 18:06:55,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:06:55,421 INFO L93 Difference]: Finished difference Result 160 states and 300 transitions. [2021-07-04 18:06:55,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:06:55,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 22 [2021-07-04 18:06:55,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:06:55,428 INFO L225 Difference]: With dead ends: 160 [2021-07-04 18:06:55,428 INFO L226 Difference]: Without dead ends: 99 [2021-07-04 18:06:55,430 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:06:55,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-04 18:06:55,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2021-07-04 18:06:55,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.90625) internal successors, (183), 96 states have internal predecessors, (183), 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) [2021-07-04 18:06:55,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 183 transitions. [2021-07-04 18:06:55,456 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 183 transitions. Word has length 22 [2021-07-04 18:06:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:06:55,457 INFO L442 AbstractCegarLoop]: Abstraction has 97 states and 183 transitions. [2021-07-04 18:06:55,457 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-07-04 18:06:55,457 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 183 transitions. [2021-07-04 18:06:55,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-04 18:06:55,458 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:06:55,458 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:06:55,458 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-04 18:06:55,458 INFO L374 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:06:55,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:06:55,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1188560455, now seen corresponding path program 1 times [2021-07-04 18:06:55,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:06:55,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433921256] [2021-07-04 18:06:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:06:55,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:06:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:06:55,496 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:06:55,497 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:06:55,497 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:06:55,498 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-04 18:06:55,500 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:06:55,501 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:06:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:06:55,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:06:55,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433921256] [2021-07-04 18:06:55,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433921256] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:06:55,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:06:55,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:06:55,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287942996] [2021-07-04 18:06:55,503 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:06:55,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:06:55,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:06:55,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:06:55,504 INFO L87 Difference]: Start difference. First operand 97 states and 183 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-07-04 18:06:55,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:06:55,514 INFO L93 Difference]: Finished difference Result 100 states and 186 transitions. [2021-07-04 18:06:55,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:06:55,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 22 [2021-07-04 18:06:55,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:06:55,516 INFO L225 Difference]: With dead ends: 100 [2021-07-04 18:06:55,516 INFO L226 Difference]: Without dead ends: 98 [2021-07-04 18:06:55,517 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:06:55,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-04 18:06:55,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-07-04 18:06:55,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.8969072164948453) internal successors, (184), 97 states have internal predecessors, (184), 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) [2021-07-04 18:06:55,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 184 transitions. [2021-07-04 18:06:55,539 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 184 transitions. Word has length 22 [2021-07-04 18:06:55,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:06:55,540 INFO L442 AbstractCegarLoop]: Abstraction has 98 states and 184 transitions. [2021-07-04 18:06:55,540 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-07-04 18:06:55,540 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 184 transitions. [2021-07-04 18:06:55,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-04 18:06:55,541 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:06:55,541 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:06:55,541 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-04 18:06:55,542 INFO L374 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:06:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:06:55,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1112269327, now seen corresponding path program 1 times [2021-07-04 18:06:55,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:06:55,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511977462] [2021-07-04 18:06:55,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:06:55,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:06:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:06:55,622 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:06:55,622 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:06:55,623 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:06:55,623 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:06:55,626 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:06:55,629 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:06:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:06:55,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:06:55,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511977462] [2021-07-04 18:06:55,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511977462] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:06:55,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:06:55,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:06:55,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147902618] [2021-07-04 18:06:55,631 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:06:55,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:06:55,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:06:55,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:06:55,634 INFO L87 Difference]: Start difference. First operand 98 states and 184 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-07-04 18:06:55,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:06:55,659 INFO L93 Difference]: Finished difference Result 233 states and 437 transitions. [2021-07-04 18:06:55,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:06:55,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 22 [2021-07-04 18:06:55,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:06:55,661 INFO L225 Difference]: With dead ends: 233 [2021-07-04 18:06:55,663 INFO L226 Difference]: Without dead ends: 137 [2021-07-04 18:06:55,663 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:06:55,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-04 18:06:55,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2021-07-04 18:06:55,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.8656716417910448) internal successors, (250), 134 states have internal predecessors, (250), 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) [2021-07-04 18:06:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 250 transitions. [2021-07-04 18:06:55,679 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 250 transitions. Word has length 22 [2021-07-04 18:06:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:06:55,679 INFO L442 AbstractCegarLoop]: Abstraction has 135 states and 250 transitions. [2021-07-04 18:06:55,680 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-07-04 18:06:55,680 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 250 transitions. [2021-07-04 18:06:55,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-04 18:06:55,681 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:06:55,681 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:06:55,682 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-04 18:06:55,682 INFO L374 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:06:55,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:06:55,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1112262135, now seen corresponding path program 1 times [2021-07-04 18:06:55,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:06:55,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310232566] [2021-07-04 18:06:55,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:06:55,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:06:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:06:55,749 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:06:55,749 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:06:55,750 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:06:55,751 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-04 18:06:55,753 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:06:55,754 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:06:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:06:55,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:06:55,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310232566] [2021-07-04 18:06:55,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310232566] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:06:55,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:06:55,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:06:55,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360441480] [2021-07-04 18:06:55,756 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:06:55,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:06:55,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:06:55,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:06:55,757 INFO L87 Difference]: Start difference. First operand 135 states and 250 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-07-04 18:06:55,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:06:55,786 INFO L93 Difference]: Finished difference Result 187 states and 341 transitions. [2021-07-04 18:06:55,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:06:55,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 22 [2021-07-04 18:06:55,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:06:55,787 INFO L225 Difference]: With dead ends: 187 [2021-07-04 18:06:55,787 INFO L226 Difference]: Without dead ends: 135 [2021-07-04 18:06:55,788 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:06:55,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-04 18:06:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2021-07-04 18:06:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.8409090909090908) internal successors, (243), 132 states have internal predecessors, (243), 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) [2021-07-04 18:06:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 243 transitions. [2021-07-04 18:06:55,808 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 243 transitions. Word has length 22 [2021-07-04 18:06:55,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:06:55,809 INFO L442 AbstractCegarLoop]: Abstraction has 133 states and 243 transitions. [2021-07-04 18:06:55,809 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-07-04 18:06:55,810 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 243 transitions. [2021-07-04 18:06:55,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-04 18:06:55,810 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:06:55,810 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:06:55,811 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-04 18:06:55,811 INFO L374 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:06:55,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:06:55,811 INFO L82 PathProgramCache]: Analyzing trace with hash -476078575, now seen corresponding path program 1 times [2021-07-04 18:06:55,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:06:55,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793332028] [2021-07-04 18:06:55,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:06:55,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:06:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-04 18:06:55,853 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-04 18:06:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-04 18:06:55,886 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-04 18:06:55,913 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-04 18:06:55,913 INFO L639 BasicCegarLoop]: Counterexample is feasible [2021-07-04 18:06:55,916 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-04 18:06:55,916 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-04 18:06:55,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.07 06:06:55 BoogieIcfgContainer [2021-07-04 18:06:55,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-04 18:06:55,948 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-04 18:06:55,948 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-04 18:06:55,948 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-04 18:06:55,948 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 06:06:55" (3/4) ... [2021-07-04 18:06:55,949 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-07-04 18:06:55,988 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-04 18:06:55,989 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-04 18:06:55,990 INFO L168 Benchmark]: Toolchain (without parser) took 1694.23 ms. Allocated memory was 79.7 MB in the beginning and 113.2 MB in the end (delta: 33.6 MB). Free memory was 63.5 MB in the beginning and 60.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 35.0 MB. Max. memory is 16.1 GB. [2021-07-04 18:06:55,990 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 79.7 MB. Free memory is still 61.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 18:06:55,990 INFO L168 Benchmark]: CACSL2BoogieTranslator took 357.53 ms. Allocated memory is still 79.7 MB. Free memory was 63.3 MB in the beginning and 62.6 MB in the end (delta: 729.8 kB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2021-07-04 18:06:55,990 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.29 ms. Allocated memory is still 79.7 MB. Free memory was 62.6 MB in the beginning and 60.6 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 18:06:55,991 INFO L168 Benchmark]: Boogie Preprocessor took 65.51 ms. Allocated memory is still 79.7 MB. Free memory was 60.6 MB in the beginning and 59.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 18:06:55,991 INFO L168 Benchmark]: RCFGBuilder took 376.37 ms. Allocated memory is still 79.7 MB. Free memory was 59.2 MB in the beginning and 34.5 MB in the end (delta: 24.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-07-04 18:06:55,991 INFO L168 Benchmark]: TraceAbstraction took 785.57 ms. Allocated memory was 79.7 MB in the beginning and 113.2 MB in the end (delta: 33.6 MB). Free memory was 34.1 MB in the beginning and 65.1 MB in the end (delta: -31.0 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2021-07-04 18:06:55,992 INFO L168 Benchmark]: Witness Printer took 41.04 ms. Allocated memory is still 113.2 MB. Free memory was 65.1 MB in the beginning and 60.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-07-04 18:06:55,993 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 79.7 MB. Free memory is still 61.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 357.53 ms. Allocated memory is still 79.7 MB. Free memory was 63.3 MB in the beginning and 62.6 MB in the end (delta: 729.8 kB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.29 ms. Allocated memory is still 79.7 MB. Free memory was 62.6 MB in the beginning and 60.6 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 65.51 ms. Allocated memory is still 79.7 MB. Free memory was 60.6 MB in the beginning and 59.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 376.37 ms. Allocated memory is still 79.7 MB. Free memory was 59.2 MB in the beginning and 34.5 MB in the end (delta: 24.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 785.57 ms. Allocated memory was 79.7 MB in the beginning and 113.2 MB in the end (delta: 33.6 MB). Free memory was 34.1 MB in the beginning and 65.1 MB in the end (delta: -31.0 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. * Witness Printer took 41.04 ms. Allocated memory is still 113.2 MB. Free memory was 65.1 MB in the beginning and 60.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 233]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L8] int p1 = __VERIFIER_nondet_int(); [L9] int lk1; [L11] int p2 = __VERIFIER_nondet_int(); [L12] int lk2; [L14] int p3 = __VERIFIER_nondet_int(); [L15] int lk3; [L17] int p4 = __VERIFIER_nondet_int(); [L18] int lk4; [L20] int p5 = __VERIFIER_nondet_int(); [L21] int lk5; [L23] int p6 = __VERIFIER_nondet_int(); [L24] int lk6; [L26] int p7 = __VERIFIER_nondet_int(); [L27] int lk7; [L29] int p8 = __VERIFIER_nondet_int(); [L30] int lk8; [L32] int p9 = __VERIFIER_nondet_int(); [L33] int lk9; [L35] int p10 = __VERIFIER_nondet_int(); [L36] int lk10; [L38] int p11 = __VERIFIER_nondet_int(); [L39] int lk11; [L41] int p12 = __VERIFIER_nondet_int(); [L42] int lk12; [L44] int p13 = __VERIFIER_nondet_int(); [L45] int lk13; [L47] int p14 = __VERIFIER_nondet_int(); [L48] int lk14; [L50] int p15 = __VERIFIER_nondet_int(); [L51] int lk15; [L54] int cond; [L56] COND TRUE 1 [L57] cond = __VERIFIER_nondet_int() [L58] COND FALSE !(cond == 0) [L61] lk1 = 0 [L63] lk2 = 0 [L65] lk3 = 0 [L67] lk4 = 0 [L69] lk5 = 0 [L71] lk6 = 0 [L73] lk7 = 0 [L75] lk8 = 0 [L77] lk9 = 0 [L79] lk10 = 0 [L81] lk11 = 0 [L83] lk12 = 0 [L85] lk13 = 0 [L87] lk14 = 0 [L89] lk15 = 0 [L93] COND FALSE !(p1 != 0) [L97] COND FALSE !(p2 != 0) [L101] COND FALSE !(p3 != 0) [L105] COND TRUE p4 != 0 [L106] lk4 = 1 [L109] COND TRUE p5 != 0 [L110] lk5 = 1 [L113] COND TRUE p6 != 0 [L114] lk6 = 1 [L117] COND TRUE p7 != 0 [L118] lk7 = 1 [L121] COND TRUE p8 != 0 [L122] lk8 = 1 [L125] COND TRUE p9 != 0 [L126] lk9 = 1 [L129] COND TRUE p10 != 0 [L130] lk10 = 1 [L133] COND FALSE !(p11 != 0) [L137] COND TRUE p12 != 0 [L138] lk12 = 1 [L141] COND TRUE p13 != 0 [L142] lk13 = 1 [L145] COND TRUE p14 != 0 [L146] lk14 = 1 [L149] COND TRUE p15 != 0 [L150] lk15 = 1 [L155] COND FALSE !(p1 != 0) [L160] COND FALSE !(p2 != 0) [L233] reach_error() - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION CFG has 1 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 713.3ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 9.1ms, AutomataDifference: 129.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 475 SDtfs, 244 SDslu, 307 SDs, 0 SdLazy, 20 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 44.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=135occurred in iteration=3, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 75.7ms AutomataMinimizationTime, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 11.6ms SsaConstructionTime, 134.1ms SatisfiabilityAnalysisTime, 162.6ms InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 236 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-07-04 18:06:56,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...