./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_7.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/locks/test_locks_7.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/bin/utaipan-eEHZpOm5b7 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 05c715fd95d2209519e9aa0425ca71b72050ac0ff5d332c8a9deb8ead8471230 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:58:23,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:58:23,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:58:23,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:58:23,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:58:23,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:58:23,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:58:23,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:58:23,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:58:23,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:58:23,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:58:23,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:58:23,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:58:23,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:58:23,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:58:23,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:58:23,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:58:23,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:58:23,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:58:23,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:58:23,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:58:23,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:58:23,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:58:23,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:58:23,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:58:23,599 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:58:23,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:58:23,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:58:23,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:58:23,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:58:23,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:58:23,605 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:58:23,607 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:58:23,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:58:23,610 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:58:23,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:58:23,611 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:58:23,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:58:23,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:58:23,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:58:23,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:58:23,615 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:58:23,665 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:58:23,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:58:23,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:58:23,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:58:23,674 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:58:23,674 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:58:23,674 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:58:23,674 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:58:23,674 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:58:23,675 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:58:23,676 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:58:23,676 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:58:23,676 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:58:23,676 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:58:23,677 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:58:23,677 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:58:23,677 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:58:23,677 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:58:23,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:58:23,678 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:58:23,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:58:23,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:58:23,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:58:23,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:58:23,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:58:23,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:58:23,680 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:58:23,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:58:23,680 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:58:23,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:58:23,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:58:23,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:58:23,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:58:23,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:58:23,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:58:23,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:58:23,682 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:58:23,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:58:23,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:58:23,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:58:23,683 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:58:23,683 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05c715fd95d2209519e9aa0425ca71b72050ac0ff5d332c8a9deb8ead8471230 [2021-11-25 19:58:23,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:58:23,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:58:23,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:58:23,985 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:58:23,986 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:58:23,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/locks/test_locks_7.c [2021-11-25 19:58:24,075 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/bin/utaipan-eEHZpOm5b7/data/ac5deabf3/19968dde625c484993f8af0e29e0fc1c/FLAG3afad4f6c [2021-11-25 19:58:24,573 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:58:24,573 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/sv-benchmarks/c/locks/test_locks_7.c [2021-11-25 19:58:24,581 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/bin/utaipan-eEHZpOm5b7/data/ac5deabf3/19968dde625c484993f8af0e29e0fc1c/FLAG3afad4f6c [2021-11-25 19:58:24,945 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/bin/utaipan-eEHZpOm5b7/data/ac5deabf3/19968dde625c484993f8af0e29e0fc1c [2021-11-25 19:58:24,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:58:24,949 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:58:24,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:58:24,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:58:24,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:58:24,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:58:24" (1/1) ... [2021-11-25 19:58:24,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ce852b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:24, skipping insertion in model container [2021-11-25 19:58:24,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:58:24" (1/1) ... [2021-11-25 19:58:24,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:58:24,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:58:25,252 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/sv-benchmarks/c/locks/test_locks_7.c[2881,2894] [2021-11-25 19:58:25,257 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:58:25,267 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:58:25,308 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/sv-benchmarks/c/locks/test_locks_7.c[2881,2894] [2021-11-25 19:58:25,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:58:25,323 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:58:25,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:25 WrapperNode [2021-11-25 19:58:25,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:58:25,325 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:58:25,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:58:25,325 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:58:25,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:25" (1/1) ... [2021-11-25 19:58:25,341 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:25" (1/1) ... [2021-11-25 19:58:25,370 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 105 [2021-11-25 19:58:25,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:58:25,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:58:25,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:58:25,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:58:25,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:25" (1/1) ... [2021-11-25 19:58:25,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:25" (1/1) ... [2021-11-25 19:58:25,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:25" (1/1) ... [2021-11-25 19:58:25,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:25" (1/1) ... [2021-11-25 19:58:25,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:25" (1/1) ... [2021-11-25 19:58:25,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:25" (1/1) ... [2021-11-25 19:58:25,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:25" (1/1) ... [2021-11-25 19:58:25,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:58:25,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:58:25,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:58:25,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:58:25,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:25" (1/1) ... [2021-11-25 19:58:25,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:58:25,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:58:25,457 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:58:25,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:58:25,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:58:25,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:58:25,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:58:25,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:58:25,572 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:58:25,573 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:58:25,791 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:58:25,881 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:58:25,882 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:58:25,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:58:25 BoogieIcfgContainer [2021-11-25 19:58:25,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:58:25,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:58:25,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:58:25,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:58:25,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:58:24" (1/3) ... [2021-11-25 19:58:25,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a481b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:58:25, skipping insertion in model container [2021-11-25 19:58:25,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:25" (2/3) ... [2021-11-25 19:58:25,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a481b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:58:25, skipping insertion in model container [2021-11-25 19:58:25,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:58:25" (3/3) ... [2021-11-25 19:58:25,895 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2021-11-25 19:58:25,901 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:58:25,901 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:58:25,952 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:58:25,959 INFO L339 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:58:25,960 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:58:25,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 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) [2021-11-25 19:58:25,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:58:25,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:25,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:58:25,991 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:25,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:26,009 INFO L85 PathProgramCache]: Analyzing trace with hash 787408259, now seen corresponding path program 1 times [2021-11-25 19:58:26,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:26,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093484690] [2021-11-25 19:58:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:26,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:26,217 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:26,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093484690] [2021-11-25 19:58:26,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093484690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:26,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:26,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:58:26,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849274977] [2021-11-25 19:58:26,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:26,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:58:26,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:26,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:58:26,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:26,260 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 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 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-25 19:58:26,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:26,313 INFO L93 Difference]: Finished difference Result 46 states and 73 transitions. [2021-11-25 19:58:26,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:58:26,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2021-11-25 19:58:26,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:26,336 INFO L225 Difference]: With dead ends: 46 [2021-11-25 19:58:26,336 INFO L226 Difference]: Without dead ends: 35 [2021-11-25 19:58:26,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:26,345 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 31 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:26,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 87 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:58:26,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-25 19:58:26,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 19. [2021-11-25 19:58:26,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 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) [2021-11-25 19:58:26,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 31 transitions. [2021-11-25 19:58:26,408 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 31 transitions. Word has length 6 [2021-11-25 19:58:26,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:26,409 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 31 transitions. [2021-11-25 19:58:26,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-25 19:58:26,410 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 31 transitions. [2021-11-25 19:58:26,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:58:26,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:26,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:26,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:58:26,411 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:26,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:26,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1359933427, now seen corresponding path program 1 times [2021-11-25 19:58:26,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:26,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23127060] [2021-11-25 19:58:26,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:26,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:26,548 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:26,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23127060] [2021-11-25 19:58:26,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23127060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:26,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:26,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:58:26,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181054166] [2021-11-25 19:58:26,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:26,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:58:26,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:26,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:58:26,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:26,553 INFO L87 Difference]: Start difference. First operand 19 states and 31 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-11-25 19:58:26,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:26,595 INFO L93 Difference]: Finished difference Result 35 states and 55 transitions. [2021-11-25 19:58:26,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:58:26,596 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-11-25 19:58:26,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:26,597 INFO L225 Difference]: With dead ends: 35 [2021-11-25 19:58:26,597 INFO L226 Difference]: Without dead ends: 33 [2021-11-25 19:58:26,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:26,600 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:26,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 74 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:58:26,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-25 19:58:26,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 19. [2021-11-25 19:58:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 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) [2021-11-25 19:58:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 30 transitions. [2021-11-25 19:58:26,606 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 30 transitions. Word has length 7 [2021-11-25 19:58:26,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:26,607 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 30 transitions. [2021-11-25 19:58:26,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-11-25 19:58:26,607 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 30 transitions. [2021-11-25 19:58:26,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:58:26,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:26,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:26,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:58:26,609 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:26,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:26,612 INFO L85 PathProgramCache]: Analyzing trace with hash 791951384, now seen corresponding path program 1 times [2021-11-25 19:58:26,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:26,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070329558] [2021-11-25 19:58:26,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:26,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:26,711 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:26,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070329558] [2021-11-25 19:58:26,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070329558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:26,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:26,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:58:26,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328130220] [2021-11-25 19:58:26,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:26,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:58:26,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:26,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:58:26,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:26,714 INFO L87 Difference]: Start difference. First operand 19 states and 30 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-25 19:58:26,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:26,747 INFO L93 Difference]: Finished difference Result 33 states and 50 transitions. [2021-11-25 19:58:26,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:58:26,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2021-11-25 19:58:26,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:26,750 INFO L225 Difference]: With dead ends: 33 [2021-11-25 19:58:26,750 INFO L226 Difference]: Without dead ends: 31 [2021-11-25 19:58:26,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:26,752 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:26,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 68 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:58:26,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-25 19:58:26,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2021-11-25 19:58:26,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 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) [2021-11-25 19:58:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 29 transitions. [2021-11-25 19:58:26,759 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 29 transitions. Word has length 8 [2021-11-25 19:58:26,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:26,760 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 29 transitions. [2021-11-25 19:58:26,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-25 19:58:26,760 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 29 transitions. [2021-11-25 19:58:26,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:58:26,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:26,761 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:26,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:58:26,762 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:26,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:26,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1219095870, now seen corresponding path program 1 times [2021-11-25 19:58:26,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:26,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741221857] [2021-11-25 19:58:26,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:26,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:26,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:26,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741221857] [2021-11-25 19:58:26,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741221857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:26,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:26,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:58:26,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692339623] [2021-11-25 19:58:26,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:26,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:58:26,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:26,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:58:26,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:26,845 INFO L87 Difference]: Start difference. First operand 19 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-25 19:58:26,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:26,873 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2021-11-25 19:58:26,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:58:26,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-11-25 19:58:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:26,876 INFO L225 Difference]: With dead ends: 31 [2021-11-25 19:58:26,876 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 19:58:26,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:26,890 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:26,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 62 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:58:26,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 19:58:26,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2021-11-25 19:58:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 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) [2021-11-25 19:58:26,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 28 transitions. [2021-11-25 19:58:26,895 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 28 transitions. Word has length 9 [2021-11-25 19:58:26,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:26,896 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 28 transitions. [2021-11-25 19:58:26,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-25 19:58:26,896 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 28 transitions. [2021-11-25 19:58:26,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:58:26,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:26,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:26,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:58:26,898 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:26,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:26,904 INFO L85 PathProgramCache]: Analyzing trace with hash 862949037, now seen corresponding path program 1 times [2021-11-25 19:58:26,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:26,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831596514] [2021-11-25 19:58:26,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:26,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:26,964 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:26,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831596514] [2021-11-25 19:58:26,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831596514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:26,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:26,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:58:26,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533192341] [2021-11-25 19:58:26,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:26,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:58:26,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:26,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:58:26,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:26,967 INFO L87 Difference]: Start difference. First operand 19 states and 28 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-25 19:58:26,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:26,991 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2021-11-25 19:58:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:58:26,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-11-25 19:58:26,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:26,993 INFO L225 Difference]: With dead ends: 29 [2021-11-25 19:58:26,993 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 19:58:26,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:26,994 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:26,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 55 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:58:26,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 19:58:26,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-11-25 19:58:26,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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) [2021-11-25 19:58:26,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 27 transitions. [2021-11-25 19:58:26,999 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 27 transitions. Word has length 10 [2021-11-25 19:58:26,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:26,999 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 27 transitions. [2021-11-25 19:58:27,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-25 19:58:27,000 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 27 transitions. [2021-11-25 19:58:27,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:58:27,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:27,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:27,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:58:27,001 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:27,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:27,002 INFO L85 PathProgramCache]: Analyzing trace with hash 981832055, now seen corresponding path program 1 times [2021-11-25 19:58:27,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:27,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048828722] [2021-11-25 19:58:27,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:27,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:27,046 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:27,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048828722] [2021-11-25 19:58:27,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048828722] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:27,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:27,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:58:27,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297441062] [2021-11-25 19:58:27,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:27,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:58:27,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:27,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:58:27,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:27,048 INFO L87 Difference]: Start difference. First operand 19 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-11-25 19:58:27,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:27,077 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2021-11-25 19:58:27,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:58:27,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) Word has length 11 [2021-11-25 19:58:27,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:27,082 INFO L225 Difference]: With dead ends: 27 [2021-11-25 19:58:27,082 INFO L226 Difference]: Without dead ends: 25 [2021-11-25 19:58:27,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:27,083 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:27,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 49 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:58:27,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-25 19:58:27,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2021-11-25 19:58:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 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) [2021-11-25 19:58:27,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2021-11-25 19:58:27,087 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 11 [2021-11-25 19:58:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:27,087 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2021-11-25 19:58:27,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-11-25 19:58:27,087 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2021-11-25 19:58:27,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 19:58:27,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:27,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:27,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:58:27,088 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:27,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:27,089 INFO L85 PathProgramCache]: Analyzing trace with hash 372238658, now seen corresponding path program 1 times [2021-11-25 19:58:27,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:27,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363860387] [2021-11-25 19:58:27,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:27,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:27,157 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:27,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363860387] [2021-11-25 19:58:27,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363860387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:27,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:27,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:58:27,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847500289] [2021-11-25 19:58:27,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:27,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:58:27,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:27,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:58:27,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:27,159 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-11-25 19:58:27,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:27,180 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2021-11-25 19:58:27,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:58:27,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2021-11-25 19:58:27,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:27,182 INFO L225 Difference]: With dead ends: 21 [2021-11-25 19:58:27,182 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 19:58:27,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:27,184 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:27,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 40 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:58:27,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 19:58:27,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 19:58:27,187 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) [2021-11-25 19:58:27,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 19:58:27,188 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-11-25 19:58:27,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:27,188 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 19:58:27,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-11-25 19:58:27,189 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 19:58:27,189 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 19:58:27,192 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 19:58:27,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:58:27,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-25 19:58:27,220 INFO L858 garLoopResultBuilder]: For program point L93-1(lines 32 118) no Hoare annotation was computed. [2021-11-25 19:58:27,220 INFO L858 garLoopResultBuilder]: For program point L77-1(lines 32 118) no Hoare annotation was computed. [2021-11-25 19:58:27,220 INFO L858 garLoopResultBuilder]: For program point L94(line 94) no Hoare annotation was computed. [2021-11-25 19:58:27,221 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-25 19:58:27,221 INFO L861 garLoopResultBuilder]: At program point L119(lines 7 123) the Hoare annotation is: true [2021-11-25 19:58:27,221 INFO L858 garLoopResultBuilder]: For program point L103-1(lines 32 118) no Hoare annotation was computed. [2021-11-25 19:58:27,221 INFO L858 garLoopResultBuilder]: For program point L104(line 104) no Hoare annotation was computed. [2021-11-25 19:58:27,221 INFO L858 garLoopResultBuilder]: For program point L88-1(lines 32 118) no Hoare annotation was computed. [2021-11-25 19:58:27,222 INFO L861 garLoopResultBuilder]: At program point L113-1(lines 32 118) the Hoare annotation is: true [2021-11-25 19:58:27,222 INFO L861 garLoopResultBuilder]: At program point L122(lines 6 123) the Hoare annotation is: true [2021-11-25 19:58:27,222 INFO L858 garLoopResultBuilder]: For program point L89(line 89) no Hoare annotation was computed. [2021-11-25 19:58:27,222 INFO L858 garLoopResultBuilder]: For program point L114(line 114) no Hoare annotation was computed. [2021-11-25 19:58:27,222 INFO L854 garLoopResultBuilder]: At program point L114-1(lines 7 123) the Hoare annotation is: false [2021-11-25 19:58:27,223 INFO L858 garLoopResultBuilder]: For program point L98-1(lines 32 118) no Hoare annotation was computed. [2021-11-25 19:58:27,223 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 121) no Hoare annotation was computed. [2021-11-25 19:58:27,223 INFO L858 garLoopResultBuilder]: For program point L99(line 99) no Hoare annotation was computed. [2021-11-25 19:58:27,223 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-25 19:58:27,223 INFO L858 garLoopResultBuilder]: For program point L83-1(lines 32 118) no Hoare annotation was computed. [2021-11-25 19:58:27,223 INFO L858 garLoopResultBuilder]: For program point L108-1(lines 32 118) no Hoare annotation was computed. [2021-11-25 19:58:27,224 INFO L858 garLoopResultBuilder]: For program point L34(lines 34 36) no Hoare annotation was computed. [2021-11-25 19:58:27,224 INFO L858 garLoopResultBuilder]: For program point L84(line 84) no Hoare annotation was computed. [2021-11-25 19:58:27,224 INFO L858 garLoopResultBuilder]: For program point L109(line 109) no Hoare annotation was computed. [2021-11-25 19:58:27,228 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:27,230 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 19:58:27,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 07:58:27 BoogieIcfgContainer [2021-11-25 19:58:27,239 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 19:58:27,240 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 19:58:27,240 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 19:58:27,240 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 19:58:27,241 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:58:25" (3/4) ... [2021-11-25 19:58:27,244 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 19:58:27,256 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-11-25 19:58:27,257 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-11-25 19:58:27,257 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-25 19:58:27,258 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 19:58:27,299 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 19:58:27,300 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 19:58:27,301 INFO L158 Benchmark]: Toolchain (without parser) took 2351.21ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 53.2MB in the beginning and 50.0MB in the end (delta: 3.2MB). Peak memory consumption was 22.0MB. Max. memory is 16.1GB. [2021-11-25 19:58:27,301 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 94.4MB. Free memory was 69.7MB in the beginning and 69.7MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:58:27,301 INFO L158 Benchmark]: CACSL2BoogieTranslator took 372.94ms. Allocated memory is still 94.4MB. Free memory was 53.0MB in the beginning and 70.1MB in the end (delta: -17.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 19:58:27,302 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.74ms. Allocated memory is still 94.4MB. Free memory was 70.1MB in the beginning and 68.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:58:27,302 INFO L158 Benchmark]: Boogie Preprocessor took 45.89ms. Allocated memory is still 94.4MB. Free memory was 68.4MB in the beginning and 67.4MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:58:27,303 INFO L158 Benchmark]: RCFGBuilder took 466.10ms. Allocated memory is still 94.4MB. Free memory was 67.4MB in the beginning and 53.4MB in the end (delta: 14.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 19:58:27,303 INFO L158 Benchmark]: TraceAbstraction took 1352.56ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 53.1MB in the beginning and 53.4MB in the end (delta: -309.4kB). Peak memory consumption was 22.0MB. Max. memory is 16.1GB. [2021-11-25 19:58:27,304 INFO L158 Benchmark]: Witness Printer took 60.12ms. Allocated memory is still 113.2MB. Free memory was 53.4MB in the beginning and 50.0MB in the end (delta: 3.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:58:27,306 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 94.4MB. Free memory was 69.7MB in the beginning and 69.7MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 372.94ms. Allocated memory is still 94.4MB. Free memory was 53.0MB in the beginning and 70.1MB in the end (delta: -17.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.74ms. Allocated memory is still 94.4MB. Free memory was 70.1MB in the beginning and 68.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.89ms. Allocated memory is still 94.4MB. Free memory was 68.4MB in the beginning and 67.4MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 466.10ms. Allocated memory is still 94.4MB. Free memory was 67.4MB in the beginning and 53.4MB in the end (delta: 14.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1352.56ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 53.1MB in the beginning and 53.4MB in the end (delta: -309.4kB). Peak memory consumption was 22.0MB. Max. memory is 16.1GB. * Witness Printer took 60.12ms. Allocated memory is still 113.2MB. Free memory was 53.4MB in the beginning and 50.0MB in the end (delta: 3.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 121]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.3s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 156 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 156 mSDsluCounter, 435 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 266 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 87 IncrementalHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 171 mSDtfsCounter, 87 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 66 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 9 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 238 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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 1 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-25 19:58:27,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23b5a50c-5f75-4bf2-bcda-02cef82509ba/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE