./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/17_szymanski.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/17_szymanski.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/bin/utaipan-mTDlp9Zugs --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 9c051ca3a402db468e0ce05dfc38d0dfe3d0c9a7 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:19:56,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:19:56,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:19:56,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:19:56,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:19:56,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:19:56,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:19:56,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:19:56,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:19:56,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:19:56,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:19:56,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:19:56,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:19:56,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:19:56,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:19:56,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:19:56,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:19:56,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:19:56,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:19:56,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:19:56,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:19:56,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:19:56,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:19:56,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:19:56,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:19:56,730 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:19:56,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:19:56,733 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:19:56,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:19:56,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:19:56,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:19:56,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:19:56,741 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:19:56,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:19:56,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:19:56,745 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:19:56,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:19:56,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:19:56,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:19:56,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:19:56,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:19:56,753 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 03:19:56,819 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:19:56,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:19:56,821 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:19:56,821 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:19:56,822 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:19:56,822 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:19:56,822 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 03:19:56,830 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:19:56,830 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:19:56,831 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 03:19:56,832 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 03:19:56,832 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:19:56,833 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 03:19:56,833 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 03:19:56,833 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 03:19:56,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:19:56,834 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:19:56,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:19:56,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:19:56,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:19:56,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:19:56,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:19:56,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:19:56,836 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:19:56,836 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:19:56,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:19:56,837 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:19:56,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:19:56,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:19:56,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:19:56,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:19:56,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:19:56,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:19:56,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:19:56,841 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 03:19:56,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 03:19:56,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:19:56,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:19:56,842 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:19:56,842 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_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c051ca3a402db468e0ce05dfc38d0dfe3d0c9a7 [2021-10-16 03:19:57,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:19:57,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:19:57,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:19:57,159 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:19:57,160 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:19:57,161 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/pthread-ext/17_szymanski.i [2021-10-16 03:19:57,221 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/bin/utaipan-mTDlp9Zugs/data/ea1667bd2/1e1ce9462f374a64890d57bcd6d04903/FLAG78c5f4339 [2021-10-16 03:19:57,728 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:19:57,729 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/sv-benchmarks/c/pthread-ext/17_szymanski.i [2021-10-16 03:19:57,747 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/bin/utaipan-mTDlp9Zugs/data/ea1667bd2/1e1ce9462f374a64890d57bcd6d04903/FLAG78c5f4339 [2021-10-16 03:19:58,237 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/bin/utaipan-mTDlp9Zugs/data/ea1667bd2/1e1ce9462f374a64890d57bcd6d04903 [2021-10-16 03:19:58,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:19:58,241 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:19:58,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:19:58,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:19:58,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:19:58,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:19:58" (1/1) ... [2021-10-16 03:19:58,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b011085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:58, skipping insertion in model container [2021-10-16 03:19:58,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:19:58" (1/1) ... [2021-10-16 03:19:58,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:19:58,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:19:58,774 WARN L228 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_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/sv-benchmarks/c/pthread-ext/17_szymanski.i[30132,30145] [2021-10-16 03:19:58,787 WARN L228 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_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/sv-benchmarks/c/pthread-ext/17_szymanski.i[30481,30494] [2021-10-16 03:19:58,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:19:58,807 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:19:58,875 WARN L228 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_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/sv-benchmarks/c/pthread-ext/17_szymanski.i[30132,30145] [2021-10-16 03:19:58,880 WARN L228 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_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/sv-benchmarks/c/pthread-ext/17_szymanski.i[30481,30494] [2021-10-16 03:19:58,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:19:58,956 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:19:58,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:58 WrapperNode [2021-10-16 03:19:58,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:19:58,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:19:58,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:19:58,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:19:58,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:58" (1/1) ... [2021-10-16 03:19:59,007 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:58" (1/1) ... [2021-10-16 03:19:59,044 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:19:59,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:19:59,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:19:59,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:19:59,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:58" (1/1) ... [2021-10-16 03:19:59,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:58" (1/1) ... [2021-10-16 03:19:59,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:58" (1/1) ... [2021-10-16 03:19:59,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:58" (1/1) ... [2021-10-16 03:19:59,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:58" (1/1) ... [2021-10-16 03:19:59,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:58" (1/1) ... [2021-10-16 03:19:59,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:58" (1/1) ... [2021-10-16 03:19:59,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:19:59,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:19:59,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:19:59,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:19:59,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:58" (1/1) ... [2021-10-16 03:19:59,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:19:59,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:19:59,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:19:59,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:19:59,194 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2021-10-16 03:19:59,194 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2021-10-16 03:19:59,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 03:19:59,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:19:59,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 03:19:59,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 03:19:59,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:19:59,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:19:59,197 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-16 03:19:59,631 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:19:59,631 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-10-16 03:19:59,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:19:59 BoogieIcfgContainer [2021-10-16 03:19:59,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:19:59,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:19:59,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:19:59,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:19:59,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:19:58" (1/3) ... [2021-10-16 03:19:59,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bbf9f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:19:59, skipping insertion in model container [2021-10-16 03:19:59,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:58" (2/3) ... [2021-10-16 03:19:59,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bbf9f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:19:59, skipping insertion in model container [2021-10-16 03:19:59,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:19:59" (3/3) ... [2021-10-16 03:19:59,648 INFO L111 eAbstractionObserver]: Analyzing ICFG 17_szymanski.i [2021-10-16 03:19:59,655 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-16 03:19:59,656 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:19:59,656 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-16 03:19:59,656 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-16 03:19:59,695 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:19:59,695 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:19:59,696 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:19:59,696 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:19:59,696 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:19:59,697 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:19:59,697 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:19:59,698 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:19:59,698 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:19:59,698 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:19:59,699 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:19:59,699 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:19:59,710 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:19:59,711 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:19:59,713 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:19:59,713 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 03:19:59,722 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-10-16 03:19:59,795 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:19:59,801 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, mConcurrency=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 [2021-10-16 03:19:59,801 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-16 03:19:59,816 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-16 03:19:59,826 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 91 transitions, 187 flow [2021-10-16 03:19:59,829 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 91 transitions, 187 flow [2021-10-16 03:19:59,831 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 71 places, 91 transitions, 187 flow [2021-10-16 03:19:59,868 INFO L129 PetriNetUnfolder]: 24/90 cut-off events. [2021-10-16 03:19:59,868 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-16 03:19:59,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 90 events. 24/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 130 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 73. Up to 3 conditions per place. [2021-10-16 03:19:59,879 INFO L116 LiptonReduction]: Number of co-enabled transitions 2604 [2021-10-16 03:20:01,719 INFO L131 LiptonReduction]: Checked pairs total: 5033 [2021-10-16 03:20:01,722 INFO L133 LiptonReduction]: Total number of compositions: 52 [2021-10-16 03:20:01,734 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 51 transitions, 107 flow [2021-10-16 03:20:01,772 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 226 states, 223 states have (on average 3.2286995515695067) internal successors, (720), 225 states have internal predecessors, (720), 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) [2021-10-16 03:20:01,781 INFO L276 IsEmpty]: Start isEmpty. Operand has 226 states, 223 states have (on average 3.2286995515695067) internal successors, (720), 225 states have internal predecessors, (720), 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) [2021-10-16 03:20:01,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 03:20:01,790 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:20:01,791 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:20:01,791 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:20:01,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:20:01,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1294483565, now seen corresponding path program 1 times [2021-10-16 03:20:01,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:20:01,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123556292] [2021-10-16 03:20:01,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:20:01,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:20:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:20:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:20:02,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:20:02,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123556292] [2021-10-16 03:20:02,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123556292] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:20:02,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:20:02,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:20:02,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9223444] [2021-10-16 03:20:02,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 03:20:02,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:20:02,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 03:20:02,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:20:02,117 INFO L87 Difference]: Start difference. First operand has 226 states, 223 states have (on average 3.2286995515695067) internal successors, (720), 225 states have internal predecessors, (720), 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 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2021-10-16 03:20:02,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:20:02,161 INFO L93 Difference]: Finished difference Result 198 states and 534 transitions. [2021-10-16 03:20:02,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 03:20:02,163 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 [2021-10-16 03:20:02,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:20:02,186 INFO L225 Difference]: With dead ends: 198 [2021-10-16 03:20:02,186 INFO L226 Difference]: Without dead ends: 198 [2021-10-16 03:20:02,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:20:02,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-16 03:20:02,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-10-16 03:20:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.7106598984771573) internal successors, (534), 197 states have internal predecessors, (534), 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) [2021-10-16 03:20:02,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 534 transitions. [2021-10-16 03:20:02,284 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 534 transitions. Word has length 9 [2021-10-16 03:20:02,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:20:02,285 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 534 transitions. [2021-10-16 03:20:02,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2021-10-16 03:20:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 534 transitions. [2021-10-16 03:20:02,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 03:20:02,291 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:20:02,292 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:20:02,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 03:20:02,293 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:20:02,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:20:02,294 INFO L82 PathProgramCache]: Analyzing trace with hash -749712940, now seen corresponding path program 1 times [2021-10-16 03:20:02,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:20:02,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440010284] [2021-10-16 03:20:02,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:20:02,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:20:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:20:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:20:02,457 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:20:02,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440010284] [2021-10-16 03:20:02,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440010284] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:20:02,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:20:02,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:20:02,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851302035] [2021-10-16 03:20:02,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:20:02,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:20:02,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:20:02,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:20:02,466 INFO L87 Difference]: Start difference. First operand 198 states and 534 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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) [2021-10-16 03:20:02,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:20:02,509 INFO L93 Difference]: Finished difference Result 362 states and 979 transitions. [2021-10-16 03:20:02,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:20:02,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 [2021-10-16 03:20:02,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:20:02,517 INFO L225 Difference]: With dead ends: 362 [2021-10-16 03:20:02,517 INFO L226 Difference]: Without dead ends: 362 [2021-10-16 03:20:02,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:20:02,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-10-16 03:20:02,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 221. [2021-10-16 03:20:02,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.6772727272727272) internal successors, (589), 220 states have internal predecessors, (589), 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) [2021-10-16 03:20:02,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 589 transitions. [2021-10-16 03:20:02,570 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 589 transitions. Word has length 11 [2021-10-16 03:20:02,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:20:02,571 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 589 transitions. [2021-10-16 03:20:02,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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) [2021-10-16 03:20:02,571 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 589 transitions. [2021-10-16 03:20:02,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 03:20:02,572 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:20:02,572 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:20:02,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 03:20:02,573 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:20:02,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:20:02,573 INFO L82 PathProgramCache]: Analyzing trace with hash 264610578, now seen corresponding path program 1 times [2021-10-16 03:20:02,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:20:02,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76347301] [2021-10-16 03:20:02,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:20:02,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:20:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:20:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:20:02,643 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:20:02,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76347301] [2021-10-16 03:20:02,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76347301] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:20:02,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:20:02,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:20:02,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345564470] [2021-10-16 03:20:02,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:20:02,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:20:02,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:20:02,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:20:02,651 INFO L87 Difference]: Start difference. First operand 221 states and 589 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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) [2021-10-16 03:20:02,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:20:02,673 INFO L93 Difference]: Finished difference Result 348 states and 934 transitions. [2021-10-16 03:20:02,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:20:02,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 [2021-10-16 03:20:02,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:20:02,678 INFO L225 Difference]: With dead ends: 348 [2021-10-16 03:20:02,678 INFO L226 Difference]: Without dead ends: 348 [2021-10-16 03:20:02,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:20:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-10-16 03:20:02,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 218. [2021-10-16 03:20:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 218 states have (on average 2.5688073394495414) internal successors, (560), 217 states have internal predecessors, (560), 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) [2021-10-16 03:20:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 560 transitions. [2021-10-16 03:20:02,696 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 560 transitions. Word has length 11 [2021-10-16 03:20:02,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:20:02,696 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 560 transitions. [2021-10-16 03:20:02,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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) [2021-10-16 03:20:02,697 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 560 transitions. [2021-10-16 03:20:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 03:20:02,704 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:20:02,704 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:20:02,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 03:20:02,705 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:20:02,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:20:02,705 INFO L82 PathProgramCache]: Analyzing trace with hash -556591701, now seen corresponding path program 1 times [2021-10-16 03:20:02,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:20:02,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818765850] [2021-10-16 03:20:02,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:20:02,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:20:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:20:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:20:02,782 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:20:02,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818765850] [2021-10-16 03:20:02,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818765850] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:20:02,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:20:02,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 03:20:02,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449925203] [2021-10-16 03:20:02,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:20:02,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:20:02,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:20:02,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:20:02,786 INFO L87 Difference]: Start difference. First operand 218 states and 560 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-10-16 03:20:02,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:20:02,829 INFO L93 Difference]: Finished difference Result 234 states and 577 transitions. [2021-10-16 03:20:02,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:20:02,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 19 [2021-10-16 03:20:02,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:20:02,832 INFO L225 Difference]: With dead ends: 234 [2021-10-16 03:20:02,832 INFO L226 Difference]: Without dead ends: 234 [2021-10-16 03:20:02,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:20:02,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-10-16 03:20:02,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2021-10-16 03:20:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 230 states have (on average 2.473913043478261) internal successors, (569), 229 states have internal predecessors, (569), 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) [2021-10-16 03:20:02,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 569 transitions. [2021-10-16 03:20:02,843 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 569 transitions. Word has length 19 [2021-10-16 03:20:02,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:20:02,844 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 569 transitions. [2021-10-16 03:20:02,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-10-16 03:20:02,844 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 569 transitions. [2021-10-16 03:20:02,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 03:20:02,845 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:20:02,845 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:20:02,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 03:20:02,846 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:20:02,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:20:02,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1007776461, now seen corresponding path program 2 times [2021-10-16 03:20:02,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:20:02,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977347648] [2021-10-16 03:20:02,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:20:02,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:20:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:20:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:20:02,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:20:02,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977347648] [2021-10-16 03:20:02,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977347648] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:20:02,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:20:02,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 03:20:02,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749121] [2021-10-16 03:20:02,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:20:02,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:20:02,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:20:02,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:20:02,918 INFO L87 Difference]: Start difference. First operand 230 states and 569 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-10-16 03:20:02,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:20:02,962 INFO L93 Difference]: Finished difference Result 228 states and 553 transitions. [2021-10-16 03:20:02,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:20:02,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 19 [2021-10-16 03:20:02,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:20:02,966 INFO L225 Difference]: With dead ends: 228 [2021-10-16 03:20:02,966 INFO L226 Difference]: Without dead ends: 228 [2021-10-16 03:20:02,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:20:02,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-10-16 03:20:02,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2021-10-16 03:20:02,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 228 states have (on average 2.425438596491228) internal successors, (553), 227 states have internal predecessors, (553), 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) [2021-10-16 03:20:02,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 553 transitions. [2021-10-16 03:20:02,975 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 553 transitions. Word has length 19 [2021-10-16 03:20:02,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:20:02,976 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 553 transitions. [2021-10-16 03:20:02,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-10-16 03:20:02,976 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 553 transitions. [2021-10-16 03:20:02,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 03:20:02,977 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:20:02,977 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:20:02,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 03:20:02,978 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION (and 1 more)] === [2021-10-16 03:20:02,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:20:02,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2033368335, now seen corresponding path program 3 times [2021-10-16 03:20:02,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:20:02,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181146842] [2021-10-16 03:20:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:20:02,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:20:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:20:03,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:20:03,043 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:20:03,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181146842] [2021-10-16 03:20:03,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181146842] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:20:03,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:20:03,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 03:20:03,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764770469] [2021-10-16 03:20:03,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:20:03,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:20:03,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:20:03,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:20:03,051 INFO L87 Difference]: Start difference. First operand 228 states and 553 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-10-16 03:20:03,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:20:03,081 INFO L93 Difference]: Finished difference Result 194 states and 463 transitions. [2021-10-16 03:20:03,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:20:03,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 19 [2021-10-16 03:20:03,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:20:03,082 INFO L225 Difference]: With dead ends: 194 [2021-10-16 03:20:03,083 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 03:20:03,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:20:03,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 03:20:03,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 03:20:03,083 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) [2021-10-16 03:20:03,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 03:20:03,084 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-10-16 03:20:03,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:20:03,084 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 03:20:03,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-10-16 03:20:03,084 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 03:20:03,084 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 03:20:03,087 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:20:03,087 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:20:03,087 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-16 03:20:03,087 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:20:03,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 03:20:03,093 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-16 03:20:03,093 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:20:03,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:20:03 BasicIcfg [2021-10-16 03:20:03,096 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:20:03,096 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:20:03,097 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:20:03,097 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:20:03,097 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:19:59" (3/4) ... [2021-10-16 03:20:03,099 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 03:20:03,105 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thr1 [2021-10-16 03:20:03,111 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-16 03:20:03,111 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-16 03:20:03,111 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 03:20:03,111 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 03:20:03,142 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 03:20:03,142 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:20:03,143 INFO L168 Benchmark]: Toolchain (without parser) took 4901.60 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 56.7 MB in the beginning and 45.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 28.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:20:03,144 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 94.4 MB. Free memory was 74.6 MB in the beginning and 74.6 MB in the end (delta: 43.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:20:03,144 INFO L168 Benchmark]: CACSL2BoogieTranslator took 708.64 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 56.5 MB in the beginning and 78.5 MB in the end (delta: -22.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 03:20:03,145 INFO L168 Benchmark]: Boogie Procedure Inliner took 85.32 ms. Allocated memory is still 113.2 MB. Free memory was 78.5 MB in the beginning and 76.7 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:20:03,145 INFO L168 Benchmark]: Boogie Preprocessor took 34.54 ms. Allocated memory is still 113.2 MB. Free memory was 76.7 MB in the beginning and 75.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 03:20:03,145 INFO L168 Benchmark]: RCFGBuilder took 553.83 ms. Allocated memory is still 113.2 MB. Free memory was 75.4 MB in the beginning and 63.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 03:20:03,146 INFO L168 Benchmark]: TraceAbstraction took 3459.95 ms. Allocated memory is still 113.2 MB. Free memory was 62.8 MB in the beginning and 48.4 MB in the end (delta: 14.4 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2021-10-16 03:20:03,146 INFO L168 Benchmark]: Witness Printer took 45.39 ms. Allocated memory is still 113.2 MB. Free memory was 48.4 MB in the beginning and 45.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:20:03,149 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 94.4 MB. Free memory was 74.6 MB in the beginning and 74.6 MB in the end (delta: 43.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 708.64 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 56.5 MB in the beginning and 78.5 MB in the end (delta: -22.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 85.32 ms. Allocated memory is still 113.2 MB. Free memory was 78.5 MB in the beginning and 76.7 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.54 ms. Allocated memory is still 113.2 MB. Free memory was 76.7 MB in the beginning and 75.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 553.83 ms. Allocated memory is still 113.2 MB. Free memory was 75.4 MB in the beginning and 63.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3459.95 ms. Allocated memory is still 113.2 MB. Free memory was 62.8 MB in the beginning and 48.4 MB in the end (delta: 14.4 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. * Witness Printer took 45.39 ms. Allocated memory is still 113.2 MB. Free memory was 48.4 MB in the beginning and 45.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1893.3ms, 71 PlacesBefore, 35 PlacesAfterwards, 91 TransitionsBefore, 51 TransitionsAfterwards, 2604 CoEnabledTransitionPairs, 5 FixpointIterations, 15 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 4 ChoiceCompositions, 52 TotalNumberOfCompositions, 5033 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2229, positive: 2085, positive conditional: 0, positive unconditional: 2085, negative: 144, negative conditional: 0, negative unconditional: 144, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1295, positive: 1266, positive conditional: 0, positive unconditional: 1266, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1295, positive: 1231, positive conditional: 0, positive unconditional: 1231, negative: 64, negative conditional: 0, negative unconditional: 64, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 64, positive: 35, positive conditional: 0, positive unconditional: 35, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 110, positive: 60, positive conditional: 0, positive unconditional: 60, negative: 51, negative conditional: 0, negative unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2229, positive: 819, positive conditional: 0, positive unconditional: 819, negative: 115, negative conditional: 0, negative unconditional: 115, unknown: 1295, unknown conditional: 0, unknown unconditional: 1295] , Statistics on independence cache: Total cache size (in pairs): 187, Positive cache size: 162, Positive conditional cache size: 0, Positive unconditional cache size: 162, Negative cache size: 25, Negative conditional cache size: 0, Negative unconditional cache size: 25 - 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 - PositiveResult [Line: 698]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 716]: 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 with 1 thread instances CFG has 3 procedures, 89 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 3298.1ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 29.3ms, AutomataDifference: 311.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1973.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 314 SDtfs, 131 SDslu, 117 SDs, 0 SdLazy, 76 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 85.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=230occurred in iteration=4, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 167.7ms AutomataMinimizationTime, 6 MinimizatonAttempts, 275 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 31.2ms SsaConstructionTime, 146.6ms SatisfiabilityAnalysisTime, 363.7ms InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 82 ConstructedInterpolants, 0 QuantifiedInterpolants, 108 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-16 03:20:03,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc0ef71-ba46-4ecb-b5d5-30f0d482325c/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...