./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:04:51,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:04:51,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:04:51,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:04:51,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:04:51,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:04:51,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:04:51,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:04:51,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:04:51,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:04:51,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:04:51,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:04:51,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:04:51,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:04:51,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:04:51,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:04:51,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:04:51,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:04:51,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:04:51,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:04:51,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:04:51,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:04:51,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:04:51,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:04:51,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:04:51,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:04:51,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:04:51,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:04:51,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:04:51,833 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:04:51,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:04:51,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:04:51,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:04:51,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:04:51,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:04:51,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:04:51,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:04:51,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:04:51,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:04:51,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:04:51,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:04:51,843 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 11:04:51,866 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:04:51,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:04:51,867 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:04:51,867 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:04:51,868 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:04:51,868 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:04:51,869 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:04:51,869 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:04:51,869 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:04:51,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:04:51,870 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:04:51,870 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:04:51,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:04:51,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:04:51,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:04:51,872 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:04:51,872 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:04:51,872 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:04:51,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:04:51,873 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:04:51,873 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:04:51,873 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:04:51,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:04:51,874 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:04:51,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:04:51,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:04:51,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:04:51,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:04:51,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:04:51,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:04:51,876 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 [2022-11-20 11:04:52,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:04:52,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:04:52,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:04:52,143 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:04:52,144 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:04:52,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2022-11-20 11:04:55,396 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:04:55,758 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:04:55,759 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2022-11-20 11:04:55,774 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/data/61ec246f2/ed8226c5fa444f26a6a9ff0e5d50e3a8/FLAGad89a76dc [2022-11-20 11:04:55,791 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/data/61ec246f2/ed8226c5fa444f26a6a9ff0e5d50e3a8 [2022-11-20 11:04:55,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:04:55,796 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:04:55,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:04:55,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:04:55,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:04:55,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:04:55" (1/1) ... [2022-11-20 11:04:55,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53809df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:55, skipping insertion in model container [2022-11-20 11:04:55,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:04:55" (1/1) ... [2022-11-20 11:04:55,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:04:55,855 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:04:56,251 WARN L237 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_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i[30176,30189] [2022-11-20 11:04:56,279 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:04:56,299 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:04:56,367 WARN L237 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_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i[30176,30189] [2022-11-20 11:04:56,377 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:04:56,419 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:04:56,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:56 WrapperNode [2022-11-20 11:04:56,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:04:56,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:04:56,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:04:56,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:04:56,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:56" (1/1) ... [2022-11-20 11:04:56,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:56" (1/1) ... [2022-11-20 11:04:56,510 INFO L138 Inliner]: procedures = 171, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2022-11-20 11:04:56,511 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:04:56,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:04:56,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:04:56,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:04:56,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:56" (1/1) ... [2022-11-20 11:04:56,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:56" (1/1) ... [2022-11-20 11:04:56,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:56" (1/1) ... [2022-11-20 11:04:56,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:56" (1/1) ... [2022-11-20 11:04:56,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:56" (1/1) ... [2022-11-20 11:04:56,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:56" (1/1) ... [2022-11-20 11:04:56,569 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:56" (1/1) ... [2022-11-20 11:04:56,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:56" (1/1) ... [2022-11-20 11:04:56,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:04:56,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:04:56,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:04:56,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:04:56,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:56" (1/1) ... [2022-11-20 11:04:56,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:04:56,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:56,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:04:56,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:04:56,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:04:56,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:04:56,664 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 11:04:56,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:04:56,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:04:56,665 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-20 11:04:56,666 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-20 11:04:56,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:04:56,666 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2022-11-20 11:04:56,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:04:56,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:04:56,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:04:56,669 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:04:56,821 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:04:56,835 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:04:57,135 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:04:57,145 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:04:57,145 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-20 11:04:57,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:04:57 BoogieIcfgContainer [2022-11-20 11:04:57,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:04:57,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:04:57,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:04:57,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:04:57,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:04:55" (1/3) ... [2022-11-20 11:04:57,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c0d018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:04:57, skipping insertion in model container [2022-11-20 11:04:57,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:56" (2/3) ... [2022-11-20 11:04:57,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c0d018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:04:57, skipping insertion in model container [2022-11-20 11:04:57,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:04:57" (3/3) ... [2022-11-20 11:04:57,161 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2022-11-20 11:04:57,186 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:04:57,187 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-20 11:04:57,187 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:04:57,274 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-20 11:04:57,315 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 11:04:57,332 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 117 transitions, 242 flow [2022-11-20 11:04:57,336 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 117 transitions, 242 flow [2022-11-20 11:04:57,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 117 transitions, 242 flow [2022-11-20 11:04:57,425 INFO L130 PetriNetUnfolder]: 21/164 cut-off events. [2022-11-20 11:04:57,425 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:04:57,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 164 events. 21/164 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 447 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 80. Up to 6 conditions per place. [2022-11-20 11:04:57,437 INFO L119 LiptonReduction]: Number of co-enabled transitions 2968 [2022-11-20 11:05:01,475 INFO L134 LiptonReduction]: Checked pairs total: 4675 [2022-11-20 11:05:01,475 INFO L136 LiptonReduction]: Total number of compositions: 105 [2022-11-20 11:05:01,486 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 39 transitions, 86 flow [2022-11-20 11:05:01,527 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 197 states, 182 states have (on average 2.697802197802198) internal successors, (491), 196 states have internal predecessors, (491), 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) [2022-11-20 11:05:01,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:05:01,560 INFO L357 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@66a58ab3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:05:01,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-20 11:05:01,564 INFO L276 IsEmpty]: Start isEmpty. Operand has 197 states, 182 states have (on average 2.697802197802198) internal successors, (491), 196 states have internal predecessors, (491), 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) [2022-11-20 11:05:01,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:05:01,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:01,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:05:01,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-20 11:05:01,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:01,580 INFO L85 PathProgramCache]: Analyzing trace with hash 14642, now seen corresponding path program 1 times [2022-11-20 11:05:01,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:01,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885627819] [2022-11-20 11:05:01,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:01,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:01,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:01,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885627819] [2022-11-20 11:05:01,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885627819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:01,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:01,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:05:01,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663961033] [2022-11-20 11:05:01,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:01,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:01,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:01,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:01,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:01,866 INFO L87 Difference]: Start difference. First operand has 197 states, 182 states have (on average 2.697802197802198) internal successors, (491), 196 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-20 11:05:01,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:01,953 INFO L93 Difference]: Finished difference Result 175 states and 321 transitions. [2022-11-20 11:05:01,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:01,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-20 11:05:01,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:01,969 INFO L225 Difference]: With dead ends: 175 [2022-11-20 11:05:01,970 INFO L226 Difference]: Without dead ends: 164 [2022-11-20 11:05:01,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:01,975 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 26 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:01,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 3 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:05:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-20 11:05:02,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-11-20 11:05:02,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 155 states have (on average 1.9419354838709677) internal successors, (301), 163 states have internal predecessors, (301), 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) [2022-11-20 11:05:02,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 301 transitions. [2022-11-20 11:05:02,032 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 301 transitions. Word has length 2 [2022-11-20 11:05:02,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:02,033 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 301 transitions. [2022-11-20 11:05:02,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-20 11:05:02,033 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 301 transitions. [2022-11-20 11:05:02,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:05:02,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:02,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:05:02,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:05:02,035 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-20 11:05:02,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:02,036 INFO L85 PathProgramCache]: Analyzing trace with hash 14643, now seen corresponding path program 1 times [2022-11-20 11:05:02,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:02,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098487259] [2022-11-20 11:05:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:02,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:02,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:02,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098487259] [2022-11-20 11:05:02,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098487259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:02,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:02,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:05:02,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413064688] [2022-11-20 11:05:02,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:02,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:02,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:02,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:02,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:02,257 INFO L87 Difference]: Start difference. First operand 164 states and 301 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-20 11:05:02,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:02,349 INFO L93 Difference]: Finished difference Result 157 states and 292 transitions. [2022-11-20 11:05:02,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:02,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-20 11:05:02,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:02,351 INFO L225 Difference]: With dead ends: 157 [2022-11-20 11:05:02,352 INFO L226 Difference]: Without dead ends: 157 [2022-11-20 11:05:02,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:02,357 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:02,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 4 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:05:02,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-20 11:05:02,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-11-20 11:05:02,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 156 states have internal predecessors, (292), 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) [2022-11-20 11:05:02,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 292 transitions. [2022-11-20 11:05:02,378 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 292 transitions. Word has length 2 [2022-11-20 11:05:02,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:02,378 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 292 transitions. [2022-11-20 11:05:02,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-20 11:05:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 292 transitions. [2022-11-20 11:05:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:05:02,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:02,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:05:02,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:05:02,380 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-20 11:05:02,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:02,380 INFO L85 PathProgramCache]: Analyzing trace with hash 436492783, now seen corresponding path program 1 times [2022-11-20 11:05:02,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:02,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896599976] [2022-11-20 11:05:02,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:02,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:02,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:02,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896599976] [2022-11-20 11:05:02,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896599976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:02,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982801829] [2022-11-20 11:05:02,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:02,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:02,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:02,579 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:02,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:05:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:02,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:05:02,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:02,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:05:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:02,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:03,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982801829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:03,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:03,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-20 11:05:03,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303648911] [2022-11-20 11:05:03,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:03,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:05:03,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:03,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:05:03,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:05:03,062 INFO L87 Difference]: Start difference. First operand 157 states and 292 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2022-11-20 11:05:03,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:03,162 INFO L93 Difference]: Finished difference Result 43 states and 69 transitions. [2022-11-20 11:05:03,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:05:03,163 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 11:05:03,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:03,166 INFO L225 Difference]: With dead ends: 43 [2022-11-20 11:05:03,166 INFO L226 Difference]: Without dead ends: 43 [2022-11-20 11:05:03,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:05:03,168 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 63 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:03,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 7 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:05:03,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-20 11:05:03,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-20 11:05:03,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 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) [2022-11-20 11:05:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 69 transitions. [2022-11-20 11:05:03,177 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 69 transitions. Word has length 5 [2022-11-20 11:05:03,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:03,179 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 69 transitions. [2022-11-20 11:05:03,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2022-11-20 11:05:03,179 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 69 transitions. [2022-11-20 11:05:03,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:05:03,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:03,182 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-20 11:05:03,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 11:05:03,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:03,383 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-20 11:05:03,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:03,384 INFO L85 PathProgramCache]: Analyzing trace with hash 646374644, now seen corresponding path program 1 times [2022-11-20 11:05:03,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:03,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137746062] [2022-11-20 11:05:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:03,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:05:03,411 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:05:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:05:03,475 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:05:03,478 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:05:03,480 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-20 11:05:03,482 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-20 11:05:03,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-20 11:05:03,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-20 11:05:03,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-20 11:05:03,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-20 11:05:03,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-20 11:05:03,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:05:03,488 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 11:05:03,491 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:05:03,491 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 11:05:03,534 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:05:03,537 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 11:05:03,538 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 131 places, 147 transitions, 312 flow [2022-11-20 11:05:03,545 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 131 places, 147 transitions, 312 flow [2022-11-20 11:05:03,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 147 transitions, 312 flow [2022-11-20 11:05:03,625 INFO L130 PetriNetUnfolder]: 37/271 cut-off events. [2022-11-20 11:05:03,625 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 11:05:03,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 271 events. 37/271 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 857 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 166. Up to 9 conditions per place. [2022-11-20 11:05:03,637 INFO L119 LiptonReduction]: Number of co-enabled transitions 8120 [2022-11-20 11:05:07,493 INFO L134 LiptonReduction]: Checked pairs total: 17293 [2022-11-20 11:05:07,493 INFO L136 LiptonReduction]: Total number of compositions: 124 [2022-11-20 11:05:07,494 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 62 transitions, 142 flow [2022-11-20 11:05:07,645 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3090 states, 3064 states have (on average 3.8051566579634466) internal successors, (11659), 3089 states have internal predecessors, (11659), 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) [2022-11-20 11:05:07,655 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:05:07,659 INFO L357 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@66a58ab3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:05:07,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-20 11:05:07,676 INFO L276 IsEmpty]: Start isEmpty. Operand has 3090 states, 3064 states have (on average 3.8051566579634466) internal successors, (11659), 3089 states have internal predecessors, (11659), 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) [2022-11-20 11:05:07,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:05:07,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:07,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:05:07,678 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-20 11:05:07,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:07,678 INFO L85 PathProgramCache]: Analyzing trace with hash 24270, now seen corresponding path program 1 times [2022-11-20 11:05:07,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:07,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955340356] [2022-11-20 11:05:07,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:07,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:07,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:07,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955340356] [2022-11-20 11:05:07,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955340356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:07,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:07,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:05:07,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647892525] [2022-11-20 11:05:07,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:07,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:07,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:07,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:07,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:07,777 INFO L87 Difference]: Start difference. First operand has 3090 states, 3064 states have (on average 3.8051566579634466) internal successors, (11659), 3089 states have internal predecessors, (11659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-20 11:05:07,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:07,925 INFO L93 Difference]: Finished difference Result 2764 states and 7554 transitions. [2022-11-20 11:05:07,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:07,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-20 11:05:07,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:07,949 INFO L225 Difference]: With dead ends: 2764 [2022-11-20 11:05:07,949 INFO L226 Difference]: Without dead ends: 2595 [2022-11-20 11:05:07,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:07,953 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:07,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 17 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:05:07,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2022-11-20 11:05:08,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2595. [2022-11-20 11:05:08,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2595 states, 2580 states have (on average 2.7515503875968994) internal successors, (7099), 2594 states have internal predecessors, (7099), 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) [2022-11-20 11:05:08,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2595 states to 2595 states and 7099 transitions. [2022-11-20 11:05:08,091 INFO L78 Accepts]: Start accepts. Automaton has 2595 states and 7099 transitions. Word has length 2 [2022-11-20 11:05:08,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:08,092 INFO L495 AbstractCegarLoop]: Abstraction has 2595 states and 7099 transitions. [2022-11-20 11:05:08,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-20 11:05:08,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2595 states and 7099 transitions. [2022-11-20 11:05:08,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:05:08,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:08,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:05:08,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:05:08,094 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-20 11:05:08,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:08,094 INFO L85 PathProgramCache]: Analyzing trace with hash 24271, now seen corresponding path program 1 times [2022-11-20 11:05:08,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:08,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907528345] [2022-11-20 11:05:08,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:08,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:08,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:08,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907528345] [2022-11-20 11:05:08,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907528345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:08,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:08,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:05:08,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021033173] [2022-11-20 11:05:08,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:08,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:08,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:08,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:08,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:08,189 INFO L87 Difference]: Start difference. First operand 2595 states and 7099 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-20 11:05:08,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:08,346 INFO L93 Difference]: Finished difference Result 2588 states and 7090 transitions. [2022-11-20 11:05:08,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:08,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-20 11:05:08,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:08,364 INFO L225 Difference]: With dead ends: 2588 [2022-11-20 11:05:08,365 INFO L226 Difference]: Without dead ends: 2588 [2022-11-20 11:05:08,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:08,368 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:08,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 20 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:05:08,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2022-11-20 11:05:08,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2588. [2022-11-20 11:05:08,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2588 states, 2575 states have (on average 2.753398058252427) internal successors, (7090), 2587 states have internal predecessors, (7090), 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) [2022-11-20 11:05:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2588 states to 2588 states and 7090 transitions. [2022-11-20 11:05:08,486 INFO L78 Accepts]: Start accepts. Automaton has 2588 states and 7090 transitions. Word has length 2 [2022-11-20 11:05:08,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:08,486 INFO L495 AbstractCegarLoop]: Abstraction has 2588 states and 7090 transitions. [2022-11-20 11:05:08,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-20 11:05:08,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2588 states and 7090 transitions. [2022-11-20 11:05:08,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:05:08,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:08,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:05:08,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:05:08,489 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-20 11:05:08,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:08,490 INFO L85 PathProgramCache]: Analyzing trace with hash 956561243, now seen corresponding path program 1 times [2022-11-20 11:05:08,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:08,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165941383] [2022-11-20 11:05:08,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:08,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:08,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:08,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165941383] [2022-11-20 11:05:08,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165941383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:08,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45818645] [2022-11-20 11:05:08,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:08,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:08,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:08,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:08,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:05:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:08,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:05:08,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:08,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:05:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:08,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:08,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45818645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:08,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:08,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-20 11:05:08,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186849884] [2022-11-20 11:05:08,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:08,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:05:08,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:08,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:05:08,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:05:08,855 INFO L87 Difference]: Start difference. First operand 2588 states and 7090 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-11-20 11:05:09,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:09,008 INFO L93 Difference]: Finished difference Result 771 states and 1991 transitions. [2022-11-20 11:05:09,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:05:09,009 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 [2022-11-20 11:05:09,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:09,012 INFO L225 Difference]: With dead ends: 771 [2022-11-20 11:05:09,012 INFO L226 Difference]: Without dead ends: 771 [2022-11-20 11:05:09,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:05:09,014 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 169 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:09,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 41 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:05:09,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-11-20 11:05:09,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2022-11-20 11:05:09,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 2.585714285714286) internal successors, (1991), 770 states have internal predecessors, (1991), 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) [2022-11-20 11:05:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1991 transitions. [2022-11-20 11:05:09,037 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1991 transitions. Word has length 6 [2022-11-20 11:05:09,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:09,038 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 1991 transitions. [2022-11-20 11:05:09,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-11-20 11:05:09,038 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1991 transitions. [2022-11-20 11:05:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:05:09,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:09,039 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-20 11:05:09,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:09,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:09,247 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-20 11:05:09,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:09,247 INFO L85 PathProgramCache]: Analyzing trace with hash 669707413, now seen corresponding path program 1 times [2022-11-20 11:05:09,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:09,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264799218] [2022-11-20 11:05:09,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:09,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:05:09,271 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:05:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:05:09,303 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:05:09,303 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:05:09,303 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-20 11:05:09,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-20 11:05:09,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-20 11:05:09,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-20 11:05:09,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-20 11:05:09,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-20 11:05:09,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-20 11:05:09,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:05:09,306 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 11:05:09,307 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:05:09,307 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 11:05:09,350 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 11:05:09,356 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 11:05:09,360 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 177 transitions, 384 flow [2022-11-20 11:05:09,361 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 177 transitions, 384 flow [2022-11-20 11:05:09,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 177 transitions, 384 flow [2022-11-20 11:05:09,498 INFO L130 PetriNetUnfolder]: 58/421 cut-off events. [2022-11-20 11:05:09,499 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-20 11:05:09,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 421 events. 58/421 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1502 event pairs, 1 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 279. Up to 16 conditions per place. [2022-11-20 11:05:09,521 INFO L119 LiptonReduction]: Number of co-enabled transitions 14784 [2022-11-20 11:05:14,090 INFO L134 LiptonReduction]: Checked pairs total: 36794 [2022-11-20 11:05:14,091 INFO L136 LiptonReduction]: Total number of compositions: 145 [2022-11-20 11:05:14,092 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 64 places, 81 transitions, 192 flow [2022-11-20 11:05:16,368 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 38466 states, 38421 states have (on average 5.138439915671118) internal successors, (197424), 38465 states have internal predecessors, (197424), 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) [2022-11-20 11:05:16,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:05:16,370 INFO L357 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@66a58ab3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:05:16,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-20 11:05:16,496 INFO L276 IsEmpty]: Start isEmpty. Operand has 38466 states, 38421 states have (on average 5.138439915671118) internal successors, (197424), 38465 states have internal predecessors, (197424), 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) [2022-11-20 11:05:16,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:05:16,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:16,497 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:05:16,498 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-20 11:05:16,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:16,498 INFO L85 PathProgramCache]: Analyzing trace with hash 35530, now seen corresponding path program 1 times [2022-11-20 11:05:16,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:16,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880241650] [2022-11-20 11:05:16,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:16,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:16,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:16,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880241650] [2022-11-20 11:05:16,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880241650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:16,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:16,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:05:16,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975830461] [2022-11-20 11:05:16,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:16,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:16,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:16,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:16,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:16,612 INFO L87 Difference]: Start difference. First operand has 38466 states, 38421 states have (on average 5.138439915671118) internal successors, (197424), 38465 states have internal predecessors, (197424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-20 11:05:18,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:18,099 INFO L93 Difference]: Finished difference Result 34384 states and 124320 transitions. [2022-11-20 11:05:18,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:18,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-20 11:05:18,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:18,644 INFO L225 Difference]: With dead ends: 34384 [2022-11-20 11:05:18,645 INFO L226 Difference]: Without dead ends: 32187 [2022-11-20 11:05:18,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:18,662 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:18,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 25 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:05:18,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32187 states. [2022-11-20 11:05:20,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32187 to 32187. [2022-11-20 11:05:20,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32187 states, 32162 states have (on average 3.623717430508053) internal successors, (116546), 32186 states have internal predecessors, (116546), 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) [2022-11-20 11:05:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32187 states to 32187 states and 116546 transitions. [2022-11-20 11:05:20,551 INFO L78 Accepts]: Start accepts. Automaton has 32187 states and 116546 transitions. Word has length 2 [2022-11-20 11:05:20,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:20,551 INFO L495 AbstractCegarLoop]: Abstraction has 32187 states and 116546 transitions. [2022-11-20 11:05:20,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-20 11:05:20,552 INFO L276 IsEmpty]: Start isEmpty. Operand 32187 states and 116546 transitions. [2022-11-20 11:05:20,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:05:20,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:20,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:05:20,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:05:20,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-20 11:05:20,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:20,554 INFO L85 PathProgramCache]: Analyzing trace with hash 35531, now seen corresponding path program 1 times [2022-11-20 11:05:20,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:20,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563445387] [2022-11-20 11:05:20,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:20,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:20,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:20,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563445387] [2022-11-20 11:05:20,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563445387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:20,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:20,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:05:20,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125792301] [2022-11-20 11:05:20,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:20,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:20,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:20,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:20,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:20,636 INFO L87 Difference]: Start difference. First operand 32187 states and 116546 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-20 11:05:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:21,224 INFO L93 Difference]: Finished difference Result 32180 states and 116537 transitions. [2022-11-20 11:05:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:21,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-20 11:05:21,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:21,576 INFO L225 Difference]: With dead ends: 32180 [2022-11-20 11:05:21,576 INFO L226 Difference]: Without dead ends: 32180 [2022-11-20 11:05:21,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:21,578 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:21,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 28 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:05:21,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32180 states. [2022-11-20 11:05:23,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32180 to 32180. [2022-11-20 11:05:23,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32180 states, 32157 states have (on average 3.624000995117704) internal successors, (116537), 32179 states have internal predecessors, (116537), 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) [2022-11-20 11:05:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32180 states to 32180 states and 116537 transitions. [2022-11-20 11:05:23,327 INFO L78 Accepts]: Start accepts. Automaton has 32180 states and 116537 transitions. Word has length 2 [2022-11-20 11:05:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:23,327 INFO L495 AbstractCegarLoop]: Abstraction has 32180 states and 116537 transitions. [2022-11-20 11:05:23,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-20 11:05:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 32180 states and 116537 transitions. [2022-11-20 11:05:23,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:05:23,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:23,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:05:23,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:05:23,331 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-20 11:05:23,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:23,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1519392394, now seen corresponding path program 1 times [2022-11-20 11:05:23,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:23,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205549079] [2022-11-20 11:05:23,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:23,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:23,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:23,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205549079] [2022-11-20 11:05:23,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205549079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:23,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577591490] [2022-11-20 11:05:23,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:23,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:23,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:23,433 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:23,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:05:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:23,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:05:23,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:23,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:05:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:23,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:23,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577591490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:23,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:23,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-20 11:05:23,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601224746] [2022-11-20 11:05:23,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:23,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:05:23,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:23,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:05:23,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:05:23,883 INFO L87 Difference]: Start difference. First operand 32180 states and 116537 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-11-20 11:05:24,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:24,184 INFO L93 Difference]: Finished difference Result 9267 states and 32399 transitions. [2022-11-20 11:05:24,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:05:24,184 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 [2022-11-20 11:05:24,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:24,230 INFO L225 Difference]: With dead ends: 9267 [2022-11-20 11:05:24,230 INFO L226 Difference]: Without dead ends: 9267 [2022-11-20 11:05:24,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:05:24,232 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 299 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:24,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 62 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:05:24,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9267 states. [2022-11-20 11:05:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9267 to 9267. [2022-11-20 11:05:24,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9267 states, 9266 states have (on average 3.496546514137708) internal successors, (32399), 9266 states have internal predecessors, (32399), 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) [2022-11-20 11:05:24,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9267 states to 9267 states and 32399 transitions. [2022-11-20 11:05:24,578 INFO L78 Accepts]: Start accepts. Automaton has 9267 states and 32399 transitions. Word has length 6 [2022-11-20 11:05:24,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:24,578 INFO L495 AbstractCegarLoop]: Abstraction has 9267 states and 32399 transitions. [2022-11-20 11:05:24,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-11-20 11:05:24,578 INFO L276 IsEmpty]: Start isEmpty. Operand 9267 states and 32399 transitions. [2022-11-20 11:05:24,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:05:24,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:24,581 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-20 11:05:24,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 11:05:24,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e5f3b7f-919b-430b-8dd7-fd1ccbe34486/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:24,785 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-20 11:05:24,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:24,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1136726885, now seen corresponding path program 1 times [2022-11-20 11:05:24,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:24,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383622159] [2022-11-20 11:05:24,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:24,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:05:24,804 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:05:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:05:24,824 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:05:24,824 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:05:24,824 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-20 11:05:24,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-20 11:05:24,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-20 11:05:24,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-20 11:05:24,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-20 11:05:24,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-20 11:05:24,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-20 11:05:24,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:05:24,827 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 11:05:24,827 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:05:24,827 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-20 11:05:24,853 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 11:05:24,856 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 11:05:24,857 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 207 transitions, 458 flow [2022-11-20 11:05:24,857 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 207 transitions, 458 flow [2022-11-20 11:05:24,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 207 transitions, 458 flow [2022-11-20 11:05:24,989 INFO L130 PetriNetUnfolder]: 91/659 cut-off events. [2022-11-20 11:05:24,989 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-20 11:05:24,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 714 conditions, 659 events. 91/659 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2746 event pairs, 6 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 441. Up to 32 conditions per place. [2022-11-20 11:05:25,024 INFO L119 LiptonReduction]: Number of co-enabled transitions 23184 [2022-11-20 11:05:29,434 INFO L134 LiptonReduction]: Checked pairs total: 57226 [2022-11-20 11:05:29,435 INFO L136 LiptonReduction]: Total number of compositions: 166 [2022-11-20 11:05:29,435 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 78 places, 100 transitions, 244 flow [2022-11-20 11:05:49,313 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 479202 states, 479122 states have (on average 6.491284057087756) internal successors, (3110117), 479201 states have internal predecessors, (3110117), 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) [2022-11-20 11:05:49,332 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:05:49,333 INFO L357 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@66a58ab3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:05:49,333 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-20 11:05:50,137 INFO L276 IsEmpty]: Start isEmpty. Operand has 479202 states, 479122 states have (on average 6.491284057087756) internal successors, (3110117), 479201 states have internal predecessors, (3110117), 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) [2022-11-20 11:05:50,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:05:50,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:50,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:05:50,138 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-20 11:05:50,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:50,139 INFO L85 PathProgramCache]: Analyzing trace with hash 48428, now seen corresponding path program 1 times [2022-11-20 11:05:50,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:50,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282856371] [2022-11-20 11:05:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:50,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:50,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:50,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282856371] [2022-11-20 11:05:50,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282856371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:50,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:50,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:05:50,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344070532] [2022-11-20 11:05:50,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:50,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:50,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:50,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:50,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:50,932 INFO L87 Difference]: Start difference. First operand has 479202 states, 479122 states have (on average 6.491284057087756) internal successors, (3110117), 479201 states have internal predecessors, (3110117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-20 11:06:03,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:03,184 INFO L93 Difference]: Finished difference Result 428020 states and 1925046 transitions. [2022-11-20 11:06:03,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:06:03,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-20 11:06:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted.