./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8 --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 fd7555e2b4abe63429c1be22a8b482f63bbf931ffcb895a158eac84b789e7c88 --- 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-e04fb08 [2022-11-16 12:46:59,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:46:59,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:46:59,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:46:59,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:46:59,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:46:59,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:46:59,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:46:59,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:46:59,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:46:59,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:46:59,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:46:59,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:46:59,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:46:59,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:46:59,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:46:59,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:46:59,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:46:59,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:46:59,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:46:59,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:46:59,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:46:59,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:46:59,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:46:59,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:46:59,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:46:59,695 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:46:59,696 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:46:59,696 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:46:59,697 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:46:59,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:46:59,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:46:59,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:46:59,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:46:59,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:46:59,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:46:59,702 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:46:59,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:46:59,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:46:59,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:46:59,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:46:59,705 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 12:46:59,726 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:46:59,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:46:59,726 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:46:59,727 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:46:59,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:46:59,728 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:46:59,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:46:59,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:46:59,729 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:46:59,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:46:59,729 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:46:59,729 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:46:59,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:46:59,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:46:59,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:46:59,730 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:46:59,730 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:46:59,731 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:46:59,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:46:59,731 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:46:59,731 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:46:59,732 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:46:59,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:46:59,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:46:59,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:46:59,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:46:59,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:46:59,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:46:59,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:46:59,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:46:59,733 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_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd7555e2b4abe63429c1be22a8b482f63bbf931ffcb895a158eac84b789e7c88 [2022-11-16 12:46:59,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:46:59,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:46:59,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:46:59,996 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:46:59,997 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:46:59,999 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-20.i [2022-11-16 12:47:00,066 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/data/724681a7b/005e92a626874bd09c01ab027214e827/FLAG9bcf57f7b [2022-11-16 12:47:00,579 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:47:00,579 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-20.i [2022-11-16 12:47:00,592 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/data/724681a7b/005e92a626874bd09c01ab027214e827/FLAG9bcf57f7b [2022-11-16 12:47:00,863 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/data/724681a7b/005e92a626874bd09c01ab027214e827 [2022-11-16 12:47:00,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:47:00,870 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:47:00,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:47:00,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:47:00,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:47:00,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:47:00" (1/1) ... [2022-11-16 12:47:00,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@753797de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:00, skipping insertion in model container [2022-11-16 12:47:00,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:47:00" (1/1) ... [2022-11-16 12:47:00,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:47:00,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:47:01,397 WARN L229 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_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-20.i[30190,30203] [2022-11-16 12:47:01,418 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:47:01,426 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:47:01,486 WARN L229 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_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-20.i[30190,30203] [2022-11-16 12:47:01,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:47:01,538 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:47:01,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01 WrapperNode [2022-11-16 12:47:01,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:47:01,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:47:01,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:47:01,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:47:01,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,587 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,618 INFO L138 Inliner]: procedures = 163, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 71 [2022-11-16 12:47:01,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:47:01,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:47:01,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:47:01,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:47:01,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,666 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:47:01,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:47:01,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:47:01,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:47:01,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:47:01,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:01,715 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:47:01,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:47:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:47:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2022-11-16 12:47:01,763 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2022-11-16 12:47:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:47:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:47:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:47:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:47:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:47:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2022-11-16 12:47:01,764 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2022-11-16 12:47:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:47:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:47:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:47:01,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:47:01,766 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:47:01,967 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:47:01,969 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:47:02,248 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:47:02,256 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:47:02,256 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 12:47:02,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:47:02 BoogieIcfgContainer [2022-11-16 12:47:02,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:47:02,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:47:02,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:47:02,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:47:02,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:47:00" (1/3) ... [2022-11-16 12:47:02,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2e20b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:47:02, skipping insertion in model container [2022-11-16 12:47:02,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (2/3) ... [2022-11-16 12:47:02,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2e20b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:47:02, skipping insertion in model container [2022-11-16 12:47:02,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:47:02" (3/3) ... [2022-11-16 12:47:02,279 INFO L112 eAbstractionObserver]: Analyzing ICFG reorder_c11_bad-20.i [2022-11-16 12:47:02,299 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:47:02,299 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-16 12:47:02,299 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:47:02,391 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 12:47:02,453 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:47:02,468 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 103 transitions, 228 flow [2022-11-16 12:47:02,470 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 103 transitions, 228 flow [2022-11-16 12:47:02,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 103 transitions, 228 flow [2022-11-16 12:47:02,588 INFO L130 PetriNetUnfolder]: 24/243 cut-off events. [2022-11-16 12:47:02,588 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-16 12:47:02,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 243 events. 24/243 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 890 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 126. Up to 8 conditions per place. [2022-11-16 12:47:02,609 INFO L119 LiptonReduction]: Number of co-enabled transitions 1488 [2022-11-16 12:47:06,233 INFO L134 LiptonReduction]: Checked pairs total: 2714 [2022-11-16 12:47:06,233 INFO L136 LiptonReduction]: Total number of compositions: 89 [2022-11-16 12:47:06,241 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 36 transitions, 94 flow [2022-11-16 12:47:06,275 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 298 states, 238 states have (on average 2.4495798319327733) internal successors, (583), 297 states have internal predecessors, (583), 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) [2022-11-16 12:47:06,294 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:47:06,301 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;@428d48e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:47:06,301 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-11-16 12:47:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand has 298 states, 238 states have (on average 2.4495798319327733) internal successors, (583), 297 states have internal predecessors, (583), 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) [2022-11-16 12:47:06,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:47:06,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:06,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:47:06,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 12:47:06,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:06,317 INFO L85 PathProgramCache]: Analyzing trace with hash 12138, now seen corresponding path program 1 times [2022-11-16 12:47:06,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:06,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397945585] [2022-11-16 12:47:06,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:06,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:06,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:06,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397945585] [2022-11-16 12:47:06,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397945585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:06,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:06,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:47:06,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208654192] [2022-11-16 12:47:06,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:06,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:47:06,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:06,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:47:06,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:47:06,764 INFO L87 Difference]: Start difference. First operand has 298 states, 238 states have (on average 2.4495798319327733) internal successors, (583), 297 states have internal predecessors, (583), 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) [2022-11-16 12:47:06,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:06,902 INFO L93 Difference]: Finished difference Result 275 states and 546 transitions. [2022-11-16 12:47:06,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:47:06,905 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 [2022-11-16 12:47:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:06,927 INFO L225 Difference]: With dead ends: 275 [2022-11-16 12:47:06,928 INFO L226 Difference]: Without dead ends: 266 [2022-11-16 12:47:06,929 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 [2022-11-16 12:47:06,935 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:06,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:47:06,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-16 12:47:06,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2022-11-16 12:47:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 220 states have (on average 2.4045454545454548) internal successors, (529), 265 states have internal predecessors, (529), 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) [2022-11-16 12:47:07,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 529 transitions. [2022-11-16 12:47:07,002 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 529 transitions. Word has length 2 [2022-11-16 12:47:07,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:07,003 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 529 transitions. [2022-11-16 12:47:07,003 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) [2022-11-16 12:47:07,003 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 529 transitions. [2022-11-16 12:47:07,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:47:07,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:07,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:47:07,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:47:07,005 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 12:47:07,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:07,006 INFO L85 PathProgramCache]: Analyzing trace with hash 12139, now seen corresponding path program 1 times [2022-11-16 12:47:07,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:07,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462357735] [2022-11-16 12:47:07,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:07,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:07,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:07,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462357735] [2022-11-16 12:47:07,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462357735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:07,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:07,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:47:07,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757365038] [2022-11-16 12:47:07,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:07,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:47:07,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:07,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:47:07,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:47:07,103 INFO L87 Difference]: Start difference. First operand 266 states and 529 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) [2022-11-16 12:47:07,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:07,172 INFO L93 Difference]: Finished difference Result 246 states and 491 transitions. [2022-11-16 12:47:07,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:47:07,174 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 [2022-11-16 12:47:07,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:07,176 INFO L225 Difference]: With dead ends: 246 [2022-11-16 12:47:07,176 INFO L226 Difference]: Without dead ends: 246 [2022-11-16 12:47:07,177 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 [2022-11-16 12:47:07,178 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:07,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 4 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:47:07,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-16 12:47:07,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2022-11-16 12:47:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 208 states have (on average 2.360576923076923) internal successors, (491), 245 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) [2022-11-16 12:47:07,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 491 transitions. [2022-11-16 12:47:07,194 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 491 transitions. Word has length 2 [2022-11-16 12:47:07,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:07,195 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 491 transitions. [2022-11-16 12:47:07,195 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) [2022-11-16 12:47:07,195 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 491 transitions. [2022-11-16 12:47:07,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:47:07,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:07,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:47:07,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:47:07,197 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 12:47:07,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:07,197 INFO L85 PathProgramCache]: Analyzing trace with hash 361829227, now seen corresponding path program 1 times [2022-11-16 12:47:07,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:07,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349623859] [2022-11-16 12:47:07,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:07,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:07,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:07,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349623859] [2022-11-16 12:47:07,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349623859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:47:07,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224505341] [2022-11-16 12:47:07,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:07,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:07,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:07,338 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:07,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:47:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:07,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:47:07,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:07,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:07,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 12:47:07,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:47:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:07,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:07,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224505341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:47:07,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:47:07,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-16 12:47:07,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289335980] [2022-11-16 12:47:07,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:07,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:47:07,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:07,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:47:07,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:47:07,667 INFO L87 Difference]: Start difference. First operand 246 states and 491 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:07,699 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2022-11-16 12:47:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:47:07,700 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 12:47:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:07,701 INFO L225 Difference]: With dead ends: 15 [2022-11-16 12:47:07,701 INFO L226 Difference]: Without dead ends: 15 [2022-11-16 12:47:07,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:47:07,702 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 19 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:07,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 2 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:47:07,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-16 12:47:07,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-16 12:47:07,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 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) [2022-11-16 12:47:07,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2022-11-16 12:47:07,708 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 5 [2022-11-16 12:47:07,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:07,709 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2022-11-16 12:47:07,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:07,709 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2022-11-16 12:47:07,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:47:07,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:07,710 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-16 12:47:07,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:07,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:07,919 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 12:47:07,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:07,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1668195628, now seen corresponding path program 1 times [2022-11-16 12:47:07,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:07,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624740462] [2022-11-16 12:47:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:07,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:47:07,942 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:47:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:47:07,969 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:47:07,969 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:47:07,971 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2022-11-16 12:47:07,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (11 of 13 remaining) [2022-11-16 12:47:07,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2022-11-16 12:47:07,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2022-11-16 12:47:07,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2022-11-16 12:47:07,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2022-11-16 12:47:07,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2022-11-16 12:47:07,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2022-11-16 12:47:07,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2022-11-16 12:47:07,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 13 remaining) [2022-11-16 12:47:07,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (2 of 13 remaining) [2022-11-16 12:47:07,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 13 remaining) [2022-11-16 12:47:07,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2022-11-16 12:47:07,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:47:07,980 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 12:47:07,982 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:47:07,983 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-16 12:47:08,016 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-16 12:47:08,019 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:47:08,019 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 122 transitions, 292 flow [2022-11-16 12:47:08,020 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 122 transitions, 292 flow [2022-11-16 12:47:08,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 122 transitions, 292 flow [2022-11-16 12:47:08,223 INFO L130 PetriNetUnfolder]: 107/793 cut-off events. [2022-11-16 12:47:08,223 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-16 12:47:08,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 793 events. 107/793 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4292 event pairs, 2 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 468. Up to 32 conditions per place. [2022-11-16 12:47:08,239 INFO L119 LiptonReduction]: Number of co-enabled transitions 3568 [2022-11-16 12:47:11,556 INFO L134 LiptonReduction]: Checked pairs total: 7587 [2022-11-16 12:47:11,557 INFO L136 LiptonReduction]: Total number of compositions: 97 [2022-11-16 12:47:11,558 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 48 transitions, 144 flow [2022-11-16 12:47:11,773 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4450 states, 4166 states have (on average 3.2645223235717715) internal successors, (13600), 4449 states have internal predecessors, (13600), 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) [2022-11-16 12:47:11,776 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:47:11,778 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;@428d48e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:47:11,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-11-16 12:47:11,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 4450 states, 4166 states have (on average 3.2645223235717715) internal successors, (13600), 4449 states have internal predecessors, (13600), 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) [2022-11-16 12:47:11,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:47:11,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:11,795 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:47:11,796 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-16 12:47:11,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:11,797 INFO L85 PathProgramCache]: Analyzing trace with hash 19703, now seen corresponding path program 1 times [2022-11-16 12:47:11,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:11,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562482410] [2022-11-16 12:47:11,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:11,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:11,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:11,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562482410] [2022-11-16 12:47:11,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562482410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:11,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:11,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:47:11,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685747189] [2022-11-16 12:47:11,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:11,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:47:11,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:11,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:47:11,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:47:11,902 INFO L87 Difference]: Start difference. First operand has 4450 states, 4166 states have (on average 3.2645223235717715) internal successors, (13600), 4449 states have internal predecessors, (13600), 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) [2022-11-16 12:47:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:12,057 INFO L93 Difference]: Finished difference Result 4181 states and 12805 transitions. [2022-11-16 12:47:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:47:12,058 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 [2022-11-16 12:47:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:12,092 INFO L225 Difference]: With dead ends: 4181 [2022-11-16 12:47:12,092 INFO L226 Difference]: Without dead ends: 4116 [2022-11-16 12:47:12,094 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 [2022-11-16 12:47:12,097 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 6 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 [2022-11-16 12:47:12,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 6 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:47:12,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4116 states. [2022-11-16 12:47:12,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4116 to 4116. [2022-11-16 12:47:12,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4116 states, 3888 states have (on average 3.243827160493827) internal successors, (12612), 4115 states have internal predecessors, (12612), 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) [2022-11-16 12:47:12,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 12612 transitions. [2022-11-16 12:47:12,303 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 12612 transitions. Word has length 2 [2022-11-16 12:47:12,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:12,304 INFO L495 AbstractCegarLoop]: Abstraction has 4116 states and 12612 transitions. [2022-11-16 12:47:12,304 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) [2022-11-16 12:47:12,305 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 12612 transitions. [2022-11-16 12:47:12,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:47:12,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:12,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:47:12,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:47:12,306 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-16 12:47:12,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:12,307 INFO L85 PathProgramCache]: Analyzing trace with hash 19704, now seen corresponding path program 1 times [2022-11-16 12:47:12,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:12,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052363375] [2022-11-16 12:47:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:12,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:12,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:12,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052363375] [2022-11-16 12:47:12,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052363375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:12,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:12,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:47:12,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090638977] [2022-11-16 12:47:12,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:12,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:47:12,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:12,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:47:12,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:47:12,455 INFO L87 Difference]: Start difference. First operand 4116 states and 12612 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) [2022-11-16 12:47:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:12,596 INFO L93 Difference]: Finished difference Result 4030 states and 12425 transitions. [2022-11-16 12:47:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:47:12,597 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 [2022-11-16 12:47:12,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:12,630 INFO L225 Difference]: With dead ends: 4030 [2022-11-16 12:47:12,631 INFO L226 Difference]: Without dead ends: 4030 [2022-11-16 12:47:12,631 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 [2022-11-16 12:47:12,631 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:12,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:47:12,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4030 states. [2022-11-16 12:47:12,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4030 to 4030. [2022-11-16 12:47:12,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4030 states, 3821 states have (on average 3.2517665532583093) internal successors, (12425), 4029 states have internal predecessors, (12425), 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) [2022-11-16 12:47:12,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4030 states to 4030 states and 12425 transitions. [2022-11-16 12:47:12,837 INFO L78 Accepts]: Start accepts. Automaton has 4030 states and 12425 transitions. Word has length 2 [2022-11-16 12:47:12,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:12,837 INFO L495 AbstractCegarLoop]: Abstraction has 4030 states and 12425 transitions. [2022-11-16 12:47:12,837 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) [2022-11-16 12:47:12,837 INFO L276 IsEmpty]: Start isEmpty. Operand 4030 states and 12425 transitions. [2022-11-16 12:47:12,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:47:12,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:12,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:47:12,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:47:12,838 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-16 12:47:12,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:12,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1029969640, now seen corresponding path program 1 times [2022-11-16 12:47:12,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:12,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015141933] [2022-11-16 12:47:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:12,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:13,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:13,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015141933] [2022-11-16 12:47:13,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015141933] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:47:13,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489126490] [2022-11-16 12:47:13,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:13,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:13,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:13,003 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:13,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:47:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:13,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:47:13,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:13,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:13,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 12:47:13,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:47:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:13,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:13,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489126490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:47:13,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:47:13,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-16 12:47:13,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984194324] [2022-11-16 12:47:13,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:13,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:47:13,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:13,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:47:13,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:47:13,240 INFO L87 Difference]: Start difference. First operand 4030 states and 12425 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) [2022-11-16 12:47:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:13,506 INFO L93 Difference]: Finished difference Result 3763 states and 11671 transitions. [2022-11-16 12:47:13,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:47:13,508 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 [2022-11-16 12:47:13,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:13,531 INFO L225 Difference]: With dead ends: 3763 [2022-11-16 12:47:13,532 INFO L226 Difference]: Without dead ends: 3763 [2022-11-16 12:47:13,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:47:13,534 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 52 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:13,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 23 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:47:13,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3763 states. [2022-11-16 12:47:13,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3763 to 3763. [2022-11-16 12:47:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3574 states have (on average 3.26552881925014) internal successors, (11671), 3762 states have internal predecessors, (11671), 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) [2022-11-16 12:47:13,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 11671 transitions. [2022-11-16 12:47:13,657 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 11671 transitions. Word has length 6 [2022-11-16 12:47:13,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:13,657 INFO L495 AbstractCegarLoop]: Abstraction has 3763 states and 11671 transitions. [2022-11-16 12:47:13,657 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) [2022-11-16 12:47:13,658 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 11671 transitions. [2022-11-16 12:47:13,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:47:13,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:13,659 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2022-11-16 12:47:13,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 12:47:13,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:13,866 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-16 12:47:13,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:13,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1354119392, now seen corresponding path program 1 times [2022-11-16 12:47:13,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:13,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618969537] [2022-11-16 12:47:13,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:13,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:47:13,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:13,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618969537] [2022-11-16 12:47:13,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618969537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:13,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:13,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:47:13,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560089119] [2022-11-16 12:47:13,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:13,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:47:13,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:13,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:47:13,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:47:13,956 INFO L87 Difference]: Start difference. First operand 3763 states and 11671 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:14,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:14,045 INFO L93 Difference]: Finished difference Result 3390 states and 10504 transitions. [2022-11-16 12:47:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:47:14,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:47:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:14,067 INFO L225 Difference]: With dead ends: 3390 [2022-11-16 12:47:14,067 INFO L226 Difference]: Without dead ends: 3390 [2022-11-16 12:47:14,068 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 [2022-11-16 12:47:14,068 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:14,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 6 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:47:14,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3390 states. [2022-11-16 12:47:14,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3390 to 3390. [2022-11-16 12:47:14,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3390 states, 3244 states have (on average 3.2379778051787915) internal successors, (10504), 3389 states have internal predecessors, (10504), 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) [2022-11-16 12:47:14,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3390 states to 3390 states and 10504 transitions. [2022-11-16 12:47:14,223 INFO L78 Accepts]: Start accepts. Automaton has 3390 states and 10504 transitions. Word has length 11 [2022-11-16 12:47:14,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:14,224 INFO L495 AbstractCegarLoop]: Abstraction has 3390 states and 10504 transitions. [2022-11-16 12:47:14,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:14,225 INFO L276 IsEmpty]: Start isEmpty. Operand 3390 states and 10504 transitions. [2022-11-16 12:47:14,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:47:14,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:14,227 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2022-11-16 12:47:14,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:47:14,227 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-16 12:47:14,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:14,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1354119391, now seen corresponding path program 1 times [2022-11-16 12:47:14,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:14,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152390240] [2022-11-16 12:47:14,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:14,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:14,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:14,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152390240] [2022-11-16 12:47:14,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152390240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:47:14,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275310936] [2022-11-16 12:47:14,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:14,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:14,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:14,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:14,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:47:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:47:14,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:14,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:14,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275310936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:47:14,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:47:14,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-16 12:47:14,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325802541] [2022-11-16 12:47:14,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:14,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:47:14,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:14,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:47:14,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:47:14,481 INFO L87 Difference]: Start difference. First operand 3390 states and 10504 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:14,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:14,517 INFO L93 Difference]: Finished difference Result 60 states and 119 transitions. [2022-11-16 12:47:14,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:47:14,518 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:47:14,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:14,519 INFO L225 Difference]: With dead ends: 60 [2022-11-16 12:47:14,519 INFO L226 Difference]: Without dead ends: 60 [2022-11-16 12:47:14,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:47:14,520 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:14,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 6 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:47:14,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-16 12:47:14,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-16 12:47:14,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 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) [2022-11-16 12:47:14,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2022-11-16 12:47:14,524 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 11 [2022-11-16 12:47:14,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:14,524 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2022-11-16 12:47:14,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:14,525 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2022-11-16 12:47:14,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:47:14,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:14,526 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-16 12:47:14,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:14,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 12:47:14,732 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-16 12:47:14,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:14,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1354118329, now seen corresponding path program 1 times [2022-11-16 12:47:14,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:14,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118535295] [2022-11-16 12:47:14,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:14,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:47:14,749 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:47:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:47:14,762 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:47:14,763 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:47:14,763 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 14 remaining) [2022-11-16 12:47:14,763 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (12 of 14 remaining) [2022-11-16 12:47:14,763 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2022-11-16 12:47:14,764 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2022-11-16 12:47:14,764 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2022-11-16 12:47:14,764 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2022-11-16 12:47:14,764 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2022-11-16 12:47:14,764 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 14 remaining) [2022-11-16 12:47:14,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2022-11-16 12:47:14,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2022-11-16 12:47:14,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (3 of 14 remaining) [2022-11-16 12:47:14,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 14 remaining) [2022-11-16 12:47:14,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 14 remaining) [2022-11-16 12:47:14,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2022-11-16 12:47:14,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:47:14,766 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-16 12:47:14,766 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:47:14,767 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-16 12:47:14,797 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2022-11-16 12:47:14,800 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:47:14,800 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 141 transitions, 360 flow [2022-11-16 12:47:14,800 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 141 transitions, 360 flow [2022-11-16 12:47:14,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 141 transitions, 360 flow [2022-11-16 12:47:15,251 INFO L130 PetriNetUnfolder]: 496/2769 cut-off events. [2022-11-16 12:47:15,251 INFO L131 PetriNetUnfolder]: For 419/419 co-relation queries the response was YES. [2022-11-16 12:47:15,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3220 conditions, 2769 events. 496/2769 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 20313 event pairs, 64 based on Foata normal form. 0/2089 useless extension candidates. Maximal degree in co-relation 1654. Up to 192 conditions per place. [2022-11-16 12:47:15,311 INFO L119 LiptonReduction]: Number of co-enabled transitions 6240 [2022-11-16 12:47:19,235 INFO L134 LiptonReduction]: Checked pairs total: 14710 [2022-11-16 12:47:19,236 INFO L136 LiptonReduction]: Total number of compositions: 112 [2022-11-16 12:47:19,237 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 58 transitions, 194 flow [2022-11-16 12:47:21,893 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 65293 states, 63821 states have (on average 4.251703984581877) internal successors, (271348), 65292 states have internal predecessors, (271348), 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) [2022-11-16 12:47:21,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:47:21,897 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;@428d48e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:47:21,897 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-11-16 12:47:22,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 65293 states, 63821 states have (on average 4.251703984581877) internal successors, (271348), 65292 states have internal predecessors, (271348), 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) [2022-11-16 12:47:22,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:47:22,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:22,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:47:22,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:47:22,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:22,017 INFO L85 PathProgramCache]: Analyzing trace with hash 28341, now seen corresponding path program 1 times [2022-11-16 12:47:22,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:22,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891757109] [2022-11-16 12:47:22,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:22,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:22,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:22,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891757109] [2022-11-16 12:47:22,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891757109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:22,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:22,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:47:22,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271097201] [2022-11-16 12:47:22,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:22,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:47:22,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:22,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:47:22,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:47:22,420 INFO L87 Difference]: Start difference. First operand has 65293 states, 63821 states have (on average 4.251703984581877) internal successors, (271348), 65292 states have internal predecessors, (271348), 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) [2022-11-16 12:47:23,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:23,989 INFO L93 Difference]: Finished difference Result 61157 states and 254856 transitions. [2022-11-16 12:47:23,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:47:23,999 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 [2022-11-16 12:47:23,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:24,962 INFO L225 Difference]: With dead ends: 61157 [2022-11-16 12:47:24,965 INFO L226 Difference]: Without dead ends: 60644 [2022-11-16 12:47:24,965 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 [2022-11-16 12:47:24,967 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 53 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:24,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 6 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:47:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60644 states. [2022-11-16 12:47:27,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60644 to 60644. [2022-11-16 12:47:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60644 states, 59457 states have (on average 4.251929966194056) internal successors, (252807), 60643 states have internal predecessors, (252807), 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) [2022-11-16 12:47:29,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60644 states to 60644 states and 252807 transitions. [2022-11-16 12:47:29,052 INFO L78 Accepts]: Start accepts. Automaton has 60644 states and 252807 transitions. Word has length 2 [2022-11-16 12:47:29,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:29,053 INFO L495 AbstractCegarLoop]: Abstraction has 60644 states and 252807 transitions. [2022-11-16 12:47:29,053 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) [2022-11-16 12:47:29,053 INFO L276 IsEmpty]: Start isEmpty. Operand 60644 states and 252807 transitions. [2022-11-16 12:47:29,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:47:29,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:29,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:47:29,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:47:29,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:47:29,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:29,055 INFO L85 PathProgramCache]: Analyzing trace with hash 28342, now seen corresponding path program 1 times [2022-11-16 12:47:29,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:29,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671526664] [2022-11-16 12:47:29,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:29,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:29,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:29,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671526664] [2022-11-16 12:47:29,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671526664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:29,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:29,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:47:29,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739148405] [2022-11-16 12:47:29,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:29,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:47:29,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:29,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:47:29,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:47:29,128 INFO L87 Difference]: Start difference. First operand 60644 states and 252807 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) [2022-11-16 12:47:30,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:30,345 INFO L93 Difference]: Finished difference Result 60378 states and 252065 transitions. [2022-11-16 12:47:30,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:47:30,346 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 [2022-11-16 12:47:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:30,918 INFO L225 Difference]: With dead ends: 60378 [2022-11-16 12:47:30,918 INFO L226 Difference]: Without dead ends: 60378 [2022-11-16 12:47:30,919 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 [2022-11-16 12:47:30,920 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:30,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:47:31,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60378 states. [2022-11-16 12:47:33,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60378 to 60378. [2022-11-16 12:47:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60378 states, 59230 states have (on average 4.255698125949688) internal successors, (252065), 60377 states have internal predecessors, (252065), 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) [2022-11-16 12:47:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60378 states to 60378 states and 252065 transitions. [2022-11-16 12:47:33,586 INFO L78 Accepts]: Start accepts. Automaton has 60378 states and 252065 transitions. Word has length 2 [2022-11-16 12:47:33,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:33,586 INFO L495 AbstractCegarLoop]: Abstraction has 60378 states and 252065 transitions. [2022-11-16 12:47:33,586 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) [2022-11-16 12:47:33,586 INFO L276 IsEmpty]: Start isEmpty. Operand 60378 states and 252065 transitions. [2022-11-16 12:47:33,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:47:33,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:33,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:47:33,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:47:33,587 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:47:33,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:33,587 INFO L85 PathProgramCache]: Analyzing trace with hash 425062777, now seen corresponding path program 1 times [2022-11-16 12:47:33,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:33,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504417764] [2022-11-16 12:47:33,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:33,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:33,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:33,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504417764] [2022-11-16 12:47:33,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504417764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:47:33,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751546151] [2022-11-16 12:47:33,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:33,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:33,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:33,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:33,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:47:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:33,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:47:33,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:33,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:33,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 12:47:33,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:47:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:33,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:33,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751546151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:47:33,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:47:33,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-16 12:47:33,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304470037] [2022-11-16 12:47:33,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:33,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:47:33,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:33,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:47:33,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:47:33,969 INFO L87 Difference]: Start difference. First operand 60378 states and 252065 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) [2022-11-16 12:47:35,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:35,262 INFO L93 Difference]: Finished difference Result 59544 states and 249205 transitions. [2022-11-16 12:47:35,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:47:35,263 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 [2022-11-16 12:47:35,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:35,595 INFO L225 Difference]: With dead ends: 59544 [2022-11-16 12:47:35,595 INFO L226 Difference]: Without dead ends: 59544 [2022-11-16 12:47:35,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:47:35,596 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 63 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:35,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 27 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:47:35,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59544 states. [2022-11-16 12:47:37,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59544 to 59544. [2022-11-16 12:47:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59544 states, 58437 states have (on average 4.264507075996372) internal successors, (249205), 59543 states have internal predecessors, (249205), 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) [2022-11-16 12:47:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59544 states to 59544 states and 249205 transitions. [2022-11-16 12:47:38,007 INFO L78 Accepts]: Start accepts. Automaton has 59544 states and 249205 transitions. Word has length 6 [2022-11-16 12:47:38,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:38,007 INFO L495 AbstractCegarLoop]: Abstraction has 59544 states and 249205 transitions. [2022-11-16 12:47:38,008 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) [2022-11-16 12:47:38,008 INFO L276 IsEmpty]: Start isEmpty. Operand 59544 states and 249205 transitions. [2022-11-16 12:47:38,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:47:38,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:38,008 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2022-11-16 12:47:38,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:38,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:38,209 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:47:38,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:38,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1476193810, now seen corresponding path program 1 times [2022-11-16 12:47:38,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:38,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938813988] [2022-11-16 12:47:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:38,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:38,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:38,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938813988] [2022-11-16 12:47:38,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938813988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:47:38,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728699679] [2022-11-16 12:47:38,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:38,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:38,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:38,291 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:38,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:47:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:38,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:47:38,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:38,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:38,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728699679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:47:38,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:47:38,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-16 12:47:38,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039924877] [2022-11-16 12:47:38,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:38,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:47:38,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:38,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:47:38,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:47:38,440 INFO L87 Difference]: Start difference. First operand 59544 states and 249205 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:38,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:38,483 INFO L93 Difference]: Finished difference Result 186 states and 485 transitions. [2022-11-16 12:47:38,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:47:38,484 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:47:38,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:38,484 INFO L225 Difference]: With dead ends: 186 [2022-11-16 12:47:38,484 INFO L226 Difference]: Without dead ends: 186 [2022-11-16 12:47:38,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:47:38,485 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 69 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:38,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 6 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:47:38,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-16 12:47:38,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-11-16 12:47:38,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.6216216216216215) internal successors, (485), 185 states have internal predecessors, (485), 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) [2022-11-16 12:47:38,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 485 transitions. [2022-11-16 12:47:38,490 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 485 transitions. Word has length 11 [2022-11-16 12:47:38,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:38,490 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 485 transitions. [2022-11-16 12:47:38,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:38,490 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 485 transitions. [2022-11-16 12:47:38,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:47:38,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:38,495 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-16 12:47:38,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:38,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f0463cd-9f50-4c14-928c-3a7c5ceb41cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:38,706 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:47:38,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:38,706 INFO L85 PathProgramCache]: Analyzing trace with hash 839091707, now seen corresponding path program 1 times [2022-11-16 12:47:38,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:38,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5707214] [2022-11-16 12:47:38,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:38,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:47:38,734 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:47:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:47:38,757 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:47:38,758 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:47:38,758 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 15 remaining) [2022-11-16 12:47:38,759 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (13 of 15 remaining) [2022-11-16 12:47:38,759 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 15 remaining) [2022-11-16 12:47:38,760 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2022-11-16 12:47:38,760 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2022-11-16 12:47:38,760 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2022-11-16 12:47:38,760 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2022-11-16 12:47:38,760 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2022-11-16 12:47:38,760 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2022-11-16 12:47:38,761 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2022-11-16 12:47:38,761 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (4 of 15 remaining) [2022-11-16 12:47:38,761 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 15 remaining) [2022-11-16 12:47:38,761 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 15 remaining) [2022-11-16 12:47:38,761 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 15 remaining) [2022-11-16 12:47:38,762 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2022-11-16 12:47:38,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:47:38,763 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 12:47:38,763 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:47:38,763 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-16 12:47:38,796 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2022-11-16 12:47:38,801 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:47:38,801 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 160 transitions, 432 flow [2022-11-16 12:47:38,802 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 160 transitions, 432 flow [2022-11-16 12:47:38,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 160 transitions, 432 flow [2022-11-16 12:47:41,389 INFO L130 PetriNetUnfolder]: 2379/10599 cut-off events. [2022-11-16 12:47:41,390 INFO L131 PetriNetUnfolder]: For 2144/2144 co-relation queries the response was YES. [2022-11-16 12:47:41,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12764 conditions, 10599 events. 2379/10599 cut-off events. For 2144/2144 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 101096 event pairs, 626 based on Foata normal form. 0/8135 useless extension candidates. Maximal degree in co-relation 6333. Up to 1024 conditions per place. [2022-11-16 12:47:41,673 INFO L119 LiptonReduction]: Number of co-enabled transitions 9504 [2022-11-16 12:47:45,420 INFO L134 LiptonReduction]: Checked pairs total: 22193 [2022-11-16 12:47:45,420 INFO L136 LiptonReduction]: Total number of compositions: 125 [2022-11-16 12:47:45,421 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 69 places, 68 transitions, 248 flow