./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R --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 5b90ecb07ae966182b79ce4444e238e18068c02297f514a326dfeeed6dbb5499 --- 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-38b53e6 [2022-11-25 18:09:01,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:09:01,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:09:01,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:09:01,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:09:01,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:09:01,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:09:01,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:09:01,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:09:01,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:09:01,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:09:01,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:09:01,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:09:01,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:09:01,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:09:01,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:09:01,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:09:01,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:09:01,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:09:01,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:09:01,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:09:01,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:09:01,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:09:01,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:09:01,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:09:01,958 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:09:01,959 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:09:01,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:09:01,960 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:09:01,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:09:01,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:09:01,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:09:01,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:09:01,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:09:01,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:09:01,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:09:01,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:09:01,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:09:01,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:09:01,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:09:01,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:09:01,972 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:09:02,010 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:09:02,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:09:02,012 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:09:02,012 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:09:02,013 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:09:02,013 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:09:02,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:09:02,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:09:02,015 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:09:02,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:09:02,016 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:09:02,016 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:09:02,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:09:02,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:09:02,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:09:02,017 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:09:02,017 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:09:02,017 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:09:02,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:09:02,018 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:09:02,018 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:09:02,018 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:09:02,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:09:02,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:09:02,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:09:02,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:09:02,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:09:02,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:09:02,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:09:02,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:09:02,021 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:09:02,021 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:09:02,021 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:09:02,022 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b90ecb07ae966182b79ce4444e238e18068c02297f514a326dfeeed6dbb5499 [2022-11-25 18:09:02,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:09:02,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:09:02,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:09:02,427 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:09:02,428 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:09:02,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i [2022-11-25 18:09:05,347 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:09:05,640 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:09:05,641 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i [2022-11-25 18:09:05,666 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/data/c46dabc0c/ecc1729d21a94586963af15b2c67788b/FLAG182f63913 [2022-11-25 18:09:05,681 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/data/c46dabc0c/ecc1729d21a94586963af15b2c67788b [2022-11-25 18:09:05,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:09:05,685 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:09:05,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:09:05,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:09:05,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:09:05,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:09:05" (1/1) ... [2022-11-25 18:09:05,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17253051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:05, skipping insertion in model container [2022-11-25 18:09:05,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:09:05" (1/1) ... [2022-11-25 18:09:05,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:09:05,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:09:06,249 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i[41323,41336] [2022-11-25 18:09:06,277 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:09:06,293 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:09:06,346 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i[41323,41336] [2022-11-25 18:09:06,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:09:06,436 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:09:06,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:06 WrapperNode [2022-11-25 18:09:06,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:09:06,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:09:06,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:09:06,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:09:06,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:06" (1/1) ... [2022-11-25 18:09:06,476 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:06" (1/1) ... [2022-11-25 18:09:06,524 INFO L138 Inliner]: procedures = 273, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2022-11-25 18:09:06,525 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:09:06,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:09:06,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:09:06,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:09:06,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:06" (1/1) ... [2022-11-25 18:09:06,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:06" (1/1) ... [2022-11-25 18:09:06,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:06" (1/1) ... [2022-11-25 18:09:06,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:06" (1/1) ... [2022-11-25 18:09:06,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:06" (1/1) ... [2022-11-25 18:09:06,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:06" (1/1) ... [2022-11-25 18:09:06,579 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:06" (1/1) ... [2022-11-25 18:09:06,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:06" (1/1) ... [2022-11-25 18:09:06,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:09:06,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:09:06,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:09:06,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:09:06,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:06" (1/1) ... [2022-11-25 18:09:06,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:09:06,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:09:06,638 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:09:06,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:09:06,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:09:06,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:09:06,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:09:06,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:09:06,694 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 18:09:06,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:09:06,695 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 18:09:06,695 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 18:09:06,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:09:06,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:09:06,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:09:06,698 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:09:06,877 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:09:06,879 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:09:07,158 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:09:07,166 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:09:07,166 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-25 18:09:07,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:09:07 BoogieIcfgContainer [2022-11-25 18:09:07,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:09:07,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:09:07,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:09:07,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:09:07,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:09:05" (1/3) ... [2022-11-25 18:09:07,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@261a2646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:09:07, skipping insertion in model container [2022-11-25 18:09:07,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:06" (2/3) ... [2022-11-25 18:09:07,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@261a2646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:09:07, skipping insertion in model container [2022-11-25 18:09:07,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:09:07" (3/3) ... [2022-11-25 18:09:07,187 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_28-funptr_racefree.i [2022-11-25 18:09:07,215 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:09:07,215 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-25 18:09:07,215 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:09:07,339 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-25 18:09:07,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 136 transitions, 280 flow [2022-11-25 18:09:07,520 INFO L130 PetriNetUnfolder]: 17/183 cut-off events. [2022-11-25 18:09:07,520 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-11-25 18:09:07,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 183 events. 17/183 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 469 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 91. Up to 4 conditions per place. [2022-11-25 18:09:07,527 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 136 transitions, 280 flow [2022-11-25 18:09:07,535 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 136 transitions, 280 flow [2022-11-25 18:09:07,539 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:09:07,566 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 136 transitions, 280 flow [2022-11-25 18:09:07,580 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 136 transitions, 280 flow [2022-11-25 18:09:07,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 136 transitions, 280 flow [2022-11-25 18:09:07,649 INFO L130 PetriNetUnfolder]: 17/183 cut-off events. [2022-11-25 18:09:07,650 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-11-25 18:09:07,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 183 events. 17/183 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 469 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 91. Up to 4 conditions per place. [2022-11-25 18:09:07,657 INFO L119 LiptonReduction]: Number of co-enabled transitions 4134 [2022-11-25 18:09:12,258 INFO L134 LiptonReduction]: Checked pairs total: 7259 [2022-11-25 18:09:12,259 INFO L136 LiptonReduction]: Total number of compositions: 119 [2022-11-25 18:09:12,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:09:12,282 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=PETRI_NET, 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;@dd892c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:09:12,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 18:09:12,285 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-11-25 18:09:12,285 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:09:12,285 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:12,286 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:09:12,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:09:12,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:12,292 INFO L85 PathProgramCache]: Analyzing trace with hash 16481, now seen corresponding path program 1 times [2022-11-25 18:09:12,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:12,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420628990] [2022-11-25 18:09:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:12,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:09:12,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:12,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420628990] [2022-11-25 18:09:12,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420628990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:12,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:12,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:09:12,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295559878] [2022-11-25 18:09:12,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:12,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:09:12,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:12,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:09:12,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:09:12,720 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 255 [2022-11-25 18:09:12,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 44 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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) [2022-11-25 18:09:12,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:12,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 255 [2022-11-25 18:09:12,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:12,868 INFO L130 PetriNetUnfolder]: 166/387 cut-off events. [2022-11-25 18:09:12,868 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:09:12,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 387 events. 166/387 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1558 event pairs, 143 based on Foata normal form. 16/324 useless extension candidates. Maximal degree in co-relation 723. Up to 326 conditions per place. [2022-11-25 18:09:12,872 INFO L137 encePairwiseOnDemand]: 241/255 looper letters, 38 selfloop transitions, 2 changer transitions 1/44 dead transitions. [2022-11-25 18:09:12,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 44 transitions, 178 flow [2022-11-25 18:09:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:09:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:09:12,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 400 transitions. [2022-11-25 18:09:12,887 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5228758169934641 [2022-11-25 18:09:12,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 400 transitions. [2022-11-25 18:09:12,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 400 transitions. [2022-11-25 18:09:12,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:12,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 400 transitions. [2022-11-25 18:09:12,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 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) [2022-11-25 18:09:12,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 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) [2022-11-25 18:09:12,903 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 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) [2022-11-25 18:09:12,905 INFO L175 Difference]: Start difference. First operand has 37 places, 44 transitions, 96 flow. Second operand 3 states and 400 transitions. [2022-11-25 18:09:12,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 44 transitions, 178 flow [2022-11-25 18:09:12,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 44 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:09:12,911 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 76 flow [2022-11-25 18:09:12,913 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2022-11-25 18:09:12,916 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2022-11-25 18:09:12,916 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 76 flow [2022-11-25 18:09:12,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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) [2022-11-25 18:09:12,917 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:12,917 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:09:12,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:09:12,918 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:09:12,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:12,918 INFO L85 PathProgramCache]: Analyzing trace with hash 16480, now seen corresponding path program 1 times [2022-11-25 18:09:12,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:12,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573530075] [2022-11-25 18:09:12,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:12,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:09:13,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:13,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573530075] [2022-11-25 18:09:13,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573530075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:13,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:13,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:09:13,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942123374] [2022-11-25 18:09:13,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:13,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:09:13,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:13,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:09:13,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:09:13,124 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 255 [2022-11-25 18:09:13,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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) [2022-11-25 18:09:13,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:13,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 255 [2022-11-25 18:09:13,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:13,230 INFO L130 PetriNetUnfolder]: 154/366 cut-off events. [2022-11-25 18:09:13,231 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:09:13,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 366 events. 154/366 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1625 event pairs, 0 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 691. Up to 328 conditions per place. [2022-11-25 18:09:13,234 INFO L137 encePairwiseOnDemand]: 251/255 looper letters, 39 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2022-11-25 18:09:13,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 182 flow [2022-11-25 18:09:13,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:09:13,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:09:13,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2022-11-25 18:09:13,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.515032679738562 [2022-11-25 18:09:13,237 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2022-11-25 18:09:13,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2022-11-25 18:09:13,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:13,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2022-11-25 18:09:13,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 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) [2022-11-25 18:09:13,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 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) [2022-11-25 18:09:13,241 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 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) [2022-11-25 18:09:13,242 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 76 flow. Second operand 3 states and 394 transitions. [2022-11-25 18:09:13,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 44 transitions, 182 flow [2022-11-25 18:09:13,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 44 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:09:13,244 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 82 flow [2022-11-25 18:09:13,244 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2022-11-25 18:09:13,245 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2022-11-25 18:09:13,245 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 82 flow [2022-11-25 18:09:13,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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) [2022-11-25 18:09:13,246 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:13,246 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:09:13,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:09:13,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:09:13,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:13,247 INFO L85 PathProgramCache]: Analyzing trace with hash 491292483, now seen corresponding path program 1 times [2022-11-25 18:09:13,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:13,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927082921] [2022-11-25 18:09:13,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:13,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:09:13,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:13,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927082921] [2022-11-25 18:09:13,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927082921] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:09:13,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739108527] [2022-11-25 18:09:13,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:13,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:13,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:09:13,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:09:13,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:09:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:13,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:09:13,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:09:13,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:09:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:09:13,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:09:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:09:13,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739108527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:09:13,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:09:13,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-25 18:09:13,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243704465] [2022-11-25 18:09:13,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:09:13,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:09:13,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:13,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:09:13,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:09:13,953 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 255 [2022-11-25 18:09:13,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 82 flow. Second operand has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 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) [2022-11-25 18:09:13,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:13,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 255 [2022-11-25 18:09:13,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:14,056 INFO L130 PetriNetUnfolder]: 22/66 cut-off events. [2022-11-25 18:09:14,056 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-25 18:09:14,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 66 events. 22/66 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 126 event pairs, 7 based on Foata normal form. 12/78 useless extension candidates. Maximal degree in co-relation 139. Up to 46 conditions per place. [2022-11-25 18:09:14,057 INFO L137 encePairwiseOnDemand]: 251/255 looper letters, 25 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2022-11-25 18:09:14,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 123 flow [2022-11-25 18:09:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:09:14,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:09:14,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 481 transitions. [2022-11-25 18:09:14,059 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4715686274509804 [2022-11-25 18:09:14,059 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 481 transitions. [2022-11-25 18:09:14,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 481 transitions. [2022-11-25 18:09:14,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:14,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 481 transitions. [2022-11-25 18:09:14,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 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) [2022-11-25 18:09:14,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 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) [2022-11-25 18:09:14,065 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 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) [2022-11-25 18:09:14,066 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 82 flow. Second operand 4 states and 481 transitions. [2022-11-25 18:09:14,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 123 flow [2022-11-25 18:09:14,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 29 transitions, 117 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 18:09:14,068 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 43 flow [2022-11-25 18:09:14,068 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=43, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2022-11-25 18:09:14,070 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, -14 predicate places. [2022-11-25 18:09:14,071 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 43 flow [2022-11-25 18:09:14,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 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) [2022-11-25 18:09:14,072 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:14,073 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 18:09:14,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 18:09:14,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:14,278 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:09:14,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:14,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1949801877, now seen corresponding path program 1 times [2022-11-25 18:09:14,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:14,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814028736] [2022-11-25 18:09:14,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:14,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:09:14,298 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:09:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:09:14,324 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:09:14,324 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:09:14,325 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-25 18:09:14,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-25 18:09:14,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-25 18:09:14,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-25 18:09:14,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-25 18:09:14,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-25 18:09:14,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-25 18:09:14,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:09:14,329 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-25 18:09:14,332 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:09:14,332 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 18:09:14,353 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:09:14,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 177 transitions, 372 flow [2022-11-25 18:09:14,398 INFO L130 PetriNetUnfolder]: 31/301 cut-off events. [2022-11-25 18:09:14,398 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-11-25 18:09:14,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 301 events. 31/301 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1000 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 185. Up to 8 conditions per place. [2022-11-25 18:09:14,402 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 177 transitions, 372 flow [2022-11-25 18:09:14,404 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 177 transitions, 372 flow [2022-11-25 18:09:14,404 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:09:14,405 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 177 transitions, 372 flow [2022-11-25 18:09:14,405 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 177 transitions, 372 flow [2022-11-25 18:09:14,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 177 transitions, 372 flow [2022-11-25 18:09:14,446 INFO L130 PetriNetUnfolder]: 31/301 cut-off events. [2022-11-25 18:09:14,447 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-11-25 18:09:14,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 301 events. 31/301 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1000 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 185. Up to 8 conditions per place. [2022-11-25 18:09:14,458 INFO L119 LiptonReduction]: Number of co-enabled transitions 12168 [2022-11-25 18:09:19,298 INFO L134 LiptonReduction]: Checked pairs total: 25831 [2022-11-25 18:09:19,299 INFO L136 LiptonReduction]: Total number of compositions: 147 [2022-11-25 18:09:19,301 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:09:19,302 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=PETRI_NET, 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;@dd892c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:09:19,303 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 18:09:19,304 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-11-25 18:09:19,305 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:09:19,305 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:19,305 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:09:19,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:09:19,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:19,306 INFO L85 PathProgramCache]: Analyzing trace with hash 28154, now seen corresponding path program 1 times [2022-11-25 18:09:19,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:19,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659736363] [2022-11-25 18:09:19,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:19,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:09:19,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:19,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659736363] [2022-11-25 18:09:19,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659736363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:19,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:19,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:09:19,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740003050] [2022-11-25 18:09:19,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:19,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:09:19,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:19,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:09:19,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:09:19,462 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 324 [2022-11-25 18:09:19,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 70 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 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) [2022-11-25 18:09:19,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:19,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 324 [2022-11-25 18:09:19,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:20,521 INFO L130 PetriNetUnfolder]: 4499/7698 cut-off events. [2022-11-25 18:09:20,521 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2022-11-25 18:09:20,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14979 conditions, 7698 events. 4499/7698 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 50362 event pairs, 2110 based on Foata normal form. 880/7280 useless extension candidates. Maximal degree in co-relation 1177. Up to 7176 conditions per place. [2022-11-25 18:09:20,570 INFO L137 encePairwiseOnDemand]: 305/324 looper letters, 55 selfloop transitions, 2 changer transitions 1/69 dead transitions. [2022-11-25 18:09:20,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 272 flow [2022-11-25 18:09:20,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:09:20,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:09:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 531 transitions. [2022-11-25 18:09:20,573 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2022-11-25 18:09:20,573 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 531 transitions. [2022-11-25 18:09:20,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 531 transitions. [2022-11-25 18:09:20,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:20,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 531 transitions. [2022-11-25 18:09:20,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 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) [2022-11-25 18:09:20,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 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) [2022-11-25 18:09:20,580 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 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) [2022-11-25 18:09:20,581 INFO L175 Difference]: Start difference. First operand has 58 places, 70 transitions, 158 flow. Second operand 3 states and 531 transitions. [2022-11-25 18:09:20,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 272 flow [2022-11-25 18:09:20,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:09:20,590 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 140 flow [2022-11-25 18:09:20,590 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2022-11-25 18:09:20,593 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2022-11-25 18:09:20,593 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 140 flow [2022-11-25 18:09:20,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 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) [2022-11-25 18:09:20,594 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:20,594 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:09:20,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:09:20,596 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:09:20,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:20,596 INFO L85 PathProgramCache]: Analyzing trace with hash 28153, now seen corresponding path program 1 times [2022-11-25 18:09:20,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:20,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687947970] [2022-11-25 18:09:20,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:20,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:09:20,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:20,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687947970] [2022-11-25 18:09:20,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687947970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:20,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:20,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:09:20,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442442196] [2022-11-25 18:09:20,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:20,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:09:20,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:20,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:09:20,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:09:20,690 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 324 [2022-11-25 18:09:20,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 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) [2022-11-25 18:09:20,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:20,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 324 [2022-11-25 18:09:20,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:21,668 INFO L130 PetriNetUnfolder]: 3723/6338 cut-off events. [2022-11-25 18:09:21,668 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2022-11-25 18:09:21,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12817 conditions, 6338 events. 3723/6338 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 39254 event pairs, 3448 based on Foata normal form. 0/5640 useless extension candidates. Maximal degree in co-relation 12728. Up to 5539 conditions per place. [2022-11-25 18:09:21,719 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 61 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2022-11-25 18:09:21,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 304 flow [2022-11-25 18:09:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:09:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:09:21,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 505 transitions. [2022-11-25 18:09:21,722 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5195473251028807 [2022-11-25 18:09:21,722 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 505 transitions. [2022-11-25 18:09:21,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 505 transitions. [2022-11-25 18:09:21,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:21,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 505 transitions. [2022-11-25 18:09:21,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 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) [2022-11-25 18:09:21,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 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) [2022-11-25 18:09:21,729 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 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) [2022-11-25 18:09:21,729 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 140 flow. Second operand 3 states and 505 transitions. [2022-11-25 18:09:21,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 304 flow [2022-11-25 18:09:21,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 74 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:09:21,736 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 138 flow [2022-11-25 18:09:21,736 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2022-11-25 18:09:21,741 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 1 predicate places. [2022-11-25 18:09:21,747 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 138 flow [2022-11-25 18:09:21,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 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) [2022-11-25 18:09:21,748 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:21,749 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:09:21,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:09:21,750 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:09:21,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash 250654915, now seen corresponding path program 1 times [2022-11-25 18:09:21,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:21,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299942558] [2022-11-25 18:09:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:21,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:09:21,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:21,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299942558] [2022-11-25 18:09:21,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299942558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:09:21,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058372525] [2022-11-25 18:09:21,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:21,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:21,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:09:21,882 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:09:21,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:09:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:21,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:09:21,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:09:22,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:09:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:09:22,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:09:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:09:22,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058372525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:09:22,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:09:22,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-25 18:09:22,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112856787] [2022-11-25 18:09:22,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:09:22,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:09:22,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:22,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:09:22,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:09:22,289 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 324 [2022-11-25 18:09:22,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 138 flow. Second operand has 8 states, 8 states have (on average 147.875) internal successors, (1183), 8 states have internal predecessors, (1183), 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) [2022-11-25 18:09:22,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:22,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 324 [2022-11-25 18:09:22,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:22,637 INFO L130 PetriNetUnfolder]: 625/1255 cut-off events. [2022-11-25 18:09:22,637 INFO L131 PetriNetUnfolder]: For 288/288 co-relation queries the response was YES. [2022-11-25 18:09:22,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2768 conditions, 1255 events. 625/1255 cut-off events. For 288/288 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 6777 event pairs, 0 based on Foata normal form. 144/1398 useless extension candidates. Maximal degree in co-relation 2758. Up to 746 conditions per place. [2022-11-25 18:09:22,648 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 58 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2022-11-25 18:09:22,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 70 transitions, 282 flow [2022-11-25 18:09:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:09:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:09:22,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 795 transitions. [2022-11-25 18:09:22,652 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2022-11-25 18:09:22,652 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 795 transitions. [2022-11-25 18:09:22,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 795 transitions. [2022-11-25 18:09:22,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:22,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 795 transitions. [2022-11-25 18:09:22,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 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) [2022-11-25 18:09:22,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 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) [2022-11-25 18:09:22,659 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 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) [2022-11-25 18:09:22,659 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 138 flow. Second operand 5 states and 795 transitions. [2022-11-25 18:09:22,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 70 transitions, 282 flow [2022-11-25 18:09:22,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 70 transitions, 279 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:09:22,666 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 95 flow [2022-11-25 18:09:22,666 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=95, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2022-11-25 18:09:22,668 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, -11 predicate places. [2022-11-25 18:09:22,668 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 95 flow [2022-11-25 18:09:22,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 147.875) internal successors, (1183), 8 states have internal predecessors, (1183), 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) [2022-11-25 18:09:22,669 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:22,669 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 18:09:22,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:09:22,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:22,875 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:09:22,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:22,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1927637901, now seen corresponding path program 1 times [2022-11-25 18:09:22,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:22,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223938829] [2022-11-25 18:09:22,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:22,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:09:22,895 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:09:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:09:22,927 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:09:22,927 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:09:22,927 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-25 18:09:22,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-25 18:09:22,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-25 18:09:22,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-25 18:09:22,933 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-25 18:09:22,933 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-25 18:09:22,934 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-25 18:09:22,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:09:22,934 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-25 18:09:22,935 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:09:22,935 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 18:09:22,974 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 18:09:22,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 218 transitions, 466 flow [2022-11-25 18:09:23,049 INFO L130 PetriNetUnfolder]: 50/462 cut-off events. [2022-11-25 18:09:23,050 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-11-25 18:09:23,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 462 events. 50/462 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1754 event pairs, 1 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 309. Up to 16 conditions per place. [2022-11-25 18:09:23,056 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 218 transitions, 466 flow [2022-11-25 18:09:23,067 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 218 transitions, 466 flow [2022-11-25 18:09:23,067 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:09:23,067 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 218 transitions, 466 flow [2022-11-25 18:09:23,067 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 218 transitions, 466 flow [2022-11-25 18:09:23,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 218 transitions, 466 flow [2022-11-25 18:09:23,198 INFO L130 PetriNetUnfolder]: 50/462 cut-off events. [2022-11-25 18:09:23,198 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-11-25 18:09:23,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 462 events. 50/462 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1754 event pairs, 1 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 309. Up to 16 conditions per place. [2022-11-25 18:09:23,223 INFO L119 LiptonReduction]: Number of co-enabled transitions 23166 [2022-11-25 18:09:29,194 INFO L134 LiptonReduction]: Checked pairs total: 54264 [2022-11-25 18:09:29,195 INFO L136 LiptonReduction]: Total number of compositions: 180 [2022-11-25 18:09:29,196 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:09:29,197 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=PETRI_NET, 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;@dd892c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:09:29,197 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 18:09:29,199 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-11-25 18:09:29,199 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:09:29,200 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:29,200 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:09:29,200 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:09:29,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:29,201 INFO L85 PathProgramCache]: Analyzing trace with hash 42190, now seen corresponding path program 1 times [2022-11-25 18:09:29,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:29,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513030688] [2022-11-25 18:09:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:29,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:09:29,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:29,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513030688] [2022-11-25 18:09:29,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513030688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:29,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:29,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:09:29,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363855468] [2022-11-25 18:09:29,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:29,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:09:29,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:29,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:09:29,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:09:29,257 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 398 [2022-11-25 18:09:29,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 91 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 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) [2022-11-25 18:09:29,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:29,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 398 [2022-11-25 18:09:29,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:38,699 INFO L130 PetriNetUnfolder]: 57994/88582 cut-off events. [2022-11-25 18:09:38,699 INFO L131 PetriNetUnfolder]: For 1372/1372 co-relation queries the response was YES. [2022-11-25 18:09:38,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170637 conditions, 88582 events. 57994/88582 cut-off events. For 1372/1372 co-relation queries the response was YES. Maximal size of possible extension queue 1922. Compared 697788 event pairs, 49965 based on Foata normal form. 12223/90513 useless extension candidates. Maximal degree in co-relation 58100. Up to 70020 conditions per place. [2022-11-25 18:09:39,285 INFO L137 encePairwiseOnDemand]: 373/398 looper letters, 78 selfloop transitions, 2 changer transitions 1/98 dead transitions. [2022-11-25 18:09:39,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 98 transitions, 388 flow [2022-11-25 18:09:39,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:09:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:09:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 661 transitions. [2022-11-25 18:09:39,290 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5536013400335008 [2022-11-25 18:09:39,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 661 transitions. [2022-11-25 18:09:39,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 661 transitions. [2022-11-25 18:09:39,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:39,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 661 transitions. [2022-11-25 18:09:39,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 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) [2022-11-25 18:09:39,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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) [2022-11-25 18:09:39,297 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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) [2022-11-25 18:09:39,298 INFO L175 Difference]: Start difference. First operand has 75 places, 91 transitions, 212 flow. Second operand 3 states and 661 transitions. [2022-11-25 18:09:39,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 98 transitions, 388 flow [2022-11-25 18:09:39,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 98 transitions, 388 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:09:39,308 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 170 flow [2022-11-25 18:09:39,309 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-11-25 18:09:39,310 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, 0 predicate places. [2022-11-25 18:09:39,311 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 170 flow [2022-11-25 18:09:39,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 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) [2022-11-25 18:09:39,311 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:39,312 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:09:39,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 18:09:39,312 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:09:39,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:39,313 INFO L85 PathProgramCache]: Analyzing trace with hash 42189, now seen corresponding path program 1 times [2022-11-25 18:09:39,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:39,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575624353] [2022-11-25 18:09:39,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:39,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:09:39,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:39,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575624353] [2022-11-25 18:09:39,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575624353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:39,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:39,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:09:39,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726296073] [2022-11-25 18:09:39,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:39,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:09:39,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:39,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:09:39,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:09:39,440 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 398 [2022-11-25 18:09:39,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 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) [2022-11-25 18:09:39,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:39,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 398 [2022-11-25 18:09:39,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:46,827 INFO L130 PetriNetUnfolder]: 54057/83071 cut-off events. [2022-11-25 18:09:46,827 INFO L131 PetriNetUnfolder]: For 2494/2494 co-relation queries the response was YES. [2022-11-25 18:09:46,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161219 conditions, 83071 events. 54057/83071 cut-off events. For 2494/2494 co-relation queries the response was YES. Maximal size of possible extension queue 1835. Compared 654691 event pairs, 34991 based on Foata normal form. 0/76618 useless extension candidates. Maximal degree in co-relation 148190. Up to 75519 conditions per place. [2022-11-25 18:09:47,370 INFO L137 encePairwiseOnDemand]: 394/398 looper letters, 61 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2022-11-25 18:09:47,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 80 transitions, 320 flow [2022-11-25 18:09:47,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:09:47,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:09:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 614 transitions. [2022-11-25 18:09:47,374 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5142378559463987 [2022-11-25 18:09:47,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 614 transitions. [2022-11-25 18:09:47,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 614 transitions. [2022-11-25 18:09:47,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:47,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 614 transitions. [2022-11-25 18:09:47,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 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) [2022-11-25 18:09:47,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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) [2022-11-25 18:09:47,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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) [2022-11-25 18:09:47,384 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 170 flow. Second operand 3 states and 614 transitions. [2022-11-25 18:09:47,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 80 transitions, 320 flow [2022-11-25 18:09:47,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 80 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:09:47,641 INFO L231 Difference]: Finished difference. Result has 75 places, 69 transitions, 180 flow [2022-11-25 18:09:47,641 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=75, PETRI_TRANSITIONS=69} [2022-11-25 18:09:47,642 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, 0 predicate places. [2022-11-25 18:09:47,642 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 69 transitions, 180 flow [2022-11-25 18:09:47,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 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) [2022-11-25 18:09:47,643 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:47,643 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:09:47,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 18:09:47,644 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:09:47,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:47,644 INFO L85 PathProgramCache]: Analyzing trace with hash 340693527, now seen corresponding path program 1 times [2022-11-25 18:09:47,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:47,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205513760] [2022-11-25 18:09:47,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:47,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:09:47,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:47,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205513760] [2022-11-25 18:09:47,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205513760] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:09:47,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263157623] [2022-11-25 18:09:47,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:47,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:47,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:09:47,778 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:09:47,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:09:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:47,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:09:47,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:09:47,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:09:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:09:47,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:09:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:09:48,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263157623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:09:48,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:09:48,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 18:09:48,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474556669] [2022-11-25 18:09:48,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:09:48,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:09:48,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:48,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:09:48,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:09:48,172 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 398 [2022-11-25 18:09:48,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 69 transitions, 180 flow. Second operand has 7 states, 7 states have (on average 181.71428571428572) internal successors, (1272), 7 states have internal predecessors, (1272), 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) [2022-11-25 18:09:48,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:48,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 398 [2022-11-25 18:09:48,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:54,465 INFO L130 PetriNetUnfolder]: 51221/75455 cut-off events. [2022-11-25 18:09:54,465 INFO L131 PetriNetUnfolder]: For 5778/5778 co-relation queries the response was YES. [2022-11-25 18:09:54,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154459 conditions, 75455 events. 51221/75455 cut-off events. For 5778/5778 co-relation queries the response was YES. Maximal size of possible extension queue 1658. Compared 564012 event pairs, 35 based on Foata normal form. 11/70678 useless extension candidates. Maximal degree in co-relation 14454. Up to 58106 conditions per place. [2022-11-25 18:09:55,208 INFO L137 encePairwiseOnDemand]: 393/398 looper letters, 151 selfloop transitions, 6 changer transitions 0/174 dead transitions. [2022-11-25 18:09:55,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 174 transitions, 712 flow [2022-11-25 18:09:55,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:09:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:09:55,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1241 transitions. [2022-11-25 18:09:55,214 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5196817420435511 [2022-11-25 18:09:55,214 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1241 transitions. [2022-11-25 18:09:55,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1241 transitions. [2022-11-25 18:09:55,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:55,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1241 transitions. [2022-11-25 18:09:55,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 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) [2022-11-25 18:09:55,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 398.0) internal successors, (2786), 7 states have internal predecessors, (2786), 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) [2022-11-25 18:09:55,225 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 398.0) internal successors, (2786), 7 states have internal predecessors, (2786), 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) [2022-11-25 18:09:55,225 INFO L175 Difference]: Start difference. First operand has 75 places, 69 transitions, 180 flow. Second operand 6 states and 1241 transitions. [2022-11-25 18:09:55,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 174 transitions, 712 flow [2022-11-25 18:09:55,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 174 transitions, 710 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:09:55,234 INFO L231 Difference]: Finished difference. Result has 79 places, 70 transitions, 196 flow [2022-11-25 18:09:55,234 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=79, PETRI_TRANSITIONS=70} [2022-11-25 18:09:55,235 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, 4 predicate places. [2022-11-25 18:09:55,235 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 70 transitions, 196 flow [2022-11-25 18:09:55,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 181.71428571428572) internal successors, (1272), 7 states have internal predecessors, (1272), 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) [2022-11-25 18:09:55,236 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:55,236 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 18:09:55,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:09:55,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9558a3fa-284d-4f9c-959f-06765a1148ac/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:55,443 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:09:55,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:55,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1781495319, now seen corresponding path program 1 times [2022-11-25 18:09:55,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:55,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288855711] [2022-11-25 18:09:55,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:55,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:09:55,476 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:09:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:09:55,508 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:09:55,512 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:09:55,512 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-25 18:09:55,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-25 18:09:55,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-25 18:09:55,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-25 18:09:55,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-25 18:09:55,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-25 18:09:55,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-25 18:09:55,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 18:09:55,514 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-25 18:09:55,514 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:09:55,514 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 18:09:55,551 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 18:09:55,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 259 transitions, 562 flow [2022-11-25 18:09:55,672 INFO L130 PetriNetUnfolder]: 81/711 cut-off events. [2022-11-25 18:09:55,672 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2022-11-25 18:09:55,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 711 events. 81/711 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3165 event pairs, 6 based on Foata normal form. 0/567 useless extension candidates. Maximal degree in co-relation 482. Up to 32 conditions per place. [2022-11-25 18:09:55,682 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 259 transitions, 562 flow [2022-11-25 18:09:55,691 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 235 places, 259 transitions, 562 flow [2022-11-25 18:09:55,691 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:09:55,692 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 235 places, 259 transitions, 562 flow [2022-11-25 18:09:55,692 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 235 places, 259 transitions, 562 flow [2022-11-25 18:09:55,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 259 transitions, 562 flow [2022-11-25 18:09:55,827 INFO L130 PetriNetUnfolder]: 81/711 cut-off events. [2022-11-25 18:09:55,828 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2022-11-25 18:09:55,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 711 events. 81/711 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3165 event pairs, 6 based on Foata normal form. 0/567 useless extension candidates. Maximal degree in co-relation 482. Up to 32 conditions per place. [2022-11-25 18:09:55,868 INFO L119 LiptonReduction]: Number of co-enabled transitions 37440 [2022-11-25 18:10:01,815 INFO L134 LiptonReduction]: Checked pairs total: 90404 [2022-11-25 18:10:01,815 INFO L136 LiptonReduction]: Total number of compositions: 210 [2022-11-25 18:10:01,817 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:10:01,818 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=PETRI_NET, 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;@dd892c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:10:01,818 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 18:10:01,820 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2022-11-25 18:10:01,821 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:10:01,821 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:01,821 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:10:01,822 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:10:01,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:01,822 INFO L85 PathProgramCache]: Analyzing trace with hash 58478, now seen corresponding path program 1 times [2022-11-25 18:10:01,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:01,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134723981] [2022-11-25 18:10:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:01,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:10:01,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:01,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134723981] [2022-11-25 18:10:01,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134723981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:01,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:01,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:10:01,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772714050] [2022-11-25 18:10:01,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:01,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:10:01,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:01,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:10:01,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:10:01,930 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 469 [2022-11-25 18:10:01,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 114 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 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) [2022-11-25 18:10:01,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:01,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 469 [2022-11-25 18:10:01,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand