./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-lit/sssc12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a42d14-f698-4349-b207-32c699f0a336/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a42d14-f698-4349-b207-32c699f0a336/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a42d14-f698-4349-b207-32c699f0a336/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a42d14-f698-4349-b207-32c699f0a336/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-lit/sssc12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a42d14-f698-4349-b207-32c699f0a336/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a42d14-f698-4349-b207-32c699f0a336/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3f447624cefe078f3d1dfeed3af04dfcf2078828fba23b82e0579b17d6eb7f02 --- 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-b5237d8 [2022-11-21 16:26:19,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:26:19,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:26:19,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:26:19,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:26:19,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:26:19,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:26:19,509 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:26:19,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:26:19,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:26:19,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:26:19,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:26:19,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:26:19,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:26:19,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:26:19,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:26:19,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:26:19,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:26:19,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:26:19,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:26:19,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:26:19,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:26:19,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:26:19,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:26:19,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:26:19,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:26:19,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:26:19,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:26:19,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:26:19,535 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:26:19,535 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:26:19,536 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:26:19,537 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:26:19,538 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:26:19,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:26:19,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:26:19,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:26:19,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:26:19,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:26:19,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:26:19,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:26:19,544 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a42d14-f698-4349-b207-32c699f0a336/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:26:19,565 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:26:19,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:26:19,566 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:26:19,566 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:26:19,567 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:26:19,567 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:26:19,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:26:19,568 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:26:19,568 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:26:19,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:26:19,569 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:26:19,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:26:19,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:26:19,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:26:19,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:26:19,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:26:19,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:26:19,571 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:26:19,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:26:19,572 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:26:19,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:26:19,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:26:19,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:26:19,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:26:19,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:26:19,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:26:19,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:26:19,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:26:19,574 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:26:19,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:26:19,575 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:26:19,575 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:26:19,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:26:19,576 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a42d14-f698-4349-b207-32c699f0a336/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a42d14-f698-4349-b207-32c699f0a336/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f447624cefe078f3d1dfeed3af04dfcf2078828fba23b82e0579b17d6eb7f02 [2022-11-21 16:26:19,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:26:19,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:26:19,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:26:19,835 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:26:19,836 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:26:19,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a42d14-f698-4349-b207-32c699f0a336/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/pthread-lit/sssc12.i [2022-11-21 16:26:22,871 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:26:23,204 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:26:23,204 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a42d14-f698-4349-b207-32c699f0a336/sv-benchmarks/c/pthread-lit/sssc12.i [2022-11-21 16:26:23,230 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a42d14-f698-4349-b207-32c699f0a336/bin/uautomizer-vX5HgA9Q3a/data/9c33f3215/da8d63afa71e414e82db738cd9970ac9/FLAG3c5bc8d3b [2022-11-21 16:26:23,248 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a42d14-f698-4349-b207-32c699f0a336/bin/uautomizer-vX5HgA9Q3a/data/9c33f3215/da8d63afa71e414e82db738cd9970ac9 [2022-11-21 16:26:23,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:26:23,256 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:26:23,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:26:23,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:26:23,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:26:23,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:26:23" (1/1) ... [2022-11-21 16:26:23,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fee6526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:23, skipping insertion in model container [2022-11-21 16:26:23,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:26:23" (1/1) ... [2022-11-21 16:26:23,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:26:23,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:26:23,763 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_59a42d14-f698-4349-b207-32c699f0a336/sv-benchmarks/c/pthread-lit/sssc12.i[46865,46878] [2022-11-21 16:26:23,782 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:26:23,791 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:26:23,830 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_59a42d14-f698-4349-b207-32c699f0a336/sv-benchmarks/c/pthread-lit/sssc12.i[46865,46878] [2022-11-21 16:26:23,836 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:26:23,891 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:26:23,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:23 WrapperNode [2022-11-21 16:26:23,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:26:23,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:26:23,893 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:26:23,893 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:26:23,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:23" (1/1) ... [2022-11-21 16:26:23,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:23" (1/1) ... [2022-11-21 16:26:23,937 INFO L138 Inliner]: procedures = 275, calls = 23, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 82 [2022-11-21 16:26:23,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:26:23,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:26:23,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:26:23,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:26:23,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:23" (1/1) ... [2022-11-21 16:26:23,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:23" (1/1) ... [2022-11-21 16:26:23,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:23" (1/1) ... [2022-11-21 16:26:23,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:23" (1/1) ... [2022-11-21 16:26:23,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:23" (1/1) ... [2022-11-21 16:26:23,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:23" (1/1) ... [2022-11-21 16:26:23,963 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:23" (1/1) ... [2022-11-21 16:26:23,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:23" (1/1) ... [2022-11-21 16:26:23,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:26:23,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:26:23,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:26:23,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:26:23,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:23" (1/1) ... [2022-11-21 16:26:23,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:26:23,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a42d14-f698-4349-b207-32c699f0a336/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:26:24,000 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a42d14-f698-4349-b207-32c699f0a336/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:26:24,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 16:26:24,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a42d14-f698-4349-b207-32c699f0a336/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:26:24,047 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2022-11-21 16:26:24,048 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2022-11-21 16:26:24,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:26:24,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:26:24,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 16:26:24,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:26:24,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:26:24,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:26:24,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:26:24,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:26:24,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:26:24,054 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:26:24,272 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:26:24,274 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:26:24,457 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:26:24,501 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:26:24,502 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 16:26:24,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:26:24 BoogieIcfgContainer [2022-11-21 16:26:24,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:26:24,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:26:24,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:26:24,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:26:24,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:26:23" (1/3) ... [2022-11-21 16:26:24,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2673e486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:26:24, skipping insertion in model container [2022-11-21 16:26:24,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:23" (2/3) ... [2022-11-21 16:26:24,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2673e486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:26:24, skipping insertion in model container [2022-11-21 16:26:24,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:26:24" (3/3) ... [2022-11-21 16:26:24,513 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12.i [2022-11-21 16:26:24,528 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:26:24,539 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:26:24,539 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:26:24,540 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:26:24,620 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 16:26:24,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 82 transitions, 169 flow [2022-11-21 16:26:24,743 INFO L130 PetriNetUnfolder]: 7/94 cut-off events. [2022-11-21 16:26:24,743 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:26:24,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 78 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2022-11-21 16:26:24,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 82 transitions, 169 flow [2022-11-21 16:26:24,755 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 82 transitions, 169 flow [2022-11-21 16:26:24,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:26:24,777 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9736dd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:26:24,778 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-21 16:26:24,814 INFO L130 PetriNetUnfolder]: 3/64 cut-off events. [2022-11-21 16:26:24,815 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:26:24,815 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:26:24,816 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:26:24,817 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:26:24,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:26:24,822 INFO L85 PathProgramCache]: Analyzing trace with hash -2038037136, now seen corresponding path program 1 times [2022-11-21 16:26:24,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:26:24,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815832912] [2022-11-21 16:26:24,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:26:24,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:26:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:26:25,040 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:26:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:26:25,096 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:26:25,098 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:26:25,099 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-21 16:26:25,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-21 16:26:25,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-21 16:26:25,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:26:25,103 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-21 16:26:25,106 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 16:26:25,107 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-21 16:26:25,131 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 16:26:25,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 116 transitions, 244 flow [2022-11-21 16:26:25,164 INFO L130 PetriNetUnfolder]: 12/142 cut-off events. [2022-11-21 16:26:25,165 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 16:26:25,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 142 events. 12/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 250 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 95. Up to 6 conditions per place. [2022-11-21 16:26:25,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 116 transitions, 244 flow [2022-11-21 16:26:25,169 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 116 transitions, 244 flow [2022-11-21 16:26:25,170 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:26:25,171 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9736dd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:26:25,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-21 16:26:25,190 INFO L130 PetriNetUnfolder]: 6/99 cut-off events. [2022-11-21 16:26:25,190 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 16:26:25,191 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:26:25,191 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:26:25,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-21 16:26:25,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:26:25,192 INFO L85 PathProgramCache]: Analyzing trace with hash 45538975, now seen corresponding path program 1 times [2022-11-21 16:26:25,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:26:25,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627947157] [2022-11-21 16:26:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:26:25,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:26:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:26:25,241 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:26:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:26:25,299 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:26:25,300 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:26:25,300 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-21 16:26:25,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-21 16:26:25,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-21 16:26:25,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-21 16:26:25,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:26:25,305 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-21 16:26:25,311 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 16:26:25,312 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-21 16:26:25,356 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 16:26:25,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 150 transitions, 321 flow [2022-11-21 16:26:25,453 INFO L130 PetriNetUnfolder]: 17/190 cut-off events. [2022-11-21 16:26:25,453 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-21 16:26:25,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 190 events. 17/190 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 436 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2022-11-21 16:26:25,460 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 150 transitions, 321 flow [2022-11-21 16:26:25,465 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 150 transitions, 321 flow [2022-11-21 16:26:25,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:26:25,473 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9736dd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:26:25,474 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-21 16:26:25,510 INFO L130 PetriNetUnfolder]: 8/129 cut-off events. [2022-11-21 16:26:25,510 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-21 16:26:25,510 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:26:25,510 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:26:25,512 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-21 16:26:25,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:26:25,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1613414299, now seen corresponding path program 1 times [2022-11-21 16:26:25,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:26:25,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132283792] [2022-11-21 16:26:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:26:25,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:26:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:26:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:26:25,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:26:25,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132283792] [2022-11-21 16:26:25,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132283792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:26:25,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:26:25,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:26:25,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374774599] [2022-11-21 16:26:25,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:26:25,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:26:25,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:26:25,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:26:25,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:26:25,950 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 150 [2022-11-21 16:26:25,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 150 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 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) [2022-11-21 16:26:25,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:26:25,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 150 [2022-11-21 16:26:25,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:26:26,387 INFO L130 PetriNetUnfolder]: 372/1535 cut-off events. [2022-11-21 16:26:26,388 INFO L131 PetriNetUnfolder]: For 340/340 co-relation queries the response was YES. [2022-11-21 16:26:26,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2301 conditions, 1535 events. 372/1535 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 11800 event pairs, 193 based on Foata normal form. 447/1822 useless extension candidates. Maximal degree in co-relation 1582. Up to 362 conditions per place. [2022-11-21 16:26:26,410 INFO L137 encePairwiseOnDemand]: 137/150 looper letters, 32 selfloop transitions, 3 changer transitions 1/146 dead transitions. [2022-11-21 16:26:26,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 146 transitions, 407 flow [2022-11-21 16:26:26,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:26:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 16:26:26,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 526 transitions. [2022-11-21 16:26:26,430 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8766666666666667 [2022-11-21 16:26:26,431 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 526 transitions. [2022-11-21 16:26:26,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 526 transitions. [2022-11-21 16:26:26,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:26:26,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 526 transitions. [2022-11-21 16:26:26,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.5) internal successors, (526), 4 states have internal predecessors, (526), 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) [2022-11-21 16:26:26,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 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) [2022-11-21 16:26:26,454 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 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) [2022-11-21 16:26:26,457 INFO L175 Difference]: Start difference. First operand has 143 places, 150 transitions, 321 flow. Second operand 4 states and 526 transitions. [2022-11-21 16:26:26,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 146 transitions, 407 flow [2022-11-21 16:26:26,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 146 transitions, 397 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-11-21 16:26:26,466 INFO L231 Difference]: Finished difference. Result has 137 places, 131 transitions, 287 flow [2022-11-21 16:26:26,468 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=287, PETRI_PLACES=137, PETRI_TRANSITIONS=131} [2022-11-21 16:26:26,477 INFO L288 CegarLoopForPetriNet]: 143 programPoint places, -6 predicate places. [2022-11-21 16:26:26,479 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 131 transitions, 287 flow [2022-11-21 16:26:26,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 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) [2022-11-21 16:26:26,479 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:26:26,480 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:26:26,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:26:26,480 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-21 16:26:26,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:26:26,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1301607399, now seen corresponding path program 1 times [2022-11-21 16:26:26,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:26:26,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102922164] [2022-11-21 16:26:26,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:26:26,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:26:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:26:26,539 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:26:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:26:26,564 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:26:26,569 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:26:26,569 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-21 16:26:26,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-21 16:26:26,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-21 16:26:26,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-21 16:26:26,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-21 16:26:26,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:26:26,571 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-21 16:26:26,571 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 16:26:26,571 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-21 16:26:26,607 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 16:26:26,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 184 transitions, 400 flow [2022-11-21 16:26:26,648 INFO L130 PetriNetUnfolder]: 22/238 cut-off events. [2022-11-21 16:26:26,648 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-21 16:26:26,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 238 events. 22/238 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 631 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 198. Up to 10 conditions per place. [2022-11-21 16:26:26,651 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 184 transitions, 400 flow [2022-11-21 16:26:26,654 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 184 transitions, 400 flow [2022-11-21 16:26:26,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:26:26,662 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9736dd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:26:26,662 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-21 16:26:26,691 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2022-11-21 16:26:26,691 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-21 16:26:26,692 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:26:26,692 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:26:26,692 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-21 16:26:26,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:26:26,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1522313636, now seen corresponding path program 1 times [2022-11-21 16:26:26,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:26:26,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088278323] [2022-11-21 16:26:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:26:26,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:26:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:26:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:26:26,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:26:26,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088278323] [2022-11-21 16:26:26,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088278323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:26:26,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:26:26,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:26:26,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299286642] [2022-11-21 16:26:26,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:26:26,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:26:26,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:26:26,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:26:26,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:26:26,816 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 184 [2022-11-21 16:26:26,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 184 transitions, 400 flow. Second operand has 4 states, 4 states have (on average 147.25) internal successors, (589), 4 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:26,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:26:26,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 184 [2022-11-21 16:26:26,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:26:28,610 INFO L130 PetriNetUnfolder]: 1890/7960 cut-off events. [2022-11-21 16:26:28,610 INFO L131 PetriNetUnfolder]: For 1861/1861 co-relation queries the response was YES. [2022-11-21 16:26:28,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11030 conditions, 7960 events. 1890/7960 cut-off events. For 1861/1861 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 87963 event pairs, 1192 based on Foata normal form. 1746/8795 useless extension candidates. Maximal degree in co-relation 3675. Up to 1452 conditions per place. [2022-11-21 16:26:28,768 INFO L137 encePairwiseOnDemand]: 169/184 looper letters, 41 selfloop transitions, 3 changer transitions 1/183 dead transitions. [2022-11-21 16:26:28,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 183 transitions, 528 flow [2022-11-21 16:26:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:26:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 16:26:28,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 653 transitions. [2022-11-21 16:26:28,771 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8872282608695652 [2022-11-21 16:26:28,771 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 653 transitions. [2022-11-21 16:26:28,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 653 transitions. [2022-11-21 16:26:28,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:26:28,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 653 transitions. [2022-11-21 16:26:28,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 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) [2022-11-21 16:26:28,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 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) [2022-11-21 16:26:28,776 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 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) [2022-11-21 16:26:28,778 INFO L175 Difference]: Start difference. First operand has 175 places, 184 transitions, 400 flow. Second operand 4 states and 653 transitions. [2022-11-21 16:26:28,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 183 transitions, 528 flow [2022-11-21 16:26:28,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 183 transitions, 504 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-11-21 16:26:28,792 INFO L231 Difference]: Finished difference. Result has 168 places, 162 transitions, 354 flow [2022-11-21 16:26:28,793 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=354, PETRI_PLACES=168, PETRI_TRANSITIONS=162} [2022-11-21 16:26:28,794 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, -7 predicate places. [2022-11-21 16:26:28,794 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 162 transitions, 354 flow [2022-11-21 16:26:28,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.25) internal successors, (589), 4 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:28,796 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:26:28,796 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:26:28,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:26:28,801 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-21 16:26:28,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:26:28,802 INFO L85 PathProgramCache]: Analyzing trace with hash -945135595, now seen corresponding path program 1 times [2022-11-21 16:26:28,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:26:28,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218020911] [2022-11-21 16:26:28,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:26:28,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:26:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:26:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:26:29,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:26:29,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218020911] [2022-11-21 16:26:29,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218020911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:26:29,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:26:29,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:26:29,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25844205] [2022-11-21 16:26:29,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:26:29,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:26:29,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:26:29,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:26:29,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:26:29,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 184 [2022-11-21 16:26:29,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 162 transitions, 354 flow. Second operand has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 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) [2022-11-21 16:26:29,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:26:29,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 184 [2022-11-21 16:26:29,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:26:51,622 INFO L130 PetriNetUnfolder]: 85323/157903 cut-off events. [2022-11-21 16:26:51,623 INFO L131 PetriNetUnfolder]: For 13381/13381 co-relation queries the response was YES. [2022-11-21 16:26:52,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287877 conditions, 157903 events. 85323/157903 cut-off events. For 13381/13381 co-relation queries the response was YES. Maximal size of possible extension queue 6057. Compared 1864031 event pairs, 7373 based on Foata normal form. 0/143627 useless extension candidates. Maximal degree in co-relation 287572. Up to 33498 conditions per place. [2022-11-21 16:26:53,588 INFO L137 encePairwiseOnDemand]: 163/184 looper letters, 273 selfloop transitions, 21 changer transitions 0/404 dead transitions. [2022-11-21 16:26:53,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 404 transitions, 1565 flow [2022-11-21 16:26:53,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:26:53,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-21 16:26:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1473 transitions. [2022-11-21 16:26:53,592 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8005434782608696 [2022-11-21 16:26:53,593 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1473 transitions. [2022-11-21 16:26:53,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1473 transitions. [2022-11-21 16:26:53,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:26:53,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1473 transitions. [2022-11-21 16:26:53,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 147.3) internal successors, (1473), 10 states have internal predecessors, (1473), 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) [2022-11-21 16:26:53,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 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) [2022-11-21 16:26:53,603 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 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) [2022-11-21 16:26:53,603 INFO L175 Difference]: Start difference. First operand has 168 places, 162 transitions, 354 flow. Second operand 10 states and 1473 transitions. [2022-11-21 16:26:53,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 404 transitions, 1565 flow [2022-11-21 16:26:53,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 404 transitions, 1549 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 16:26:53,749 INFO L231 Difference]: Finished difference. Result has 182 places, 182 transitions, 532 flow [2022-11-21 16:26:53,750 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=532, PETRI_PLACES=182, PETRI_TRANSITIONS=182} [2022-11-21 16:26:53,753 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 7 predicate places. [2022-11-21 16:26:53,753 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 182 transitions, 532 flow [2022-11-21 16:26:53,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 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) [2022-11-21 16:26:53,754 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:26:53,754 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:26:53,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:26:53,755 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-21 16:26:53,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:26:53,756 INFO L85 PathProgramCache]: Analyzing trace with hash -165539028, now seen corresponding path program 1 times [2022-11-21 16:26:53,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:26:53,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758147571] [2022-11-21 16:26:53,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:26:53,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:26:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:26:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:26:54,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:26:54,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758147571] [2022-11-21 16:26:54,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758147571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:26:54,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:26:54,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:26:54,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492353639] [2022-11-21 16:26:54,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:26:54,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:26:54,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:26:54,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:26:54,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:26:54,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 184 [2022-11-21 16:26:54,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 182 transitions, 532 flow. Second operand has 4 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 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) [2022-11-21 16:26:54,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:26:54,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 184 [2022-11-21 16:26:54,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:26:57,923 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([735] L1028-1-->L1026-2: Formula: (= v_~next~0_6 |v_thrThread2of4ForFork0_~end~0#1_7|) InVars {thrThread2of4ForFork0_~end~0#1=|v_thrThread2of4ForFork0_~end~0#1_7|} OutVars{~next~0=v_~next~0_6, thrThread2of4ForFork0_~end~0#1=|v_thrThread2of4ForFork0_~end~0#1_7|} AuxVars[] AssignedVars[~next~0][143], [189#(and (= |thrThread1of4ForFork0_~c~0#1| 0) (<= 10 ~len~0)), Black: 193#(and (not (= |thrThread1of4ForFork0___VERIFIER_assert_#in~cond#1| 0)) (= |thrThread1of4ForFork0_~c~0#1| 0) (<= 10 ~len~0)), 63#L1026-2true, Black: 195#(and (not (= |thrThread1of4ForFork0___VERIFIER_assert_~cond#1| 0)) (not (= |thrThread1of4ForFork0___VERIFIER_assert_#in~cond#1| 0)) (= |thrThread1of4ForFork0_~c~0#1| 0) (<= 10 ~len~0)), thrThread1of4ForFork0InUse, Black: 186#(= ~next~0 0), Black: 191#(not (= |thrThread1of4ForFork0___VERIFIER_assert_~cond#1| 0)), Black: 187#(and (<= (+ ~next~0 10) ~len~0) (= ~next~0 0)), thrThread2of4ForFork0InUse, Black: 184#true, Black: 188#(and (<= (+ ~next~0 10) ~len~0) (= ~next~0 0) (= |thrThread1of4ForFork0_~c~0#1| 0)), thrThread3of4ForFork0InUse, Black: 197#(and (not (= |thrThread1of4ForFork0___VERIFIER_assert_~cond#1| 0)) (not (= |thrThread1of4ForFork0___VERIFIER_assert_#in~cond#1| 0))), thrThread4of4ForFork0InUse, 208#true, 25#L1013true, Black: 181#(and (= |thrThread1of4ForFork0_~end~0#1| 0) (= |thrThread1of4ForFork0_~c~0#1| 0)), 39#L1046-4true, 128#L1026-2true, 92#L1028true]) [2022-11-21 16:26:57,924 INFO L383 tUnfolder$Statistics]: this new event has 98 ancestors and is cut-off event [2022-11-21 16:26:57,924 INFO L386 tUnfolder$Statistics]: existing Event has 98 ancestors and is cut-off event [2022-11-21 16:26:57,924 INFO L386 tUnfolder$Statistics]: existing Event has 98 ancestors and is cut-off event [2022-11-21 16:26:57,925 INFO L386 tUnfolder$Statistics]: existing Event has 98 ancestors and is cut-off event [2022-11-21 16:26:58,194 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([800] L1016-->L1019: Formula: (and (= v_~lock~0_29 0) (= |v_thrThread4of4ForFork0_assume_abort_if_not_#in~cond#1_3| |v_thrThread4of4ForFork0_assume_abort_if_not_~cond#1_3|) (= |v_thrThread4of4ForFork0_assume_abort_if_not_#in~cond#1_3| (ite (= v_~lock~0_30 1) 1 0)) (not (= 0 |v_thrThread4of4ForFork0_assume_abort_if_not_~cond#1_3|))) InVars {~lock~0=v_~lock~0_30} OutVars{thrThread4of4ForFork0_assume_abort_if_not_#in~cond#1=|v_thrThread4of4ForFork0_assume_abort_if_not_#in~cond#1_3|, ~lock~0=v_~lock~0_29, thrThread4of4ForFork0_assume_abort_if_not_~cond#1=|v_thrThread4of4ForFork0_assume_abort_if_not_~cond#1_3|} AuxVars[] AssignedVars[thrThread4of4ForFork0_assume_abort_if_not_#in~cond#1, ~lock~0, thrThread4of4ForFork0_assume_abort_if_not_~cond#1][167], [30#L1019true, 189#(and (= |thrThread1of4ForFork0_~c~0#1| 0) (<= 10 ~len~0)), Black: 193#(and (not (= |thrThread1of4ForFork0___VERIFIER_assert_#in~cond#1| 0)) (= |thrThread1of4ForFork0_~c~0#1| 0) (<= 10 ~len~0)), 3#L1028-1true, Black: 195#(and (not (= |thrThread1of4ForFork0___VERIFIER_assert_~cond#1| 0)) (not (= |thrThread1of4ForFork0___VERIFIER_assert_#in~cond#1| 0)) (= |thrThread1of4ForFork0_~c~0#1| 0) (<= 10 ~len~0)), thrThread1of4ForFork0InUse, Black: 186#(= ~next~0 0), Black: 191#(not (= |thrThread1of4ForFork0___VERIFIER_assert_~cond#1| 0)), Black: 187#(and (<= (+ ~next~0 10) ~len~0) (= ~next~0 0)), thrThread2of4ForFork0InUse, Black: 184#true, Black: 188#(and (<= (+ ~next~0 10) ~len~0) (= ~next~0 0) (= |thrThread1of4ForFork0_~c~0#1| 0)), thrThread3of4ForFork0InUse, Black: 197#(and (not (= |thrThread1of4ForFork0___VERIFIER_assert_~cond#1| 0)) (not (= |thrThread1of4ForFork0___VERIFIER_assert_#in~cond#1| 0))), thrThread4of4ForFork0InUse, 208#true, 25#L1013true, Black: 181#(and (= |thrThread1of4ForFork0_~end~0#1| 0) (= |thrThread1of4ForFork0_~c~0#1| 0)), 39#L1046-4true, 92#L1028true]) [2022-11-21 16:26:58,194 INFO L383 tUnfolder$Statistics]: this new event has 99 ancestors and is cut-off event [2022-11-21 16:26:58,195 INFO L386 tUnfolder$Statistics]: existing Event has 99 ancestors and is cut-off event [2022-11-21 16:26:58,195 INFO L386 tUnfolder$Statistics]: existing Event has 99 ancestors and is cut-off event [2022-11-21 16:26:58,195 INFO L386 tUnfolder$Statistics]: existing Event has 99 ancestors and is cut-off event [2022-11-21 16:26:58,431 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([735] L1028-1-->L1026-2: Formula: (= v_~next~0_6 |v_thrThread2of4ForFork0_~end~0#1_7|) InVars {thrThread2of4ForFork0_~end~0#1=|v_thrThread2of4ForFork0_~end~0#1_7|} OutVars{~next~0=v_~next~0_6, thrThread2of4ForFork0_~end~0#1=|v_thrThread2of4ForFork0_~end~0#1_7|} AuxVars[] AssignedVars[~next~0][143], [189#(and (= |thrThread1of4ForFork0_~c~0#1| 0) (<= 10 ~len~0)), Black: 193#(and (not (= |thrThread1of4ForFork0___VERIFIER_assert_#in~cond#1| 0)) (= |thrThread1of4ForFork0_~c~0#1| 0) (<= 10 ~len~0)), 63#L1026-2true, Black: 195#(and (not (= |thrThread1of4ForFork0___VERIFIER_assert_~cond#1| 0)) (not (= |thrThread1of4ForFork0___VERIFIER_assert_#in~cond#1| 0)) (= |thrThread1of4ForFork0_~c~0#1| 0) (<= 10 ~len~0)), 100#L1026-2true, thrThread1of4ForFork0InUse, Black: 186#(= ~next~0 0), Black: 191#(not (= |thrThread1of4ForFork0___VERIFIER_assert_~cond#1| 0)), thrThread2of4ForFork0InUse, Black: 187#(and (<= (+ ~next~0 10) ~len~0) (= ~next~0 0)), Black: 184#true, thrThread3of4ForFork0InUse, Black: 188#(and (<= (+ ~next~0 10) ~len~0) (= ~next~0 0) (= |thrThread1of4ForFork0_~c~0#1| 0)), Black: 197#(and (not (= |thrThread1of4ForFork0___VERIFIER_assert_~cond#1| 0)) (not (= |thrThread1of4ForFork0___VERIFIER_assert_#in~cond#1| 0))), thrThread4of4ForFork0InUse, 208#true, 25#L1013true, Black: 181#(and (= |thrThread1of4ForFork0_~end~0#1| 0) (= |thrThread1of4ForFork0_~c~0#1| 0)), 39#L1046-4true, 128#L1026-2true]) [2022-11-21 16:26:58,431 INFO L383 tUnfolder$Statistics]: this new event has 100 ancestors and is cut-off event [2022-11-21 16:26:58,431 INFO L386 tUnfolder$Statistics]: existing Event has 97 ancestors and is cut-off event [2022-11-21 16:26:58,431 INFO L386 tUnfolder$Statistics]: existing Event has 97 ancestors and is cut-off event [2022-11-21 16:26:58,432 INFO L386 tUnfolder$Statistics]: existing Event has 97 ancestors and is cut-off event [2022-11-21 16:27:01,225 INFO L130 PetriNetUnfolder]: 12614/46435 cut-off events. [2022-11-21 16:27:01,225 INFO L131 PetriNetUnfolder]: For 7857/10325 co-relation queries the response was YES. [2022-11-21 16:27:01,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74751 conditions, 46435 events. 12614/46435 cut-off events. For 7857/10325 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 680404 event pairs, 6048 based on Foata normal form. 77/40847 useless extension candidates. Maximal degree in co-relation 74586. Up to 8662 conditions per place. [2022-11-21 16:27:01,952 INFO L137 encePairwiseOnDemand]: 180/184 looper letters, 41 selfloop transitions, 3 changer transitions 0/200 dead transitions. [2022-11-21 16:27:01,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 200 transitions, 676 flow [2022-11-21 16:27:01,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:27:01,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 16:27:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 623 transitions. [2022-11-21 16:27:01,956 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8464673913043478 [2022-11-21 16:27:01,956 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 623 transitions. [2022-11-21 16:27:01,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 623 transitions. [2022-11-21 16:27:01,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:27:01,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 623 transitions. [2022-11-21 16:27:01,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 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) [2022-11-21 16:27:01,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 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) [2022-11-21 16:27:01,961 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 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) [2022-11-21 16:27:01,962 INFO L175 Difference]: Start difference. First operand has 182 places, 182 transitions, 532 flow. Second operand 4 states and 623 transitions. [2022-11-21 16:27:01,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 200 transitions, 676 flow [2022-11-21 16:27:02,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 200 transitions, 676 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:27:02,121 INFO L231 Difference]: Finished difference. Result has 186 places, 182 transitions, 542 flow [2022-11-21 16:27:02,122 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=542, PETRI_PLACES=186, PETRI_TRANSITIONS=182} [2022-11-21 16:27:02,123 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 11 predicate places. [2022-11-21 16:27:02,123 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 182 transitions, 542 flow [2022-11-21 16:27:02,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 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) [2022-11-21 16:27:02,124 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:27:02,124 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:27:02,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:27:02,124 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-21 16:27:02,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:02,125 INFO L85 PathProgramCache]: Analyzing trace with hash -377843776, now seen corresponding path program 1 times [2022-11-21 16:27:02,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:02,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973608990] [2022-11-21 16:27:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:02,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:27:02,156 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:27:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:27:02,196 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:27:02,198 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:27:02,198 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-21 16:27:02,198 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-21 16:27:02,198 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-21 16:27:02,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-21 16:27:02,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-21 16:27:02,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-21 16:27:02,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:27:02,200 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-21 16:27:02,201 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 16:27:02,201 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-21 16:27:02,251 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 16:27:02,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 218 transitions, 481 flow [2022-11-21 16:27:02,300 INFO L130 PetriNetUnfolder]: 27/286 cut-off events. [2022-11-21 16:27:02,301 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-21 16:27:02,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 286 events. 27/286 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 823 event pairs, 0 based on Foata normal form. 0/248 useless extension candidates. Maximal degree in co-relation 251. Up to 12 conditions per place. [2022-11-21 16:27:02,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 218 transitions, 481 flow [2022-11-21 16:27:02,307 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 218 transitions, 481 flow [2022-11-21 16:27:02,309 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:27:02,311 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9736dd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:27:02,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-21 16:27:02,322 INFO L130 PetriNetUnfolder]: 9/135 cut-off events. [2022-11-21 16:27:02,323 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-21 16:27:02,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:27:02,323 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:27:02,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-21 16:27:02,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:02,324 INFO L85 PathProgramCache]: Analyzing trace with hash -875921481, now seen corresponding path program 1 times [2022-11-21 16:27:02,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:02,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399099007] [2022-11-21 16:27:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:02,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:27:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:02,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:27:02,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399099007] [2022-11-21 16:27:02,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399099007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:27:02,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:27:02,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:27:02,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274015604] [2022-11-21 16:27:02,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:27:02,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:27:02,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:27:02,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:27:02,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:27:02,430 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 218 [2022-11-21 16:27:02,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 218 transitions, 481 flow. Second operand has 4 states, 4 states have (on average 175.25) internal successors, (701), 4 states have internal predecessors, (701), 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) [2022-11-21 16:27:02,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:27:02,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 218 [2022-11-21 16:27:02,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:27:06,791 INFO L130 PetriNetUnfolder]: 7057/25564 cut-off events. [2022-11-21 16:27:06,791 INFO L131 PetriNetUnfolder]: For 8687/8687 co-relation queries the response was YES. [2022-11-21 16:27:07,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36934 conditions, 25564 events. 7057/25564 cut-off events. For 8687/8687 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 326902 event pairs, 3628 based on Foata normal form. 6649/29522 useless extension candidates. Maximal degree in co-relation 23983. Up to 5406 conditions per place. [2022-11-21 16:27:07,229 INFO L137 encePairwiseOnDemand]: 201/218 looper letters, 50 selfloop transitions, 3 changer transitions 1/220 dead transitions. [2022-11-21 16:27:07,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 220 transitions, 655 flow [2022-11-21 16:27:07,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:27:07,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 16:27:07,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 780 transitions. [2022-11-21 16:27:07,232 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8944954128440367 [2022-11-21 16:27:07,232 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 780 transitions. [2022-11-21 16:27:07,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 780 transitions. [2022-11-21 16:27:07,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:27:07,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 780 transitions. [2022-11-21 16:27:07,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 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) [2022-11-21 16:27:07,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 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) [2022-11-21 16:27:07,237 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 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) [2022-11-21 16:27:07,237 INFO L175 Difference]: Start difference. First operand has 207 places, 218 transitions, 481 flow. Second operand 4 states and 780 transitions. [2022-11-21 16:27:07,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 220 transitions, 655 flow [2022-11-21 16:27:07,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 220 transitions, 611 flow, removed 22 selfloop flow, removed 0 redundant places. [2022-11-21 16:27:07,243 INFO L231 Difference]: Finished difference. Result has 199 places, 193 transitions, 421 flow [2022-11-21 16:27:07,243 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=421, PETRI_PLACES=199, PETRI_TRANSITIONS=193} [2022-11-21 16:27:07,244 INFO L288 CegarLoopForPetriNet]: 207 programPoint places, -8 predicate places. [2022-11-21 16:27:07,244 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 193 transitions, 421 flow [2022-11-21 16:27:07,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 175.25) internal successors, (701), 4 states have internal predecessors, (701), 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) [2022-11-21 16:27:07,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:27:07,245 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:27:07,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:27:07,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-21 16:27:07,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:07,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1385448054, now seen corresponding path program 1 times [2022-11-21 16:27:07,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:27:07,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351670327] [2022-11-21 16:27:07,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:27:07,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:27:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:27:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:27:07,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:27:07,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351670327] [2022-11-21 16:27:07,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351670327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:27:07,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:27:07,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:27:07,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541393184] [2022-11-21 16:27:07,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:27:07,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:27:07,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:27:07,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:27:07,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:27:07,494 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 218 [2022-11-21 16:27:07,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 193 transitions, 421 flow. Second operand has 8 states, 8 states have (on average 141.5) internal successors, (1132), 8 states have internal predecessors, (1132), 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) [2022-11-21 16:27:07,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:27:07,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 218 [2022-11-21 16:27:07,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand