./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/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_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/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_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/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 db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a --- 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 17:06:43,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:06:43,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:06:43,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:06:43,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:06:43,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:06:43,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:06:43,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:06:43,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:06:43,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:06:43,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:06:43,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:06:43,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:06:43,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:06:43,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:06:43,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:06:43,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:06:43,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:06:43,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:06:43,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:06:43,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:06:43,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:06:43,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:06:43,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:06:43,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:06:43,852 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:06:43,853 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:06:43,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:06:43,855 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:06:43,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:06:43,858 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:06:43,860 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:06:43,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:06:43,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:06:43,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:06:43,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:06:43,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:06:43,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:06:43,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:06:43,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:06:43,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:06:43,872 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 17:06:43,914 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:06:43,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:06:43,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:06:43,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:06:43,917 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:06:43,917 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:06:43,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:06:43,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:06:43,919 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:06:43,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:06:43,920 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 17:06:43,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 17:06:43,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 17:06:43,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:06:43,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 17:06:43,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:06:43,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 17:06:43,922 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 17:06:43,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 17:06:43,922 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:06:43,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 17:06:43,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:06:43,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:06:43,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:06:43,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:06:43,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:06:43,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:06:43,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 17:06:43,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 17:06:43,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 17:06:43,925 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 17:06:43,926 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 17:06:43,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 17:06:43,927 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_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a [2022-11-21 17:06:44,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:06:44,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:06:44,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:06:44,222 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:06:44,223 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:06:44,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2022-11-21 17:06:47,211 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:06:47,541 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:06:47,542 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2022-11-21 17:06:47,556 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/data/bf0800485/054ca33d00cb43598c83950fd50c791e/FLAGfef966152 [2022-11-21 17:06:47,571 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/data/bf0800485/054ca33d00cb43598c83950fd50c791e [2022-11-21 17:06:47,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:06:47,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:06:47,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:06:47,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:06:47,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:06:47,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:06:47" (1/1) ... [2022-11-21 17:06:47,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2121c036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:06:47, skipping insertion in model container [2022-11-21 17:06:47,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:06:47" (1/1) ... [2022-11-21 17:06:47,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:06:47,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:06:48,196 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_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2022-11-21 17:06:48,249 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:06:48,366 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 17:06:48,431 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_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2022-11-21 17:06:48,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:06:48,518 INFO L208 MainTranslator]: Completed translation [2022-11-21 17:06:48,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:06:48 WrapperNode [2022-11-21 17:06:48,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:06:48,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 17:06:48,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 17:06:48,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 17:06:48,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:06:48" (1/1) ... [2022-11-21 17:06:48,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:06:48" (1/1) ... [2022-11-21 17:06:48,586 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 227 [2022-11-21 17:06:48,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 17:06:48,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 17:06:48,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 17:06:48,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 17:06:48,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:06:48" (1/1) ... [2022-11-21 17:06:48,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:06:48" (1/1) ... [2022-11-21 17:06:48,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:06:48" (1/1) ... [2022-11-21 17:06:48,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:06:48" (1/1) ... [2022-11-21 17:06:48,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:06:48" (1/1) ... [2022-11-21 17:06:48,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:06:48" (1/1) ... [2022-11-21 17:06:48,661 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:06:48" (1/1) ... [2022-11-21 17:06:48,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:06:48" (1/1) ... [2022-11-21 17:06:48,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 17:06:48,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 17:06:48,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 17:06:48,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 17:06:48,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:06:48" (1/1) ... [2022-11-21 17:06:48,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:06:48,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:06:48,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 17:06:48,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 17:06:48,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 17:06:48,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-21 17:06:48,746 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-11-21 17:06:48,746 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-11-21 17:06:48,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 17:06:48,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 17:06:48,747 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-11-21 17:06:48,747 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-11-21 17:06:48,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 17:06:48,748 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-21 17:06:48,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 17:06:48,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 17:06:48,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-21 17:06:48,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 17:06:48,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 17:06:48,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 17:06:48,751 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 17:06:48,940 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 17:06:48,942 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 17:06:49,452 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 17:06:49,467 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 17:06:49,467 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-21 17:06:49,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:06:49 BoogieIcfgContainer [2022-11-21 17:06:49,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 17:06:49,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 17:06:49,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 17:06:49,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 17:06:49,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 05:06:47" (1/3) ... [2022-11-21 17:06:49,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f48534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:06:49, skipping insertion in model container [2022-11-21 17:06:49,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:06:48" (2/3) ... [2022-11-21 17:06:49,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f48534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:06:49, skipping insertion in model container [2022-11-21 17:06:49,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:06:49" (3/3) ... [2022-11-21 17:06:49,512 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2022-11-21 17:06:49,521 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 17:06:49,532 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 17:06:49,533 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 17:06:49,533 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 17:06:49,668 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-21 17:06:49,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 241 transitions, 504 flow [2022-11-21 17:06:49,941 INFO L130 PetriNetUnfolder]: 54/446 cut-off events. [2022-11-21 17:06:49,942 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-21 17:06:49,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 446 events. 54/446 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1748 event pairs, 0 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 229. Up to 8 conditions per place. [2022-11-21 17:06:49,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 241 transitions, 504 flow [2022-11-21 17:06:49,969 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 221 places, 239 transitions, 494 flow [2022-11-21 17:06:49,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:06:49,986 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;@372c930a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:06:49,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-21 17:06:50,010 INFO L130 PetriNetUnfolder]: 10/130 cut-off events. [2022-11-21 17:06:50,011 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 17:06:50,011 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:06:50,012 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] [2022-11-21 17:06:50,012 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 17:06:50,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:50,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1325719117, now seen corresponding path program 1 times [2022-11-21 17:06:50,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:50,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616177393] [2022-11-21 17:06:50,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:50,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:50,364 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 17:06:50,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:50,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616177393] [2022-11-21 17:06:50,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616177393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:06:50,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:06:50,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:06:50,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609848397] [2022-11-21 17:06:50,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:06:50,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 17:06:50,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:50,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 17:06:50,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 17:06:50,438 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 241 [2022-11-21 17:06:50,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 239 transitions, 494 flow. Second operand has 2 states, 2 states have (on average 218.0) internal successors, (436), 2 states have internal predecessors, (436), 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 17:06:50,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:06:50,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 241 [2022-11-21 17:06:50,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:06:50,572 INFO L130 PetriNetUnfolder]: 11/393 cut-off events. [2022-11-21 17:06:50,572 INFO L131 PetriNetUnfolder]: For 19/29 co-relation queries the response was YES. [2022-11-21 17:06:50,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 393 events. 11/393 cut-off events. For 19/29 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1458 event pairs, 0 based on Foata normal form. 50/418 useless extension candidates. Maximal degree in co-relation 197. Up to 8 conditions per place. [2022-11-21 17:06:50,582 INFO L137 encePairwiseOnDemand]: 224/241 looper letters, 4 selfloop transitions, 0 changer transitions 0/221 dead transitions. [2022-11-21 17:06:50,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 221 transitions, 466 flow [2022-11-21 17:06:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 17:06:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 17:06:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 455 transitions. [2022-11-21 17:06:50,603 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9439834024896265 [2022-11-21 17:06:50,604 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 455 transitions. [2022-11-21 17:06:50,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 455 transitions. [2022-11-21 17:06:50,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:06:50,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 455 transitions. [2022-11-21 17:06:50,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 227.5) internal successors, (455), 2 states have internal predecessors, (455), 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 17:06:50,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 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 17:06:50,625 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 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 17:06:50,627 INFO L175 Difference]: Start difference. First operand has 221 places, 239 transitions, 494 flow. Second operand 2 states and 455 transitions. [2022-11-21 17:06:50,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 221 transitions, 466 flow [2022-11-21 17:06:50,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 221 transitions, 466 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 17:06:50,639 INFO L231 Difference]: Finished difference. Result has 221 places, 221 transitions, 458 flow [2022-11-21 17:06:50,642 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=458, PETRI_PLACES=221, PETRI_TRANSITIONS=221} [2022-11-21 17:06:50,646 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 0 predicate places. [2022-11-21 17:06:50,646 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 221 transitions, 458 flow [2022-11-21 17:06:50,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 218.0) internal successors, (436), 2 states have internal predecessors, (436), 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 17:06:50,647 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:06:50,648 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] [2022-11-21 17:06:50,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 17:06:50,648 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 17:06:50,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:50,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1972175826, now seen corresponding path program 1 times [2022-11-21 17:06:50,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:50,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790784040] [2022-11-21 17:06:50,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:50,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:50,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:50,876 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 17:06:50,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:50,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790784040] [2022-11-21 17:06:50,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790784040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:06:50,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:06:50,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:06:50,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067879680] [2022-11-21 17:06:50,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:06:50,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:06:50,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:50,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:06:50,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:06:50,890 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 241 [2022-11-21 17:06:50,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 221 transitions, 458 flow. Second operand has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 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 17:06:50,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:06:50,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 241 [2022-11-21 17:06:50,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:06:51,057 INFO L130 PetriNetUnfolder]: 11/408 cut-off events. [2022-11-21 17:06:51,057 INFO L131 PetriNetUnfolder]: For 19/29 co-relation queries the response was YES. [2022-11-21 17:06:51,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 408 events. 11/408 cut-off events. For 19/29 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1455 event pairs, 0 based on Foata normal form. 0/383 useless extension candidates. Maximal degree in co-relation 441. Up to 16 conditions per place. [2022-11-21 17:06:51,061 INFO L137 encePairwiseOnDemand]: 238/241 looper letters, 15 selfloop transitions, 2 changer transitions 0/226 dead transitions. [2022-11-21 17:06:51,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 226 transitions, 502 flow [2022-11-21 17:06:51,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:06:51,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 17:06:51,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2022-11-21 17:06:51,064 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8921161825726142 [2022-11-21 17:06:51,064 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2022-11-21 17:06:51,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2022-11-21 17:06:51,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:06:51,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2022-11-21 17:06:51,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 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 17:06:51,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 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 17:06:51,071 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 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 17:06:51,071 INFO L175 Difference]: Start difference. First operand has 221 places, 221 transitions, 458 flow. Second operand 3 states and 645 transitions. [2022-11-21 17:06:51,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 226 transitions, 502 flow [2022-11-21 17:06:51,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 226 transitions, 502 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 17:06:51,082 INFO L231 Difference]: Finished difference. Result has 224 places, 222 transitions, 470 flow [2022-11-21 17:06:51,082 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=470, PETRI_PLACES=224, PETRI_TRANSITIONS=222} [2022-11-21 17:06:51,083 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 3 predicate places. [2022-11-21 17:06:51,084 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 222 transitions, 470 flow [2022-11-21 17:06:51,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 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 17:06:51,084 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:06:51,085 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, 1, 1, 1, 1, 1] [2022-11-21 17:06:51,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 17:06:51,085 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 17:06:51,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:51,088 INFO L85 PathProgramCache]: Analyzing trace with hash -56279307, now seen corresponding path program 1 times [2022-11-21 17:06:51,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:51,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892368535] [2022-11-21 17:06:51,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:51,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 17:06:51,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:51,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892368535] [2022-11-21 17:06:51,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892368535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:06:51,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903209093] [2022-11-21 17:06:51,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:51,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:06:51,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:06:51,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:06:51,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 17:06:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:51,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 17:06:51,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:06:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 17:06:51,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:06:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 17:06:51,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903209093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:06:51,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:06:51,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 17:06:51,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811761488] [2022-11-21 17:06:51,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:06:51,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 17:06:51,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:51,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 17:06:51,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 17:06:51,691 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 241 [2022-11-21 17:06:51,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 222 transitions, 470 flow. Second operand has 10 states, 10 states have (on average 210.4) internal successors, (2104), 10 states have internal predecessors, (2104), 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 17:06:51,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:06:51,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 241 [2022-11-21 17:06:51,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:06:51,909 INFO L130 PetriNetUnfolder]: 11/426 cut-off events. [2022-11-21 17:06:51,910 INFO L131 PetriNetUnfolder]: For 20/30 co-relation queries the response was YES. [2022-11-21 17:06:51,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 426 events. 11/426 cut-off events. For 20/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1382 event pairs, 0 based on Foata normal form. 2/404 useless extension candidates. Maximal degree in co-relation 474. Up to 12 conditions per place. [2022-11-21 17:06:51,914 INFO L137 encePairwiseOnDemand]: 235/241 looper letters, 17 selfloop transitions, 9 changer transitions 0/234 dead transitions. [2022-11-21 17:06:51,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 234 transitions, 548 flow [2022-11-21 17:06:51,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 17:06:51,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 17:06:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1900 transitions. [2022-11-21 17:06:51,919 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.875979714153988 [2022-11-21 17:06:51,919 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1900 transitions. [2022-11-21 17:06:51,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1900 transitions. [2022-11-21 17:06:51,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:06:51,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1900 transitions. [2022-11-21 17:06:51,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 211.11111111111111) internal successors, (1900), 9 states have internal predecessors, (1900), 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 17:06:51,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 241.0) internal successors, (2410), 10 states have internal predecessors, (2410), 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 17:06:51,931 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 241.0) internal successors, (2410), 10 states have internal predecessors, (2410), 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 17:06:51,932 INFO L175 Difference]: Start difference. First operand has 224 places, 222 transitions, 470 flow. Second operand 9 states and 1900 transitions. [2022-11-21 17:06:51,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 234 transitions, 548 flow [2022-11-21 17:06:51,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 234 transitions, 546 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 17:06:51,937 INFO L231 Difference]: Finished difference. Result has 234 places, 228 transitions, 518 flow [2022-11-21 17:06:51,938 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=518, PETRI_PLACES=234, PETRI_TRANSITIONS=228} [2022-11-21 17:06:51,939 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 13 predicate places. [2022-11-21 17:06:51,939 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 228 transitions, 518 flow [2022-11-21 17:06:51,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 210.4) internal successors, (2104), 10 states have internal predecessors, (2104), 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 17:06:51,940 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:06:51,941 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-21 17:06:51,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 17:06:52,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:06:52,147 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 17:06:52,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:52,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1794391237, now seen corresponding path program 2 times [2022-11-21 17:06:52,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:52,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3513940] [2022-11-21 17:06:52,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:52,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 17:06:52,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:52,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3513940] [2022-11-21 17:06:52,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3513940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:06:52,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109012878] [2022-11-21 17:06:52,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:06:52,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:06:52,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:06:52,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:06:52,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 17:06:52,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:06:52,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:06:52,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 17:06:52,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:06:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 17:06:52,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:06:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 17:06:53,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109012878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:06:53,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:06:53,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-21 17:06:53,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505678047] [2022-11-21 17:06:53,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:06:53,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 17:06:53,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:53,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 17:06:53,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-21 17:06:53,022 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 241 [2022-11-21 17:06:53,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 228 transitions, 518 flow. Second operand has 18 states, 18 states have (on average 210.66666666666666) internal successors, (3792), 18 states have internal predecessors, (3792), 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 17:06:53,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:06:53,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 241 [2022-11-21 17:06:53,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:06:53,435 INFO L130 PetriNetUnfolder]: 11/490 cut-off events. [2022-11-21 17:06:53,436 INFO L131 PetriNetUnfolder]: For 40/50 co-relation queries the response was YES. [2022-11-21 17:06:53,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 490 events. 11/490 cut-off events. For 40/50 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1379 event pairs, 0 based on Foata normal form. 4/470 useless extension candidates. Maximal degree in co-relation 609. Up to 12 conditions per place. [2022-11-21 17:06:53,440 INFO L137 encePairwiseOnDemand]: 235/241 looper letters, 29 selfloop transitions, 21 changer transitions 0/258 dead transitions. [2022-11-21 17:06:53,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 258 transitions, 738 flow [2022-11-21 17:06:53,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 17:06:53,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-21 17:06:53,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4422 transitions. [2022-11-21 17:06:53,449 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8737403675163011 [2022-11-21 17:06:53,450 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4422 transitions. [2022-11-21 17:06:53,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4422 transitions. [2022-11-21 17:06:53,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:06:53,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4422 transitions. [2022-11-21 17:06:53,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 210.57142857142858) internal successors, (4422), 21 states have internal predecessors, (4422), 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 17:06:53,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 241.0) internal successors, (5302), 22 states have internal predecessors, (5302), 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 17:06:53,473 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 241.0) internal successors, (5302), 22 states have internal predecessors, (5302), 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 17:06:53,474 INFO L175 Difference]: Start difference. First operand has 234 places, 228 transitions, 518 flow. Second operand 21 states and 4422 transitions. [2022-11-21 17:06:53,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 258 transitions, 738 flow [2022-11-21 17:06:53,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 258 transitions, 724 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-21 17:06:53,481 INFO L231 Difference]: Finished difference. Result has 258 places, 241 transitions, 642 flow [2022-11-21 17:06:53,481 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=642, PETRI_PLACES=258, PETRI_TRANSITIONS=241} [2022-11-21 17:06:53,482 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 37 predicate places. [2022-11-21 17:06:53,482 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 241 transitions, 642 flow [2022-11-21 17:06:53,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 210.66666666666666) internal successors, (3792), 18 states have internal predecessors, (3792), 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 17:06:53,485 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:06:53,485 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2022-11-21 17:06:53,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 17:06:53,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:06:53,692 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 17:06:53,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:53,693 INFO L85 PathProgramCache]: Analyzing trace with hash 536937415, now seen corresponding path program 3 times [2022-11-21 17:06:53,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:53,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230175424] [2022-11-21 17:06:53,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:53,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 17:06:54,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:54,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230175424] [2022-11-21 17:06:54,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230175424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:06:54,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852790237] [2022-11-21 17:06:54,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:06:54,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:06:54,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:06:54,435 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:06:54,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338a68ac-7a48-40d3-a0a5-26fe9e64b41d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process