./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro --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 bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f --- 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-8393723 [2022-11-18 20:13:08,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:13:08,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:13:08,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:13:08,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:13:08,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:13:08,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:13:08,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:13:08,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:13:08,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:13:08,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:13:08,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:13:08,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:13:08,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:13:08,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:13:08,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:13:08,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:13:08,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:13:08,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:13:08,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:13:08,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:13:08,910 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:13:08,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:13:08,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:13:08,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:13:08,917 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:13:08,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:13:08,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:13:08,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:13:08,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:13:08,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:13:08,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:13:08,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:13:08,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:13:08,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:13:08,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:13:08,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:13:08,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:13:08,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:13:08,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:13:08,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:13:08,930 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:13:08,952 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:13:08,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:13:08,953 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:13:08,953 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:13:08,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:13:08,954 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:13:08,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:13:08,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:13:08,956 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:13:08,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:13:08,957 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:13:08,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:13:08,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:13:08,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:13:08,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:13:08,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:13:08,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:13:08,959 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:13:08,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:13:08,960 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:13:08,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:13:08,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:13:08,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:13:08,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:13:08,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:13:08,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:13:08,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:13:08,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:13:08,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:13:08,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:13:08,963 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:13:08,964 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:13:08,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:13:08,964 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_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f [2022-11-18 20:13:09,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:13:09,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:13:09,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:13:09,281 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:13:09,281 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:13:09,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i [2022-11-18 20:13:09,366 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/data/6d7288859/e1947f4d9dee42179ff3a903dae09c5a/FLAGcc9555ad0 [2022-11-18 20:13:09,896 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:13:09,896 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i [2022-11-18 20:13:09,913 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/data/6d7288859/e1947f4d9dee42179ff3a903dae09c5a/FLAGcc9555ad0 [2022-11-18 20:13:10,191 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/data/6d7288859/e1947f4d9dee42179ff3a903dae09c5a [2022-11-18 20:13:10,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:13:10,197 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:13:10,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:13:10,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:13:10,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:13:10,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:13:10" (1/1) ... [2022-11-18 20:13:10,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ed5e834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:10, skipping insertion in model container [2022-11-18 20:13:10,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:13:10" (1/1) ... [2022-11-18 20:13:10,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:13:10,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:13:10,844 WARN L234 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_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i[41323,41336] [2022-11-18 20:13:10,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:13:10,903 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:13:10,945 WARN L234 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_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i[41323,41336] [2022-11-18 20:13:10,956 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:13:11,031 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:13:11,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:11 WrapperNode [2022-11-18 20:13:11,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:13:11,033 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:13:11,033 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:13:11,033 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:13:11,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:11" (1/1) ... [2022-11-18 20:13:11,071 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:11" (1/1) ... [2022-11-18 20:13:11,127 INFO L138 Inliner]: procedures = 271, calls = 40, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 244 [2022-11-18 20:13:11,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:13:11,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:13:11,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:13:11,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:13:11,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:11" (1/1) ... [2022-11-18 20:13:11,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:11" (1/1) ... [2022-11-18 20:13:11,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:11" (1/1) ... [2022-11-18 20:13:11,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:11" (1/1) ... [2022-11-18 20:13:11,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:11" (1/1) ... [2022-11-18 20:13:11,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:11" (1/1) ... [2022-11-18 20:13:11,190 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:11" (1/1) ... [2022-11-18 20:13:11,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:11" (1/1) ... [2022-11-18 20:13:11,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:13:11,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:13:11,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:13:11,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:13:11,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:11" (1/1) ... [2022-11-18 20:13:11,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:13:11,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:11,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:13:11,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:13:11,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:13:11,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:13:11,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:13:11,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:13:11,280 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 20:13:11,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:13:11,280 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-18 20:13:11,280 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-18 20:13:11,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:13:11,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:13:11,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:13:11,283 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:13:11,451 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:13:11,453 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:13:11,899 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:13:11,909 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:13:11,910 INFO L300 CfgBuilder]: Removed 35 assume(true) statements. [2022-11-18 20:13:11,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:13:11 BoogieIcfgContainer [2022-11-18 20:13:11,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:13:11,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:13:11,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:13:11,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:13:11,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:13:10" (1/3) ... [2022-11-18 20:13:11,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35aed187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:13:11, skipping insertion in model container [2022-11-18 20:13:11,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:11" (2/3) ... [2022-11-18 20:13:11,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35aed187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:13:11, skipping insertion in model container [2022-11-18 20:13:11,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:13:11" (3/3) ... [2022-11-18 20:13:11,932 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_71-funloop_racing.i [2022-11-18 20:13:11,950 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:13:11,961 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:13:11,961 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-18 20:13:11,961 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:13:12,078 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-18 20:13:12,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 252 transitions, 512 flow [2022-11-18 20:13:12,280 INFO L130 PetriNetUnfolder]: 73/388 cut-off events. [2022-11-18 20:13:12,281 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:13:12,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 388 events. 73/388 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1722 event pairs, 0 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 212. Up to 8 conditions per place. [2022-11-18 20:13:12,293 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 252 transitions, 512 flow [2022-11-18 20:13:12,308 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 247 transitions, 499 flow [2022-11-18 20:13:12,332 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:13:12,344 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;@645bc82f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:13:12,345 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-18 20:13:12,391 INFO L130 PetriNetUnfolder]: 22/164 cut-off events. [2022-11-18 20:13:12,392 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:13:12,392 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:12,394 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] [2022-11-18 20:13:12,394 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:13:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:12,402 INFO L85 PathProgramCache]: Analyzing trace with hash 257846283, now seen corresponding path program 1 times [2022-11-18 20:13:12,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:12,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715045337] [2022-11-18 20:13:12,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:12,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:12,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:12,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715045337] [2022-11-18 20:13:12,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715045337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:12,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:13:12,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:13:12,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823449490] [2022-11-18 20:13:12,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:12,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:13:12,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:12,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:13:12,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:13:12,754 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 252 [2022-11-18 20:13:12,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 247 transitions, 499 flow. Second operand has 2 states, 2 states have (on average 210.5) internal successors, (421), 2 states have internal predecessors, (421), 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) [2022-11-18 20:13:12,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:13:12,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 252 [2022-11-18 20:13:12,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:13:12,844 INFO L130 PetriNetUnfolder]: 9/315 cut-off events. [2022-11-18 20:13:12,844 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:13:12,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 315 events. 9/315 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1382 event pairs, 0 based on Foata normal form. 63/360 useless extension candidates. Maximal degree in co-relation 174. Up to 4 conditions per place. [2022-11-18 20:13:12,853 INFO L137 encePairwiseOnDemand]: 214/252 looper letters, 1 selfloop transitions, 0 changer transitions 0/206 dead transitions. [2022-11-18 20:13:12,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 206 transitions, 419 flow [2022-11-18 20:13:12,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:13:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:13:12,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 457 transitions. [2022-11-18 20:13:12,875 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9067460317460317 [2022-11-18 20:13:12,876 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 457 transitions. [2022-11-18 20:13:12,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 457 transitions. [2022-11-18 20:13:12,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:13:12,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 457 transitions. [2022-11-18 20:13:12,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 228.5) internal successors, (457), 2 states have internal predecessors, (457), 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) [2022-11-18 20:13:12,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 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) [2022-11-18 20:13:12,905 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 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) [2022-11-18 20:13:12,907 INFO L175 Difference]: Start difference. First operand has 206 places, 247 transitions, 499 flow. Second operand 2 states and 457 transitions. [2022-11-18 20:13:12,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 206 transitions, 419 flow [2022-11-18 20:13:12,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 206 transitions, 419 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:13:12,921 INFO L231 Difference]: Finished difference. Result has 204 places, 206 transitions, 417 flow [2022-11-18 20:13:12,923 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=417, PETRI_PLACES=204, PETRI_TRANSITIONS=206} [2022-11-18 20:13:12,928 INFO L288 CegarLoopForPetriNet]: 206 programPoint places, -2 predicate places. [2022-11-18 20:13:12,929 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 206 transitions, 417 flow [2022-11-18 20:13:12,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 210.5) internal successors, (421), 2 states have internal predecessors, (421), 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) [2022-11-18 20:13:12,930 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:12,930 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] [2022-11-18 20:13:12,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:13:12,931 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:13:12,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:12,932 INFO L85 PathProgramCache]: Analyzing trace with hash 627523214, now seen corresponding path program 1 times [2022-11-18 20:13:12,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:12,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646405352] [2022-11-18 20:13:12,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:12,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:13,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:13,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646405352] [2022-11-18 20:13:13,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646405352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:13,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:13:13,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:13:13,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718428222] [2022-11-18 20:13:13,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:13,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:13:13,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:13,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:13:13,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:13:13,166 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 252 [2022-11-18 20:13:13,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 206 transitions, 417 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 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) [2022-11-18 20:13:13,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:13:13,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 252 [2022-11-18 20:13:13,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:13:13,259 INFO L130 PetriNetUnfolder]: 9/319 cut-off events. [2022-11-18 20:13:13,259 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:13:13,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 319 events. 9/319 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1375 event pairs, 0 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 334. Up to 9 conditions per place. [2022-11-18 20:13:13,268 INFO L137 encePairwiseOnDemand]: 249/252 looper letters, 10 selfloop transitions, 2 changer transitions 0/210 dead transitions. [2022-11-18 20:13:13,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 210 transitions, 449 flow [2022-11-18 20:13:13,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:13:13,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:13:13,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2022-11-18 20:13:13,274 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8187830687830688 [2022-11-18 20:13:13,274 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2022-11-18 20:13:13,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2022-11-18 20:13:13,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:13:13,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2022-11-18 20:13:13,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 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) [2022-11-18 20:13:13,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 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) [2022-11-18 20:13:13,283 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 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) [2022-11-18 20:13:13,284 INFO L175 Difference]: Start difference. First operand has 204 places, 206 transitions, 417 flow. Second operand 3 states and 619 transitions. [2022-11-18 20:13:13,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 210 transitions, 449 flow [2022-11-18 20:13:13,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 210 transitions, 449 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:13:13,296 INFO L231 Difference]: Finished difference. Result has 207 places, 207 transitions, 429 flow [2022-11-18 20:13:13,296 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=429, PETRI_PLACES=207, PETRI_TRANSITIONS=207} [2022-11-18 20:13:13,297 INFO L288 CegarLoopForPetriNet]: 206 programPoint places, 1 predicate places. [2022-11-18 20:13:13,297 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 207 transitions, 429 flow [2022-11-18 20:13:13,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 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) [2022-11-18 20:13:13,299 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:13,300 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] [2022-11-18 20:13:13,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:13:13,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:13:13,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:13,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1115133672, now seen corresponding path program 1 times [2022-11-18 20:13:13,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:13,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709274466] [2022-11-18 20:13:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:13,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:13:13,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:13,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709274466] [2022-11-18 20:13:13,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709274466] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:13,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489215327] [2022-11-18 20:13:13,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:13,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:13,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:13,591 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:13,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:13:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:13,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:13:13,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:13:13,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:13:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:13:13,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489215327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:13:13,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:13:13,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 20:13:13,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927509704] [2022-11-18 20:13:13,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:13:13,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:13:13,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:13,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:13:13,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:13:13,880 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 252 [2022-11-18 20:13:13,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 207 transitions, 429 flow. Second operand has 10 states, 10 states have (on average 203.1) internal successors, (2031), 10 states have internal predecessors, (2031), 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) [2022-11-18 20:13:13,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:13:13,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 252 [2022-11-18 20:13:13,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:13:14,037 INFO L130 PetriNetUnfolder]: 9/326 cut-off events. [2022-11-18 20:13:14,039 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:13:14,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 326 events. 9/326 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1368 event pairs, 0 based on Foata normal form. 2/311 useless extension candidates. Maximal degree in co-relation 355. Up to 6 conditions per place. [2022-11-18 20:13:14,042 INFO L137 encePairwiseOnDemand]: 246/252 looper letters, 11 selfloop transitions, 9 changer transitions 0/217 dead transitions. [2022-11-18 20:13:14,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 217 transitions, 491 flow [2022-11-18 20:13:14,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:13:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:13:14,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1831 transitions. [2022-11-18 20:13:14,048 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8073192239858906 [2022-11-18 20:13:14,049 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1831 transitions. [2022-11-18 20:13:14,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1831 transitions. [2022-11-18 20:13:14,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:13:14,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1831 transitions. [2022-11-18 20:13:14,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 203.44444444444446) internal successors, (1831), 9 states have internal predecessors, (1831), 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) [2022-11-18 20:13:14,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 252.0) internal successors, (2520), 10 states have internal predecessors, (2520), 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) [2022-11-18 20:13:14,062 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 252.0) internal successors, (2520), 10 states have internal predecessors, (2520), 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) [2022-11-18 20:13:14,063 INFO L175 Difference]: Start difference. First operand has 207 places, 207 transitions, 429 flow. Second operand 9 states and 1831 transitions. [2022-11-18 20:13:14,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 217 transitions, 491 flow [2022-11-18 20:13:14,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 217 transitions, 489 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:13:14,068 INFO L231 Difference]: Finished difference. Result has 217 places, 213 transitions, 477 flow [2022-11-18 20:13:14,069 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=477, PETRI_PLACES=217, PETRI_TRANSITIONS=213} [2022-11-18 20:13:14,071 INFO L288 CegarLoopForPetriNet]: 206 programPoint places, 11 predicate places. [2022-11-18 20:13:14,072 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 213 transitions, 477 flow [2022-11-18 20:13:14,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 203.1) internal successors, (2031), 10 states have internal predecessors, (2031), 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) [2022-11-18 20:13:14,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:14,074 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-18 20:13:14,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 20:13:14,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:14,281 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:13:14,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:14,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1781192312, now seen corresponding path program 2 times [2022-11-18 20:13:14,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:14,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608244029] [2022-11-18 20:13:14,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:14,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:13:14,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:14,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608244029] [2022-11-18 20:13:14,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608244029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:14,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481926119] [2022-11-18 20:13:14,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:13:14,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:14,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:14,506 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:14,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:13:14,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:13:14,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:13:14,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:13:14,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:13:14,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:13:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:13:14,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481926119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:13:14,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:13:14,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 20:13:14,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431954027] [2022-11-18 20:13:14,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:13:14,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:13:14,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:14,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:13:14,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:13:14,787 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 252 [2022-11-18 20:13:14,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 213 transitions, 477 flow. Second operand has 18 states, 18 states have (on average 203.27777777777777) internal successors, (3659), 18 states have internal predecessors, (3659), 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) [2022-11-18 20:13:14,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:13:14,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 252 [2022-11-18 20:13:14,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:13:15,084 INFO L130 PetriNetUnfolder]: 9/346 cut-off events. [2022-11-18 20:13:15,084 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-18 20:13:15,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 346 events. 9/346 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1368 event pairs, 0 based on Foata normal form. 4/333 useless extension candidates. Maximal degree in co-relation 442. Up to 11 conditions per place. [2022-11-18 20:13:15,087 INFO L137 encePairwiseOnDemand]: 246/252 looper letters, 19 selfloop transitions, 21 changer transitions 0/237 dead transitions. [2022-11-18 20:13:15,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 237 transitions, 665 flow [2022-11-18 20:13:15,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:13:15,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 20:13:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4265 transitions. [2022-11-18 20:13:15,100 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8059334845049131 [2022-11-18 20:13:15,100 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4265 transitions. [2022-11-18 20:13:15,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4265 transitions. [2022-11-18 20:13:15,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:13:15,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4265 transitions. [2022-11-18 20:13:15,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 203.0952380952381) internal successors, (4265), 21 states have internal predecessors, (4265), 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) [2022-11-18 20:13:15,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 252.0) internal successors, (5544), 22 states have internal predecessors, (5544), 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) [2022-11-18 20:13:15,131 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 252.0) internal successors, (5544), 22 states have internal predecessors, (5544), 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) [2022-11-18 20:13:15,132 INFO L175 Difference]: Start difference. First operand has 217 places, 213 transitions, 477 flow. Second operand 21 states and 4265 transitions. [2022-11-18 20:13:15,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 237 transitions, 665 flow [2022-11-18 20:13:15,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 237 transitions, 651 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 20:13:15,139 INFO L231 Difference]: Finished difference. Result has 241 places, 226 transitions, 601 flow [2022-11-18 20:13:15,140 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=601, PETRI_PLACES=241, PETRI_TRANSITIONS=226} [2022-11-18 20:13:15,141 INFO L288 CegarLoopForPetriNet]: 206 programPoint places, 35 predicate places. [2022-11-18 20:13:15,141 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 226 transitions, 601 flow [2022-11-18 20:13:15,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 203.27777777777777) internal successors, (3659), 18 states have internal predecessors, (3659), 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) [2022-11-18 20:13:15,143 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:15,143 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-18 20:13:15,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:13:15,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:15,349 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:13:15,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:15,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1269958968, now seen corresponding path program 3 times [2022-11-18 20:13:15,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:15,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677214098] [2022-11-18 20:13:15,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:15,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:13:15,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:15,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677214098] [2022-11-18 20:13:15,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677214098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:15,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888093340] [2022-11-18 20:13:15,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:13:15,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:15,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:15,731 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:15,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:13:15,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-18 20:13:15,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:13:15,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:13:15,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:13:16,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:13:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:13:16,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888093340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:13:16,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:13:16,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-18 20:13:16,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972827609] [2022-11-18 20:13:16,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:13:16,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:13:16,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:16,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:13:16,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:13:16,280 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 252 [2022-11-18 20:13:16,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 226 transitions, 601 flow. Second operand has 23 states, 23 states have (on average 203.43478260869566) internal successors, (4679), 23 states have internal predecessors, (4679), 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) [2022-11-18 20:13:16,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:13:16,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 252 [2022-11-18 20:13:16,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:13:16,699 INFO L130 PetriNetUnfolder]: 9/361 cut-off events. [2022-11-18 20:13:16,699 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-18 20:13:16,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551 conditions, 361 events. 9/361 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1369 event pairs, 0 based on Foata normal form. 3/347 useless extension candidates. Maximal degree in co-relation 538. Up to 17 conditions per place. [2022-11-18 20:13:16,702 INFO L137 encePairwiseOnDemand]: 246/252 looper letters, 25 selfloop transitions, 30 changer transitions 0/252 dead transitions. [2022-11-18 20:13:16,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 252 transitions, 857 flow [2022-11-18 20:13:16,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 20:13:16,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-18 20:13:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6088 transitions. [2022-11-18 20:13:16,716 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8052910052910053 [2022-11-18 20:13:16,716 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6088 transitions. [2022-11-18 20:13:16,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6088 transitions. [2022-11-18 20:13:16,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:13:16,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6088 transitions. [2022-11-18 20:13:16,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 202.93333333333334) internal successors, (6088), 30 states have internal predecessors, (6088), 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) [2022-11-18 20:13:16,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 252.0) internal successors, (7812), 31 states have internal predecessors, (7812), 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) [2022-11-18 20:13:16,787 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 252.0) internal successors, (7812), 31 states have internal predecessors, (7812), 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) [2022-11-18 20:13:16,788 INFO L175 Difference]: Start difference. First operand has 241 places, 226 transitions, 601 flow. Second operand 30 states and 6088 transitions. [2022-11-18 20:13:16,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 252 transitions, 857 flow [2022-11-18 20:13:16,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 252 transitions, 827 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-18 20:13:16,795 INFO L231 Difference]: Finished difference. Result has 268 places, 236 transitions, 729 flow [2022-11-18 20:13:16,796 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=729, PETRI_PLACES=268, PETRI_TRANSITIONS=236} [2022-11-18 20:13:16,797 INFO L288 CegarLoopForPetriNet]: 206 programPoint places, 62 predicate places. [2022-11-18 20:13:16,797 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 236 transitions, 729 flow [2022-11-18 20:13:16,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 203.43478260869566) internal successors, (4679), 23 states have internal predecessors, (4679), 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) [2022-11-18 20:13:16,799 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:16,799 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2022-11-18 20:13:16,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:13:17,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:17,006 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:13:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:17,007 INFO L85 PathProgramCache]: Analyzing trace with hash 211838983, now seen corresponding path program 4 times [2022-11-18 20:13:17,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:17,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450368308] [2022-11-18 20:13:17,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:17,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:13:17,051 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:13:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:13:17,110 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:13:17,110 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:13:17,112 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-18 20:13:17,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-18 20:13:17,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-18 20:13:17,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-18 20:13:17,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-18 20:13:17,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:13:17,115 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-11-18 20:13:17,117 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:13:17,118 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-18 20:13:17,176 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 20:13:17,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 325 transitions, 668 flow [2022-11-18 20:13:17,270 INFO L130 PetriNetUnfolder]: 118/622 cut-off events. [2022-11-18 20:13:17,270 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-18 20:13:17,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 622 events. 118/622 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3168 event pairs, 0 based on Foata normal form. 0/492 useless extension candidates. Maximal degree in co-relation 390. Up to 12 conditions per place. [2022-11-18 20:13:17,278 INFO L82 GeneralOperation]: Start removeDead. Operand has 270 places, 325 transitions, 668 flow [2022-11-18 20:13:17,287 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 325 transitions, 668 flow [2022-11-18 20:13:17,289 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:13:17,291 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;@645bc82f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:13:17,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-18 20:13:17,304 INFO L130 PetriNetUnfolder]: 22/164 cut-off events. [2022-11-18 20:13:17,304 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:13:17,304 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:17,305 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] [2022-11-18 20:13:17,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-18 20:13:17,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:17,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1739722453, now seen corresponding path program 1 times [2022-11-18 20:13:17,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:17,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562514927] [2022-11-18 20:13:17,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:17,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:17,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:17,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562514927] [2022-11-18 20:13:17,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562514927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:17,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:13:17,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:13:17,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096838794] [2022-11-18 20:13:17,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:17,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:13:17,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:17,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:13:17,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:13:17,351 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 325 [2022-11-18 20:13:17,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 325 transitions, 668 flow. Second operand has 2 states, 2 states have (on average 268.5) internal successors, (537), 2 states have internal predecessors, (537), 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) [2022-11-18 20:13:17,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:13:17,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 325 [2022-11-18 20:13:17,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:13:17,459 INFO L130 PetriNetUnfolder]: 17/513 cut-off events. [2022-11-18 20:13:17,459 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-18 20:13:17,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 513 events. 17/513 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2696 event pairs, 0 based on Foata normal form. 126/610 useless extension candidates. Maximal degree in co-relation 324. Up to 7 conditions per place. [2022-11-18 20:13:17,466 INFO L137 encePairwiseOnDemand]: 275/325 looper letters, 4 selfloop transitions, 0 changer transitions 0/271 dead transitions. [2022-11-18 20:13:17,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 271 transitions, 568 flow [2022-11-18 20:13:17,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:13:17,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:13:17,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 588 transitions. [2022-11-18 20:13:17,469 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9046153846153846 [2022-11-18 20:13:17,469 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 588 transitions. [2022-11-18 20:13:17,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 588 transitions. [2022-11-18 20:13:17,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:13:17,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 588 transitions. [2022-11-18 20:13:17,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 294.0) internal successors, (588), 2 states have internal predecessors, (588), 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) [2022-11-18 20:13:17,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 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) [2022-11-18 20:13:17,473 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 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) [2022-11-18 20:13:17,474 INFO L175 Difference]: Start difference. First operand has 270 places, 325 transitions, 668 flow. Second operand 2 states and 588 transitions. [2022-11-18 20:13:17,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 271 transitions, 568 flow [2022-11-18 20:13:17,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 271 transitions, 568 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:13:17,479 INFO L231 Difference]: Finished difference. Result has 267 places, 271 transitions, 560 flow [2022-11-18 20:13:17,479 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=560, PETRI_PLACES=267, PETRI_TRANSITIONS=271} [2022-11-18 20:13:17,480 INFO L288 CegarLoopForPetriNet]: 270 programPoint places, -3 predicate places. [2022-11-18 20:13:17,480 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 271 transitions, 560 flow [2022-11-18 20:13:17,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 268.5) internal successors, (537), 2 states have internal predecessors, (537), 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) [2022-11-18 20:13:17,481 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:17,481 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] [2022-11-18 20:13:17,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 20:13:17,482 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-18 20:13:17,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:17,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1370045522, now seen corresponding path program 1 times [2022-11-18 20:13:17,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:17,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44941242] [2022-11-18 20:13:17,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:17,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:17,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:17,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44941242] [2022-11-18 20:13:17,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44941242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:17,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:13:17,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:13:17,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157471005] [2022-11-18 20:13:17,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:17,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:13:17,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:17,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:13:17,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:13:17,518 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 325 [2022-11-18 20:13:17,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 271 transitions, 560 flow. Second operand has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 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) [2022-11-18 20:13:17,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:13:17,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 325 [2022-11-18 20:13:17,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:13:17,617 INFO L130 PetriNetUnfolder]: 17/517 cut-off events. [2022-11-18 20:13:17,617 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-18 20:13:17,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 517 events. 17/517 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2694 event pairs, 0 based on Foata normal form. 0/488 useless extension candidates. Maximal degree in co-relation 545. Up to 14 conditions per place. [2022-11-18 20:13:17,625 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 13 selfloop transitions, 2 changer transitions 0/275 dead transitions. [2022-11-18 20:13:17,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 275 transitions, 598 flow [2022-11-18 20:13:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:13:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:13:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 796 transitions. [2022-11-18 20:13:17,628 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8164102564102564 [2022-11-18 20:13:17,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 796 transitions. [2022-11-18 20:13:17,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 796 transitions. [2022-11-18 20:13:17,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:13:17,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 796 transitions. [2022-11-18 20:13:17,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 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) [2022-11-18 20:13:17,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 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) [2022-11-18 20:13:17,634 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 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) [2022-11-18 20:13:17,634 INFO L175 Difference]: Start difference. First operand has 267 places, 271 transitions, 560 flow. Second operand 3 states and 796 transitions. [2022-11-18 20:13:17,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 275 transitions, 598 flow [2022-11-18 20:13:17,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 275 transitions, 598 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:13:17,644 INFO L231 Difference]: Finished difference. Result has 270 places, 272 transitions, 572 flow [2022-11-18 20:13:17,645 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=572, PETRI_PLACES=270, PETRI_TRANSITIONS=272} [2022-11-18 20:13:17,647 INFO L288 CegarLoopForPetriNet]: 270 programPoint places, 0 predicate places. [2022-11-18 20:13:17,647 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 272 transitions, 572 flow [2022-11-18 20:13:17,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 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) [2022-11-18 20:13:17,648 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:17,648 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] [2022-11-18 20:13:17,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 20:13:17,649 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-18 20:13:17,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:17,655 INFO L85 PathProgramCache]: Analyzing trace with hash -892194908, now seen corresponding path program 1 times [2022-11-18 20:13:17,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:17,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869160531] [2022-11-18 20:13:17,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:17,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:17,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:17,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869160531] [2022-11-18 20:13:17,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869160531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:17,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930603930] [2022-11-18 20:13:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:17,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:17,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:17,762 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:17,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:13:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:17,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:13:17,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:13:17,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:13:17,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930603930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:17,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:13:17,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-18 20:13:17,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184831660] [2022-11-18 20:13:17,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:17,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:13:17,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:17,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:13:17,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:13:17,881 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 325 [2022-11-18 20:13:17,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 272 transitions, 572 flow. Second operand has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 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) [2022-11-18 20:13:17,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:13:17,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 325 [2022-11-18 20:13:17,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:13:18,003 INFO L130 PetriNetUnfolder]: 13/421 cut-off events. [2022-11-18 20:13:18,004 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-18 20:13:18,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 421 events. 13/421 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1990 event pairs, 0 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 457. Up to 16 conditions per place. [2022-11-18 20:13:18,011 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 13 selfloop transitions, 2 changer transitions 0/276 dead transitions. [2022-11-18 20:13:18,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 276 transitions, 610 flow [2022-11-18 20:13:18,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:13:18,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:13:18,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 796 transitions. [2022-11-18 20:13:18,014 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8164102564102564 [2022-11-18 20:13:18,014 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 796 transitions. [2022-11-18 20:13:18,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 796 transitions. [2022-11-18 20:13:18,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:13:18,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 796 transitions. [2022-11-18 20:13:18,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 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) [2022-11-18 20:13:18,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 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) [2022-11-18 20:13:18,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 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) [2022-11-18 20:13:18,020 INFO L175 Difference]: Start difference. First operand has 270 places, 272 transitions, 572 flow. Second operand 3 states and 796 transitions. [2022-11-18 20:13:18,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 276 transitions, 610 flow [2022-11-18 20:13:18,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 276 transitions, 608 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:13:18,026 INFO L231 Difference]: Finished difference. Result has 272 places, 273 transitions, 582 flow [2022-11-18 20:13:18,027 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=582, PETRI_PLACES=272, PETRI_TRANSITIONS=273} [2022-11-18 20:13:18,027 INFO L288 CegarLoopForPetriNet]: 270 programPoint places, 2 predicate places. [2022-11-18 20:13:18,028 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 273 transitions, 582 flow [2022-11-18 20:13:18,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 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) [2022-11-18 20:13:18,028 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:18,028 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 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] [2022-11-18 20:13:18,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:13:18,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:18,239 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-18 20:13:18,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:18,240 INFO L85 PathProgramCache]: Analyzing trace with hash 548848008, now seen corresponding path program 1 times [2022-11-18 20:13:18,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:18,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764356720] [2022-11-18 20:13:18,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:18,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 20:13:18,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:18,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764356720] [2022-11-18 20:13:18,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764356720] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:18,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788249182] [2022-11-18 20:13:18,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:18,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:18,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:18,303 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:18,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:13:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:18,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:13:18,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 20:13:18,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:13:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 20:13:18,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788249182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:13:18,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:13:18,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 20:13:18,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911805932] [2022-11-18 20:13:18,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:13:18,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:13:18,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:18,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:13:18,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:13:18,484 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 325 [2022-11-18 20:13:18,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 273 transitions, 582 flow. Second operand has 10 states, 10 states have (on average 261.2) internal successors, (2612), 10 states have internal predecessors, (2612), 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) [2022-11-18 20:13:18,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:13:18,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 325 [2022-11-18 20:13:18,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:13:18,654 INFO L130 PetriNetUnfolder]: 13/428 cut-off events. [2022-11-18 20:13:18,655 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-18 20:13:18,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 428 events. 13/428 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1980 event pairs, 0 based on Foata normal form. 2/410 useless extension candidates. Maximal degree in co-relation 475. Up to 11 conditions per place. [2022-11-18 20:13:18,660 INFO L137 encePairwiseOnDemand]: 319/325 looper letters, 14 selfloop transitions, 9 changer transitions 0/283 dead transitions. [2022-11-18 20:13:18,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 283 transitions, 650 flow [2022-11-18 20:13:18,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:13:18,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:13:18,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2356 transitions. [2022-11-18 20:13:18,667 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8054700854700855 [2022-11-18 20:13:18,667 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2356 transitions. [2022-11-18 20:13:18,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2356 transitions. [2022-11-18 20:13:18,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:13:18,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2356 transitions. [2022-11-18 20:13:18,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 261.77777777777777) internal successors, (2356), 9 states have internal predecessors, (2356), 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) [2022-11-18 20:13:18,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 325.0) internal successors, (3250), 10 states have internal predecessors, (3250), 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) [2022-11-18 20:13:18,680 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 325.0) internal successors, (3250), 10 states have internal predecessors, (3250), 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) [2022-11-18 20:13:18,681 INFO L175 Difference]: Start difference. First operand has 272 places, 273 transitions, 582 flow. Second operand 9 states and 2356 transitions. [2022-11-18 20:13:18,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 283 transitions, 650 flow [2022-11-18 20:13:18,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 283 transitions, 648 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:13:18,688 INFO L231 Difference]: Finished difference. Result has 282 places, 279 transitions, 630 flow [2022-11-18 20:13:18,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=630, PETRI_PLACES=282, PETRI_TRANSITIONS=279} [2022-11-18 20:13:18,690 INFO L288 CegarLoopForPetriNet]: 270 programPoint places, 12 predicate places. [2022-11-18 20:13:18,690 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 279 transitions, 630 flow [2022-11-18 20:13:18,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 261.2) internal successors, (2612), 10 states have internal predecessors, (2612), 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) [2022-11-18 20:13:18,691 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:18,691 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2022-11-18 20:13:18,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-18 20:13:18,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:13:18,898 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-18 20:13:18,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:18,898 INFO L85 PathProgramCache]: Analyzing trace with hash -212402232, now seen corresponding path program 2 times [2022-11-18 20:13:18,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:18,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607173607] [2022-11-18 20:13:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:18,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 20:13:19,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:19,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607173607] [2022-11-18 20:13:19,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607173607] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:19,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385823376] [2022-11-18 20:13:19,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:13:19,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:19,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:19,026 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:19,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:13:19,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:13:19,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:13:19,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:13:19,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 20:13:19,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:13:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 20:13:19,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385823376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:13:19,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:13:19,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 20:13:19,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865112604] [2022-11-18 20:13:19,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:13:19,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:13:19,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:19,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:13:19,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:13:19,318 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 325 [2022-11-18 20:13:19,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 279 transitions, 630 flow. Second operand has 18 states, 18 states have (on average 261.3333333333333) internal successors, (4704), 18 states have internal predecessors, (4704), 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) [2022-11-18 20:13:19,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:13:19,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 325 [2022-11-18 20:13:19,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:13:19,657 INFO L130 PetriNetUnfolder]: 13/448 cut-off events. [2022-11-18 20:13:19,657 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-11-18 20:13:19,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 448 events. 13/448 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1980 event pairs, 0 based on Foata normal form. 4/432 useless extension candidates. Maximal degree in co-relation 562. Up to 11 conditions per place. [2022-11-18 20:13:19,663 INFO L137 encePairwiseOnDemand]: 319/325 looper letters, 22 selfloop transitions, 21 changer transitions 0/303 dead transitions. [2022-11-18 20:13:19,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 303 transitions, 824 flow [2022-11-18 20:13:19,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:13:19,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 20:13:19,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5486 transitions. [2022-11-18 20:13:19,676 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8038095238095239 [2022-11-18 20:13:19,676 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5486 transitions. [2022-11-18 20:13:19,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5486 transitions. [2022-11-18 20:13:19,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:13:19,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5486 transitions. [2022-11-18 20:13:19,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 261.23809523809524) internal successors, (5486), 21 states have internal predecessors, (5486), 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) [2022-11-18 20:13:19,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 325.0) internal successors, (7150), 22 states have internal predecessors, (7150), 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) [2022-11-18 20:13:19,706 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 325.0) internal successors, (7150), 22 states have internal predecessors, (7150), 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) [2022-11-18 20:13:19,706 INFO L175 Difference]: Start difference. First operand has 282 places, 279 transitions, 630 flow. Second operand 21 states and 5486 transitions. [2022-11-18 20:13:19,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 303 transitions, 824 flow [2022-11-18 20:13:19,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 303 transitions, 810 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 20:13:19,714 INFO L231 Difference]: Finished difference. Result has 306 places, 292 transitions, 754 flow [2022-11-18 20:13:19,715 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=754, PETRI_PLACES=306, PETRI_TRANSITIONS=292} [2022-11-18 20:13:19,716 INFO L288 CegarLoopForPetriNet]: 270 programPoint places, 36 predicate places. [2022-11-18 20:13:19,716 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 292 transitions, 754 flow [2022-11-18 20:13:19,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 261.3333333333333) internal successors, (4704), 18 states have internal predecessors, (4704), 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) [2022-11-18 20:13:19,718 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:19,718 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 3, 2, 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] [2022-11-18 20:13:19,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:13:19,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:19,924 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-18 20:13:19,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:19,924 INFO L85 PathProgramCache]: Analyzing trace with hash 247532616, now seen corresponding path program 3 times [2022-11-18 20:13:19,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:19,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771661796] [2022-11-18 20:13:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:19,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 20:13:20,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:20,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771661796] [2022-11-18 20:13:20,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771661796] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:20,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974632510] [2022-11-18 20:13:20,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:13:20,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:20,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:20,275 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:20,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:13:20,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-18 20:13:20,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:13:20,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:13:20,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 20:13:20,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:13:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 20:13:20,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974632510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:13:20,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:13:20,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-18 20:13:20,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302271826] [2022-11-18 20:13:20,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:13:20,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:13:20,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:20,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:13:20,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:13:20,807 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 325 [2022-11-18 20:13:20,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 292 transitions, 754 flow. Second operand has 23 states, 23 states have (on average 261.4782608695652) internal successors, (6014), 23 states have internal predecessors, (6014), 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) [2022-11-18 20:13:20,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:13:20,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 325 [2022-11-18 20:13:20,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:13:21,237 INFO L130 PetriNetUnfolder]: 13/463 cut-off events. [2022-11-18 20:13:21,238 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-11-18 20:13:21,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 673 conditions, 463 events. 13/463 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1980 event pairs, 0 based on Foata normal form. 3/446 useless extension candidates. Maximal degree in co-relation 658. Up to 17 conditions per place. [2022-11-18 20:13:21,245 INFO L137 encePairwiseOnDemand]: 319/325 looper letters, 28 selfloop transitions, 30 changer transitions 0/318 dead transitions. [2022-11-18 20:13:21,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 318 transitions, 1016 flow [2022-11-18 20:13:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 20:13:21,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-18 20:13:21,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7831 transitions. [2022-11-18 20:13:21,255 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8031794871794872 [2022-11-18 20:13:21,255 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7831 transitions. [2022-11-18 20:13:21,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7831 transitions. [2022-11-18 20:13:21,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:13:21,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7831 transitions. [2022-11-18 20:13:21,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 261.03333333333336) internal successors, (7831), 30 states have internal predecessors, (7831), 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) [2022-11-18 20:13:21,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 325.0) internal successors, (10075), 31 states have internal predecessors, (10075), 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) [2022-11-18 20:13:21,288 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 325.0) internal successors, (10075), 31 states have internal predecessors, (10075), 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) [2022-11-18 20:13:21,288 INFO L175 Difference]: Start difference. First operand has 306 places, 292 transitions, 754 flow. Second operand 30 states and 7831 transitions. [2022-11-18 20:13:21,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 318 transitions, 1016 flow [2022-11-18 20:13:21,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 318 transitions, 986 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-18 20:13:21,296 INFO L231 Difference]: Finished difference. Result has 333 places, 302 transitions, 882 flow [2022-11-18 20:13:21,296 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=882, PETRI_PLACES=333, PETRI_TRANSITIONS=302} [2022-11-18 20:13:21,297 INFO L288 CegarLoopForPetriNet]: 270 programPoint places, 63 predicate places. [2022-11-18 20:13:21,297 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 302 transitions, 882 flow [2022-11-18 20:13:21,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 261.4782608695652) internal successors, (6014), 23 states have internal predecessors, (6014), 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) [2022-11-18 20:13:21,300 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:21,300 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 3, 3, 3, 3, 2, 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] [2022-11-18 20:13:21,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:13:21,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:21,512 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-18 20:13:21,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:21,512 INFO L85 PathProgramCache]: Analyzing trace with hash 940487122, now seen corresponding path program 4 times [2022-11-18 20:13:21,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:21,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693471958] [2022-11-18 20:13:21,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:21,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:13:21,540 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:13:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:13:21,566 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:13:21,566 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:13:21,566 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-18 20:13:21,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-18 20:13:21,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-18 20:13:21,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-18 20:13:21,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-18 20:13:21,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-18 20:13:21,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 20:13:21,568 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-11-18 20:13:21,568 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:13:21,569 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-18 20:13:21,608 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 20:13:21,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 398 transitions, 826 flow [2022-11-18 20:13:21,771 INFO L130 PetriNetUnfolder]: 168/889 cut-off events. [2022-11-18 20:13:21,771 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-18 20:13:21,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 917 conditions, 889 events. 168/889 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4825 event pairs, 1 based on Foata normal form. 0/706 useless extension candidates. Maximal degree in co-relation 630. Up to 16 conditions per place. [2022-11-18 20:13:21,788 INFO L82 GeneralOperation]: Start removeDead. Operand has 330 places, 398 transitions, 826 flow [2022-11-18 20:13:21,800 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 330 places, 398 transitions, 826 flow [2022-11-18 20:13:21,801 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:13:21,802 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;@645bc82f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:13:21,802 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-18 20:13:21,813 INFO L130 PetriNetUnfolder]: 22/164 cut-off events. [2022-11-18 20:13:21,813 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:13:21,813 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:21,813 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] [2022-11-18 20:13:21,814 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 20:13:21,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:21,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1965808149, now seen corresponding path program 1 times [2022-11-18 20:13:21,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:21,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689336373] [2022-11-18 20:13:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:21,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:21,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:21,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689336373] [2022-11-18 20:13:21,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689336373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:21,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:13:21,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:13:21,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568235719] [2022-11-18 20:13:21,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:21,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:13:21,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:21,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:13:21,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:13:21,833 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 398 [2022-11-18 20:13:21,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 398 transitions, 826 flow. Second operand has 2 states, 2 states have (on average 326.5) internal successors, (653), 2 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) [2022-11-18 20:13:21,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:13:21,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 398 [2022-11-18 20:13:21,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:13:22,028 INFO L130 PetriNetUnfolder]: 27/737 cut-off events. [2022-11-18 20:13:22,028 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-11-18 20:13:22,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 737 events. 27/737 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4170 event pairs, 1 based on Foata normal form. 256/951 useless extension candidates. Maximal degree in co-relation 527. Up to 16 conditions per place. [2022-11-18 20:13:22,041 INFO L137 encePairwiseOnDemand]: 336/398 looper letters, 6 selfloop transitions, 0 changer transitions 0/331 dead transitions. [2022-11-18 20:13:22,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 331 transitions, 704 flow [2022-11-18 20:13:22,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:13:22,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:13:22,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 718 transitions. [2022-11-18 20:13:22,044 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9020100502512562 [2022-11-18 20:13:22,044 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 718 transitions. [2022-11-18 20:13:22,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 718 transitions. [2022-11-18 20:13:22,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:13:22,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 718 transitions. [2022-11-18 20:13:22,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 359.0) internal successors, (718), 2 states have internal predecessors, (718), 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) [2022-11-18 20:13:22,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 398.0) internal successors, (1194), 3 states have internal predecessors, (1194), 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) [2022-11-18 20:13:22,049 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 398.0) internal successors, (1194), 3 states have internal predecessors, (1194), 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) [2022-11-18 20:13:22,050 INFO L175 Difference]: Start difference. First operand has 330 places, 398 transitions, 826 flow. Second operand 2 states and 718 transitions. [2022-11-18 20:13:22,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 331 transitions, 704 flow [2022-11-18 20:13:22,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 331 transitions, 704 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:13:22,057 INFO L231 Difference]: Finished difference. Result has 326 places, 331 transitions, 692 flow [2022-11-18 20:13:22,058 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=692, PETRI_PLACES=326, PETRI_TRANSITIONS=331} [2022-11-18 20:13:22,059 INFO L288 CegarLoopForPetriNet]: 330 programPoint places, -4 predicate places. [2022-11-18 20:13:22,059 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 331 transitions, 692 flow [2022-11-18 20:13:22,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 326.5) internal successors, (653), 2 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) [2022-11-18 20:13:22,059 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:22,060 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] [2022-11-18 20:13:22,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 20:13:22,060 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 20:13:22,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:22,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1596131218, now seen corresponding path program 1 times [2022-11-18 20:13:22,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:22,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026466731] [2022-11-18 20:13:22,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:22,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:22,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:22,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026466731] [2022-11-18 20:13:22,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026466731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:22,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:13:22,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:13:22,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437753394] [2022-11-18 20:13:22,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:22,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:13:22,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:22,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:13:22,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:13:22,099 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 398 [2022-11-18 20:13:22,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 331 transitions, 692 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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) [2022-11-18 20:13:22,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:13:22,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 398 [2022-11-18 20:13:22,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:13:22,272 INFO L130 PetriNetUnfolder]: 27/741 cut-off events. [2022-11-18 20:13:22,272 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-11-18 20:13:22,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 741 events. 27/741 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4184 event pairs, 1 based on Foata normal form. 0/699 useless extension candidates. Maximal degree in co-relation 791. Up to 23 conditions per place. [2022-11-18 20:13:22,287 INFO L137 encePairwiseOnDemand]: 395/398 looper letters, 15 selfloop transitions, 2 changer transitions 0/335 dead transitions. [2022-11-18 20:13:22,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 335 transitions, 734 flow [2022-11-18 20:13:22,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:13:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:13:22,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 972 transitions. [2022-11-18 20:13:22,291 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8140703517587939 [2022-11-18 20:13:22,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 972 transitions. [2022-11-18 20:13:22,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 972 transitions. [2022-11-18 20:13:22,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:13:22,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 972 transitions. [2022-11-18 20:13:22,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 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) [2022-11-18 20:13:22,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:22,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:22,296 INFO L175 Difference]: Start difference. First operand has 326 places, 331 transitions, 692 flow. Second operand 3 states and 972 transitions. [2022-11-18 20:13:22,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 335 transitions, 734 flow [2022-11-18 20:13:22,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 335 transitions, 734 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:13:22,302 INFO L231 Difference]: Finished difference. Result has 329 places, 332 transitions, 704 flow [2022-11-18 20:13:22,303 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=704, PETRI_PLACES=329, PETRI_TRANSITIONS=332} [2022-11-18 20:13:22,304 INFO L288 CegarLoopForPetriNet]: 330 programPoint places, -1 predicate places. [2022-11-18 20:13:22,304 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 332 transitions, 704 flow [2022-11-18 20:13:22,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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) [2022-11-18 20:13:22,305 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:22,305 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] [2022-11-18 20:13:22,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 20:13:22,305 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 20:13:22,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:22,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1772982030, now seen corresponding path program 1 times [2022-11-18 20:13:22,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:22,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257428354] [2022-11-18 20:13:22,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:22,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:22,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:22,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257428354] [2022-11-18 20:13:22,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257428354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:22,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217676678] [2022-11-18 20:13:22,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:22,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:22,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:22,366 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:22,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:13:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:22,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:13:22,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:13:22,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:13:22,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217676678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:22,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:13:22,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-18 20:13:22,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834778319] [2022-11-18 20:13:22,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:22,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:13:22,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:22,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:13:22,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:13:22,483 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 398 [2022-11-18 20:13:22,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 332 transitions, 704 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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) [2022-11-18 20:13:22,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:13:22,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 398 [2022-11-18 20:13:22,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:13:22,664 INFO L130 PetriNetUnfolder]: 23/645 cut-off events. [2022-11-18 20:13:22,664 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-11-18 20:13:22,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 645 events. 23/645 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3481 event pairs, 1 based on Foata normal form. 0/610 useless extension candidates. Maximal degree in co-relation 708. Up to 30 conditions per place. [2022-11-18 20:13:22,678 INFO L137 encePairwiseOnDemand]: 395/398 looper letters, 15 selfloop transitions, 2 changer transitions 0/336 dead transitions. [2022-11-18 20:13:22,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 336 transitions, 746 flow [2022-11-18 20:13:22,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:13:22,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:13:22,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 972 transitions. [2022-11-18 20:13:22,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8140703517587939 [2022-11-18 20:13:22,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 972 transitions. [2022-11-18 20:13:22,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 972 transitions. [2022-11-18 20:13:22,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:13:22,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 972 transitions. [2022-11-18 20:13:22,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 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) [2022-11-18 20:13:22,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:22,691 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:22,691 INFO L175 Difference]: Start difference. First operand has 329 places, 332 transitions, 704 flow. Second operand 3 states and 972 transitions. [2022-11-18 20:13:22,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 336 transitions, 746 flow [2022-11-18 20:13:22,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 336 transitions, 744 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:13:22,698 INFO L231 Difference]: Finished difference. Result has 331 places, 333 transitions, 714 flow [2022-11-18 20:13:22,698 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=714, PETRI_PLACES=331, PETRI_TRANSITIONS=333} [2022-11-18 20:13:22,699 INFO L288 CegarLoopForPetriNet]: 330 programPoint places, 1 predicate places. [2022-11-18 20:13:22,699 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 333 transitions, 714 flow [2022-11-18 20:13:22,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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) [2022-11-18 20:13:22,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:22,700 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] [2022-11-18 20:13:22,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:13:22,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:22,906 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 20:13:22,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:22,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2096839157, now seen corresponding path program 1 times [2022-11-18 20:13:22,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:22,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335364293] [2022-11-18 20:13:22,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:22,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:13:22,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:22,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335364293] [2022-11-18 20:13:22,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335364293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:22,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131114392] [2022-11-18 20:13:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:22,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:22,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:22,969 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:22,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:13:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:23,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:13:23,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:13:23,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:13:23,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131114392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:23,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:13:23,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-18 20:13:23,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581542444] [2022-11-18 20:13:23,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:23,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:13:23,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:23,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:13:23,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:13:23,109 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 398 [2022-11-18 20:13:23,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 333 transitions, 714 flow. Second operand has 3 states, 3 states have (on average 318.6666666666667) internal successors, (956), 3 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) [2022-11-18 20:13:23,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:13:23,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 398 [2022-11-18 20:13:23,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:13:23,350 INFO L130 PetriNetUnfolder]: 26/798 cut-off events. [2022-11-18 20:13:23,351 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-18 20:13:23,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 798 events. 26/798 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3972 event pairs, 1 based on Foata normal form. 0/760 useless extension candidates. Maximal degree in co-relation 881. Up to 36 conditions per place. [2022-11-18 20:13:23,366 INFO L137 encePairwiseOnDemand]: 395/398 looper letters, 16 selfloop transitions, 2 changer transitions 0/337 dead transitions. [2022-11-18 20:13:23,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 337 transitions, 758 flow [2022-11-18 20:13:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:13:23,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:13:23,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 970 transitions. [2022-11-18 20:13:23,368 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8123953098827471 [2022-11-18 20:13:23,368 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 970 transitions. [2022-11-18 20:13:23,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 970 transitions. [2022-11-18 20:13:23,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:13:23,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 970 transitions. [2022-11-18 20:13:23,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 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) [2022-11-18 20:13:23,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:23,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:23,373 INFO L175 Difference]: Start difference. First operand has 331 places, 333 transitions, 714 flow. Second operand 3 states and 970 transitions. [2022-11-18 20:13:23,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 337 transitions, 758 flow [2022-11-18 20:13:23,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 337 transitions, 756 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:13:23,380 INFO L231 Difference]: Finished difference. Result has 333 places, 334 transitions, 724 flow [2022-11-18 20:13:23,381 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=724, PETRI_PLACES=333, PETRI_TRANSITIONS=334} [2022-11-18 20:13:23,382 INFO L288 CegarLoopForPetriNet]: 330 programPoint places, 3 predicate places. [2022-11-18 20:13:23,382 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 334 transitions, 724 flow [2022-11-18 20:13:23,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 318.6666666666667) internal successors, (956), 3 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) [2022-11-18 20:13:23,382 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:23,383 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, 1] [2022-11-18 20:13:23,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:13:23,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:23,588 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 20:13:23,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:23,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1809983843, now seen corresponding path program 1 times [2022-11-18 20:13:23,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:23,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149785853] [2022-11-18 20:13:23,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:23,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:23,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:23,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149785853] [2022-11-18 20:13:23,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149785853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:23,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623731966] [2022-11-18 20:13:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:23,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:23,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:23,656 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:23,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:13:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:23,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:13:23,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:23,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:13:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:23,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623731966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:13:23,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:13:23,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 20:13:23,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943558786] [2022-11-18 20:13:23,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:13:23,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:13:23,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:23,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:13:23,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:13:23,843 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 398 [2022-11-18 20:13:23,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 334 transitions, 724 flow. Second operand has 10 states, 10 states have (on average 319.1) internal successors, (3191), 10 states have internal predecessors, (3191), 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) [2022-11-18 20:13:23,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:13:23,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 398 [2022-11-18 20:13:23,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:13:24,156 INFO L130 PetriNetUnfolder]: 26/805 cut-off events. [2022-11-18 20:13:24,156 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-11-18 20:13:24,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 805 events. 26/805 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3981 event pairs, 1 based on Foata normal form. 2/772 useless extension candidates. Maximal degree in co-relation 890. Up to 20 conditions per place. [2022-11-18 20:13:24,173 INFO L137 encePairwiseOnDemand]: 392/398 looper letters, 16 selfloop transitions, 9 changer transitions 0/344 dead transitions. [2022-11-18 20:13:24,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 344 transitions, 796 flow [2022-11-18 20:13:24,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:13:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:13:24,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2880 transitions. [2022-11-18 20:13:24,178 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8040201005025126 [2022-11-18 20:13:24,179 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2880 transitions. [2022-11-18 20:13:24,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2880 transitions. [2022-11-18 20:13:24,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:13:24,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2880 transitions. [2022-11-18 20:13:24,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 320.0) internal successors, (2880), 9 states have internal predecessors, (2880), 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) [2022-11-18 20:13:24,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 398.0) internal successors, (3980), 10 states have internal predecessors, (3980), 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) [2022-11-18 20:13:24,192 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 398.0) internal successors, (3980), 10 states have internal predecessors, (3980), 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) [2022-11-18 20:13:24,193 INFO L175 Difference]: Start difference. First operand has 333 places, 334 transitions, 724 flow. Second operand 9 states and 2880 transitions. [2022-11-18 20:13:24,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 344 transitions, 796 flow [2022-11-18 20:13:24,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 344 transitions, 794 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:13:24,200 INFO L231 Difference]: Finished difference. Result has 343 places, 340 transitions, 772 flow [2022-11-18 20:13:24,202 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=772, PETRI_PLACES=343, PETRI_TRANSITIONS=340} [2022-11-18 20:13:24,203 INFO L288 CegarLoopForPetriNet]: 330 programPoint places, 13 predicate places. [2022-11-18 20:13:24,203 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 340 transitions, 772 flow [2022-11-18 20:13:24,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 319.1) internal successors, (3191), 10 states have internal predecessors, (3191), 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) [2022-11-18 20:13:24,204 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:24,205 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:13:24,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:13:24,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:13:24,416 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 20:13:24,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:24,417 INFO L85 PathProgramCache]: Analyzing trace with hash -312293661, now seen corresponding path program 2 times [2022-11-18 20:13:24,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:24,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738397096] [2022-11-18 20:13:24,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:24,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:24,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:24,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738397096] [2022-11-18 20:13:24,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738397096] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:24,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509701861] [2022-11-18 20:13:24,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:13:24,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:24,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:24,568 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:24,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b30f25-419e-4d0d-85e2-b7ffdbc7c92b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:13:24,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:13:24,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:13:24,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:13:24,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:24,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-18 20:13:24,989 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:13:24,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:13:25,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-18 20:13:25,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 20:13:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 20:13:25,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:13:25,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509701861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:25,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:13:25,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 19 [2022-11-18 20:13:25,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29891302] [2022-11-18 20:13:25,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:25,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:13:25,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:25,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:13:25,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:13:25,240 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 398 [2022-11-18 20:13:25,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 340 transitions, 772 flow. Second operand has 12 states, 12 states have (on average 267.3333333333333) internal successors, (3208), 12 states have internal predecessors, (3208), 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) [2022-11-18 20:13:25,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:13:25,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 398 [2022-11-18 20:13:25,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand