./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ --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 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 --- 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-dbf71c6-m [2022-10-17 10:29:00,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:29:00,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:29:00,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:29:00,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:29:00,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:29:00,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:29:00,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:29:00,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:29:00,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:29:00,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:29:00,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:29:00,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:29:00,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:29:00,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:29:00,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:29:00,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:29:00,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:29:00,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:29:00,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:29:00,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:29:00,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:29:00,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:29:00,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:29:00,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:29:00,971 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:29:00,971 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:29:00,972 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:29:00,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:29:00,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:29:00,974 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:29:00,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:29:00,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:29:00,977 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:29:00,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:29:00,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:29:00,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:29:00,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:29:00,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:29:00,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:29:00,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:29:00,988 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:29:01,034 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:29:01,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:29:01,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:29:01,035 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:29:01,035 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:29:01,036 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:29:01,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:29:01,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:29:01,037 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:29:01,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:29:01,037 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:29:01,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:29:01,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:29:01,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:29:01,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:29:01,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:29:01,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:29:01,043 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:29:01,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:29:01,043 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:29:01,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:29:01,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:29:01,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:29:01,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:29:01,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:29:01,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:29:01,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:29:01,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:29:01,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:29:01,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:29:01,047 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:29:01,047 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:29:01,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:29:01,048 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_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 [2022-10-17 10:29:01,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:29:01,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:29:01,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:29:01,425 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:29:01,426 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:29:01,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2022-10-17 10:29:01,503 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/data/fa41489f5/392e72505c1f40f09820a3fd16807e99/FLAG541df2814 [2022-10-17 10:29:02,029 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:29:02,030 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2022-10-17 10:29:02,049 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/data/fa41489f5/392e72505c1f40f09820a3fd16807e99/FLAG541df2814 [2022-10-17 10:29:02,318 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/data/fa41489f5/392e72505c1f40f09820a3fd16807e99 [2022-10-17 10:29:02,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:29:02,322 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:29:02,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:29:02,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:29:02,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:29:02,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:29:02" (1/1) ... [2022-10-17 10:29:02,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@509a9ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:02, skipping insertion in model container [2022-10-17 10:29:02,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:29:02" (1/1) ... [2022-10-17 10:29:02,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:29:02,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:29:02,730 WARN L230 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_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i[30176,30189] [2022-10-17 10:29:02,762 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:29:02,774 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:29:02,833 WARN L230 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_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i[30176,30189] [2022-10-17 10:29:02,845 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:29:02,904 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:29:02,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:02 WrapperNode [2022-10-17 10:29:02,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:29:02,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:29:02,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:29:02,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:29:02,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:02" (1/1) ... [2022-10-17 10:29:02,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:02" (1/1) ... [2022-10-17 10:29:02,982 INFO L138 Inliner]: procedures = 172, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 106 [2022-10-17 10:29:02,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:29:02,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:29:02,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:29:02,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:29:02,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:02" (1/1) ... [2022-10-17 10:29:02,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:02" (1/1) ... [2022-10-17 10:29:03,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:02" (1/1) ... [2022-10-17 10:29:03,002 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:02" (1/1) ... [2022-10-17 10:29:03,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:02" (1/1) ... [2022-10-17 10:29:03,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:02" (1/1) ... [2022-10-17 10:29:03,031 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:02" (1/1) ... [2022-10-17 10:29:03,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:02" (1/1) ... [2022-10-17 10:29:03,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:29:03,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:29:03,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:29:03,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:29:03,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:02" (1/1) ... [2022-10-17 10:29:03,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:29:03,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:29:03,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:29:03,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:29:03,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:29:03,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:29:03,115 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-10-17 10:29:03,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:29:03,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:29:03,116 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-10-17 10:29:03,116 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-10-17 10:29:03,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:29:03,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:29:03,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:29:03,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:29:03,123 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 10:29:03,317 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:29:03,319 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:29:03,629 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:29:03,638 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:29:03,639 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-10-17 10:29:03,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:29:03 BoogieIcfgContainer [2022-10-17 10:29:03,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:29:03,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:29:03,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:29:03,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:29:03,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:29:02" (1/3) ... [2022-10-17 10:29:03,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b25df2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:29:03, skipping insertion in model container [2022-10-17 10:29:03,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:02" (2/3) ... [2022-10-17 10:29:03,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b25df2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:29:03, skipping insertion in model container [2022-10-17 10:29:03,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:29:03" (3/3) ... [2022-10-17 10:29:03,655 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_05-lockfuns_racefree.i [2022-10-17 10:29:03,670 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:29:03,683 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:29:03,683 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:29:03,683 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:29:03,785 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-10-17 10:29:03,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 115 transitions, 238 flow [2022-10-17 10:29:03,970 INFO L130 PetriNetUnfolder]: 17/156 cut-off events. [2022-10-17 10:29:03,971 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:29:03,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 156 events. 17/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 382 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2022-10-17 10:29:03,976 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 115 transitions, 238 flow [2022-10-17 10:29:03,982 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 110 transitions, 225 flow [2022-10-17 10:29:04,002 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:29:04,010 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;@197e72ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:29:04,011 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 10:29:04,053 INFO L130 PetriNetUnfolder]: 5/91 cut-off events. [2022-10-17 10:29:04,053 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:29:04,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:04,054 INFO L208 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] [2022-10-17 10:29:04,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:29:04,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:04,061 INFO L85 PathProgramCache]: Analyzing trace with hash 438148196, now seen corresponding path program 1 times [2022-10-17 10:29:04,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:04,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703403280] [2022-10-17 10:29:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:04,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:04,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:04,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703403280] [2022-10-17 10:29:04,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703403280] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:04,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:04,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:29:04,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628122241] [2022-10-17 10:29:04,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:04,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:29:04,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:04,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:29:04,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:29:04,545 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 115 [2022-10-17 10:29:04,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 110 transitions, 225 flow. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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) [2022-10-17 10:29:04,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:04,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 115 [2022-10-17 10:29:04,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:29:04,625 INFO L130 PetriNetUnfolder]: 0/102 cut-off events. [2022-10-17 10:29:04,626 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:29:04,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 102 events. 0/102 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 87 event pairs, 0 based on Foata normal form. 18/117 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-10-17 10:29:04,628 INFO L137 encePairwiseOnDemand]: 101/115 looper letters, 8 selfloop transitions, 2 changer transitions 17/100 dead transitions. [2022-10-17 10:29:04,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 225 flow [2022-10-17 10:29:04,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:29:04,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:29:04,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 311 transitions. [2022-10-17 10:29:04,643 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9014492753623189 [2022-10-17 10:29:04,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 311 transitions. [2022-10-17 10:29:04,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 311 transitions. [2022-10-17 10:29:04,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:29:04,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 311 transitions. [2022-10-17 10:29:04,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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) [2022-10-17 10:29:04,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 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) [2022-10-17 10:29:04,661 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 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) [2022-10-17 10:29:04,663 INFO L175 Difference]: Start difference. First operand has 102 places, 110 transitions, 225 flow. Second operand 3 states and 311 transitions. [2022-10-17 10:29:04,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 225 flow [2022-10-17 10:29:04,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 100 transitions, 225 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:29:04,672 INFO L231 Difference]: Finished difference. Result has 104 places, 81 transitions, 175 flow [2022-10-17 10:29:04,674 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=104, PETRI_TRANSITIONS=81} [2022-10-17 10:29:04,678 INFO L287 CegarLoopForPetriNet]: 102 programPoint places, 2 predicate places. [2022-10-17 10:29:04,678 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 81 transitions, 175 flow [2022-10-17 10:29:04,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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) [2022-10-17 10:29:04,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:04,679 INFO L208 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] [2022-10-17 10:29:04,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:29:04,680 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:29:04,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:04,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1685952027, now seen corresponding path program 1 times [2022-10-17 10:29:04,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:04,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435162685] [2022-10-17 10:29:04,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:04,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:04,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:29:04,722 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:29:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:29:04,778 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:29:04,778 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:29:04,780 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-10-17 10:29:04,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-10-17 10:29:04,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:29:04,783 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-17 10:29:04,786 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:29:04,786 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-10-17 10:29:04,813 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-10-17 10:29:04,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 150 transitions, 318 flow [2022-10-17 10:29:04,893 INFO L130 PetriNetUnfolder]: 31/257 cut-off events. [2022-10-17 10:29:04,893 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-10-17 10:29:04,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 31/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 805 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2022-10-17 10:29:04,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 150 transitions, 318 flow [2022-10-17 10:29:04,900 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 150 transitions, 318 flow [2022-10-17 10:29:04,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:29:04,902 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;@197e72ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:29:04,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 10:29:04,915 INFO L130 PetriNetUnfolder]: 5/91 cut-off events. [2022-10-17 10:29:04,915 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:29:04,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:04,915 INFO L208 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] [2022-10-17 10:29:04,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:29:04,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:04,916 INFO L85 PathProgramCache]: Analyzing trace with hash -390354118, now seen corresponding path program 1 times [2022-10-17 10:29:04,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:04,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992904688] [2022-10-17 10:29:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:04,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:05,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:05,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992904688] [2022-10-17 10:29:05,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992904688] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:05,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:05,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:29:05,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425066033] [2022-10-17 10:29:05,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:05,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:29:05,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:05,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:29:05,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:29:05,012 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 150 [2022-10-17 10:29:05,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 150 transitions, 318 flow. Second operand has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 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) [2022-10-17 10:29:05,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:05,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 150 [2022-10-17 10:29:05,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:29:05,079 INFO L130 PetriNetUnfolder]: 2/204 cut-off events. [2022-10-17 10:29:05,079 INFO L131 PetriNetUnfolder]: For 20/31 co-relation queries the response was YES. [2022-10-17 10:29:05,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 204 events. 2/204 cut-off events. For 20/31 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 466 event pairs, 0 based on Foata normal form. 65/261 useless extension candidates. Maximal degree in co-relation 132. Up to 16 conditions per place. [2022-10-17 10:29:05,081 INFO L137 encePairwiseOnDemand]: 130/150 looper letters, 11 selfloop transitions, 2 changer transitions 23/136 dead transitions. [2022-10-17 10:29:05,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 136 transitions, 320 flow [2022-10-17 10:29:05,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:29:05,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:29:05,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2022-10-17 10:29:05,085 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8955555555555555 [2022-10-17 10:29:05,085 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2022-10-17 10:29:05,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2022-10-17 10:29:05,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:29:05,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2022-10-17 10:29:05,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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) [2022-10-17 10:29:05,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 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) [2022-10-17 10:29:05,091 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 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) [2022-10-17 10:29:05,091 INFO L175 Difference]: Start difference. First operand has 136 places, 150 transitions, 318 flow. Second operand 3 states and 403 transitions. [2022-10-17 10:29:05,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 136 transitions, 320 flow [2022-10-17 10:29:05,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 136 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:29:05,096 INFO L231 Difference]: Finished difference. Result has 138 places, 110 transitions, 242 flow [2022-10-17 10:29:05,097 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=138, PETRI_TRANSITIONS=110} [2022-10-17 10:29:05,098 INFO L287 CegarLoopForPetriNet]: 136 programPoint places, 2 predicate places. [2022-10-17 10:29:05,098 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 110 transitions, 242 flow [2022-10-17 10:29:05,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 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) [2022-10-17 10:29:05,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:05,099 INFO L208 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] [2022-10-17 10:29:05,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:29:05,099 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:29:05,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:05,100 INFO L85 PathProgramCache]: Analyzing trace with hash -993521947, now seen corresponding path program 1 times [2022-10-17 10:29:05,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:05,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347841404] [2022-10-17 10:29:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:05,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:05,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:05,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347841404] [2022-10-17 10:29:05,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347841404] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:29:05,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358106144] [2022-10-17 10:29:05,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:05,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:29:05,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:29:05,333 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:29:05,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:29:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:05,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:29:05,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:29:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:05,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:29:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:05,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358106144] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:29:05,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:29:05,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-10-17 10:29:05,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775060721] [2022-10-17 10:29:05,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:29:05,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:29:05,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:05,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:29:05,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:29:05,626 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 150 [2022-10-17 10:29:05,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 110 transitions, 242 flow. Second operand has 10 states, 10 states have (on average 122.3) internal successors, (1223), 10 states have internal predecessors, (1223), 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) [2022-10-17 10:29:05,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:05,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 150 [2022-10-17 10:29:05,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:29:05,726 INFO L130 PetriNetUnfolder]: 0/108 cut-off events. [2022-10-17 10:29:05,726 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-10-17 10:29:05,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 108 events. 0/108 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 0 based on Foata normal form. 2/110 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-10-17 10:29:05,728 INFO L137 encePairwiseOnDemand]: 145/150 looper letters, 9 selfloop transitions, 7 changer transitions 0/102 dead transitions. [2022-10-17 10:29:05,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 102 transitions, 256 flow [2022-10-17 10:29:05,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:29:05,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-10-17 10:29:05,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1098 transitions. [2022-10-17 10:29:05,734 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8133333333333334 [2022-10-17 10:29:05,734 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1098 transitions. [2022-10-17 10:29:05,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1098 transitions. [2022-10-17 10:29:05,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:29:05,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1098 transitions. [2022-10-17 10:29:05,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 122.0) internal successors, (1098), 9 states have internal predecessors, (1098), 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) [2022-10-17 10:29:05,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 150.0) internal successors, (1500), 10 states have internal predecessors, (1500), 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) [2022-10-17 10:29:05,748 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 150.0) internal successors, (1500), 10 states have internal predecessors, (1500), 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) [2022-10-17 10:29:05,748 INFO L175 Difference]: Start difference. First operand has 138 places, 110 transitions, 242 flow. Second operand 9 states and 1098 transitions. [2022-10-17 10:29:05,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 102 transitions, 256 flow [2022-10-17 10:29:05,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 102 transitions, 252 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-10-17 10:29:05,755 INFO L231 Difference]: Finished difference. Result has 110 places, 98 transitions, 226 flow [2022-10-17 10:29:05,755 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=226, PETRI_PLACES=110, PETRI_TRANSITIONS=98} [2022-10-17 10:29:05,758 INFO L287 CegarLoopForPetriNet]: 136 programPoint places, -26 predicate places. [2022-10-17 10:29:05,758 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 98 transitions, 226 flow [2022-10-17 10:29:05,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 122.3) internal successors, (1223), 10 states have internal predecessors, (1223), 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) [2022-10-17 10:29:05,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:05,762 INFO L208 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] [2022-10-17 10:29:05,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:29:05,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:29:05,986 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:29:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:05,987 INFO L85 PathProgramCache]: Analyzing trace with hash 210109917, now seen corresponding path program 1 times [2022-10-17 10:29:05,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:05,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304071180] [2022-10-17 10:29:05,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:05,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:29:06,014 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:29:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:29:06,052 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:29:06,052 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:29:06,052 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-10-17 10:29:06,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-10-17 10:29:06,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:29:06,053 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-10-17 10:29:06,054 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:29:06,054 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-10-17 10:29:06,093 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-10-17 10:29:06,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 400 flow [2022-10-17 10:29:06,183 INFO L130 PetriNetUnfolder]: 50/391 cut-off events. [2022-10-17 10:29:06,183 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-10-17 10:29:06,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 391 events. 50/391 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1357 event pairs, 1 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 265. Up to 16 conditions per place. [2022-10-17 10:29:06,189 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 185 transitions, 400 flow [2022-10-17 10:29:06,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 185 transitions, 400 flow [2022-10-17 10:29:06,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:29:06,202 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;@197e72ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:29:06,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 10:29:06,223 INFO L130 PetriNetUnfolder]: 4/85 cut-off events. [2022-10-17 10:29:06,223 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:29:06,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:06,223 INFO L208 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] [2022-10-17 10:29:06,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:29:06,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:06,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1164806739, now seen corresponding path program 1 times [2022-10-17 10:29:06,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:06,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757054016] [2022-10-17 10:29:06,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:06,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:06,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:06,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757054016] [2022-10-17 10:29:06,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757054016] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:06,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:06,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:29:06,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128952099] [2022-10-17 10:29:06,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:06,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:29:06,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:06,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:29:06,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:29:06,303 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 185 [2022-10-17 10:29:06,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 185 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 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) [2022-10-17 10:29:06,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:06,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 185 [2022-10-17 10:29:06,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:29:06,411 INFO L130 PetriNetUnfolder]: 7/323 cut-off events. [2022-10-17 10:29:06,411 INFO L131 PetriNetUnfolder]: For 61/107 co-relation queries the response was YES. [2022-10-17 10:29:06,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 323 events. 7/323 cut-off events. For 61/107 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1015 event pairs, 1 based on Foata normal form. 175/484 useless extension candidates. Maximal degree in co-relation 237. Up to 30 conditions per place. [2022-10-17 10:29:06,414 INFO L137 encePairwiseOnDemand]: 159/185 looper letters, 12 selfloop transitions, 2 changer transitions 24/165 dead transitions. [2022-10-17 10:29:06,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 165 transitions, 394 flow [2022-10-17 10:29:06,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:29:06,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:29:06,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2022-10-17 10:29:06,417 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8864864864864865 [2022-10-17 10:29:06,417 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2022-10-17 10:29:06,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2022-10-17 10:29:06,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:29:06,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2022-10-17 10:29:06,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 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) [2022-10-17 10:29:06,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2022-10-17 10:29:06,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2022-10-17 10:29:06,422 INFO L175 Difference]: Start difference. First operand has 166 places, 185 transitions, 400 flow. Second operand 3 states and 492 transitions. [2022-10-17 10:29:06,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 165 transitions, 394 flow [2022-10-17 10:29:06,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 165 transitions, 394 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:29:06,431 INFO L231 Difference]: Finished difference. Result has 168 places, 138 transitions, 307 flow [2022-10-17 10:29:06,431 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=307, PETRI_PLACES=168, PETRI_TRANSITIONS=138} [2022-10-17 10:29:06,433 INFO L287 CegarLoopForPetriNet]: 166 programPoint places, 2 predicate places. [2022-10-17 10:29:06,433 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 138 transitions, 307 flow [2022-10-17 10:29:06,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 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) [2022-10-17 10:29:06,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:06,439 INFO L208 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] [2022-10-17 10:29:06,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:29:06,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:29:06,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:06,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1762072419, now seen corresponding path program 1 times [2022-10-17 10:29:06,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:06,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118619215] [2022-10-17 10:29:06,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:06,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:06,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:06,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118619215] [2022-10-17 10:29:06,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118619215] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:29:06,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075865658] [2022-10-17 10:29:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:06,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:29:06,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:29:06,574 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:29:06,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:29:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:06,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:29:06,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:29:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:06,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:29:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:06,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075865658] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:29:06,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:29:06,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-10-17 10:29:06,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550718807] [2022-10-17 10:29:06,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:29:06,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:29:06,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:06,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:29:06,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:29:06,743 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 185 [2022-10-17 10:29:06,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 138 transitions, 307 flow. Second operand has 10 states, 10 states have (on average 149.3) internal successors, (1493), 10 states have internal predecessors, (1493), 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) [2022-10-17 10:29:06,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:06,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 185 [2022-10-17 10:29:06,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:29:06,848 INFO L130 PetriNetUnfolder]: 0/159 cut-off events. [2022-10-17 10:29:06,848 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-10-17 10:29:06,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 159 events. 0/159 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 260 event pairs, 0 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-10-17 10:29:06,849 INFO L137 encePairwiseOnDemand]: 179/185 looper letters, 13 selfloop transitions, 9 changer transitions 0/148 dead transitions. [2022-10-17 10:29:06,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 148 transitions, 373 flow [2022-10-17 10:29:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:29:06,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-10-17 10:29:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1347 transitions. [2022-10-17 10:29:06,854 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.809009009009009 [2022-10-17 10:29:06,855 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1347 transitions. [2022-10-17 10:29:06,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1347 transitions. [2022-10-17 10:29:06,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:29:06,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1347 transitions. [2022-10-17 10:29:06,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 149.66666666666666) internal successors, (1347), 9 states have internal predecessors, (1347), 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) [2022-10-17 10:29:06,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 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) [2022-10-17 10:29:06,867 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 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) [2022-10-17 10:29:06,867 INFO L175 Difference]: Start difference. First operand has 168 places, 138 transitions, 307 flow. Second operand 9 states and 1347 transitions. [2022-10-17 10:29:06,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 148 transitions, 373 flow [2022-10-17 10:29:06,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 148 transitions, 365 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-10-17 10:29:06,872 INFO L231 Difference]: Finished difference. Result has 157 places, 144 transitions, 349 flow [2022-10-17 10:29:06,873 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=349, PETRI_PLACES=157, PETRI_TRANSITIONS=144} [2022-10-17 10:29:06,887 INFO L287 CegarLoopForPetriNet]: 166 programPoint places, -9 predicate places. [2022-10-17 10:29:06,887 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 144 transitions, 349 flow [2022-10-17 10:29:06,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 149.3) internal successors, (1493), 10 states have internal predecessors, (1493), 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) [2022-10-17 10:29:06,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:06,888 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 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] [2022-10-17 10:29:06,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:29:07,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 10:29:07,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:29:07,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:07,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1592736104, now seen corresponding path program 1 times [2022-10-17 10:29:07,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:07,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442644993] [2022-10-17 10:29:07,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:07,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:29:07,121 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:29:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:29:07,144 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:29:07,144 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:29:07,144 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-10-17 10:29:07,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-10-17 10:29:07,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:29:07,145 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-10-17 10:29:07,145 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:29:07,145 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-10-17 10:29:07,172 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-10-17 10:29:07,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 220 transitions, 484 flow [2022-10-17 10:29:07,296 INFO L130 PetriNetUnfolder]: 81/593 cut-off events. [2022-10-17 10:29:07,296 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-10-17 10:29:07,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 593 events. 81/593 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2370 event pairs, 6 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 411. Up to 32 conditions per place. [2022-10-17 10:29:07,306 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 220 transitions, 484 flow [2022-10-17 10:29:07,314 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 196 places, 220 transitions, 484 flow [2022-10-17 10:29:07,315 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:29:07,316 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;@197e72ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:29:07,316 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 10:29:07,325 INFO L130 PetriNetUnfolder]: 6/94 cut-off events. [2022-10-17 10:29:07,326 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:29:07,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:07,326 INFO L208 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] [2022-10-17 10:29:07,326 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:29:07,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:07,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1314222096, now seen corresponding path program 1 times [2022-10-17 10:29:07,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:07,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342584538] [2022-10-17 10:29:07,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:07,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:07,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:07,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342584538] [2022-10-17 10:29:07,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342584538] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:07,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:07,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:29:07,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982710783] [2022-10-17 10:29:07,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:07,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:29:07,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:07,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:29:07,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:29:07,369 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 220 [2022-10-17 10:29:07,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 220 transitions, 484 flow. Second operand has 2 states, 2 states have (on average 182.5) internal successors, (365), 2 states have internal predecessors, (365), 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) [2022-10-17 10:29:07,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:07,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 220 [2022-10-17 10:29:07,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:29:07,537 INFO L130 PetriNetUnfolder]: 21/528 cut-off events. [2022-10-17 10:29:07,538 INFO L131 PetriNetUnfolder]: For 126/142 co-relation queries the response was YES. [2022-10-17 10:29:07,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 528 events. 21/528 cut-off events. For 126/142 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2147 event pairs, 6 based on Foata normal form. 248/750 useless extension candidates. Maximal degree in co-relation 380. Up to 37 conditions per place. [2022-10-17 10:29:07,543 INFO L137 encePairwiseOnDemand]: 191/220 looper letters, 4 selfloop transitions, 0 changer transitions 25/190 dead transitions. [2022-10-17 10:29:07,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 190 transitions, 440 flow [2022-10-17 10:29:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:29:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-10-17 10:29:07,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 401 transitions. [2022-10-17 10:29:07,546 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9113636363636364 [2022-10-17 10:29:07,546 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 401 transitions. [2022-10-17 10:29:07,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 401 transitions. [2022-10-17 10:29:07,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:29:07,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 401 transitions. [2022-10-17 10:29:07,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 200.5) internal successors, (401), 2 states have internal predecessors, (401), 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) [2022-10-17 10:29:07,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 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) [2022-10-17 10:29:07,550 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 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) [2022-10-17 10:29:07,550 INFO L175 Difference]: Start difference. First operand has 196 places, 220 transitions, 484 flow. Second operand 2 states and 401 transitions. [2022-10-17 10:29:07,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 190 transitions, 440 flow [2022-10-17 10:29:07,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 190 transitions, 440 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:29:07,556 INFO L231 Difference]: Finished difference. Result has 196 places, 165 transitions, 362 flow [2022-10-17 10:29:07,557 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=362, PETRI_PLACES=196, PETRI_TRANSITIONS=165} [2022-10-17 10:29:07,559 INFO L287 CegarLoopForPetriNet]: 196 programPoint places, 0 predicate places. [2022-10-17 10:29:07,559 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 165 transitions, 362 flow [2022-10-17 10:29:07,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 182.5) internal successors, (365), 2 states have internal predecessors, (365), 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) [2022-10-17 10:29:07,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:07,560 INFO L208 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] [2022-10-17 10:29:07,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 10:29:07,560 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:29:07,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:07,560 INFO L85 PathProgramCache]: Analyzing trace with hash 808663471, now seen corresponding path program 1 times [2022-10-17 10:29:07,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:07,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556159415] [2022-10-17 10:29:07,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:07,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:07,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:07,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556159415] [2022-10-17 10:29:07,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556159415] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:07,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:07,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:29:07,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760706587] [2022-10-17 10:29:07,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:07,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:29:07,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:07,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:29:07,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:29:07,614 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 220 [2022-10-17 10:29:07,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 165 transitions, 362 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 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) [2022-10-17 10:29:07,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:07,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 220 [2022-10-17 10:29:07,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:29:07,687 INFO L130 PetriNetUnfolder]: 0/238 cut-off events. [2022-10-17 10:29:07,687 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-10-17 10:29:07,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 238 events. 0/238 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 628 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-10-17 10:29:07,688 INFO L137 encePairwiseOnDemand]: 217/220 looper letters, 13 selfloop transitions, 2 changer transitions 0/169 dead transitions. [2022-10-17 10:29:07,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 169 transitions, 400 flow [2022-10-17 10:29:07,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:29:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:29:07,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2022-10-17 10:29:07,692 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8196969696969697 [2022-10-17 10:29:07,692 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2022-10-17 10:29:07,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2022-10-17 10:29:07,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:29:07,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2022-10-17 10:29:07,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 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) [2022-10-17 10:29:07,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 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) [2022-10-17 10:29:07,697 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 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) [2022-10-17 10:29:07,697 INFO L175 Difference]: Start difference. First operand has 196 places, 165 transitions, 362 flow. Second operand 3 states and 541 transitions. [2022-10-17 10:29:07,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 169 transitions, 400 flow [2022-10-17 10:29:07,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 169 transitions, 388 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-10-17 10:29:07,703 INFO L231 Difference]: Finished difference. Result has 178 places, 166 transitions, 362 flow [2022-10-17 10:29:07,704 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=362, PETRI_PLACES=178, PETRI_TRANSITIONS=166} [2022-10-17 10:29:07,704 INFO L287 CegarLoopForPetriNet]: 196 programPoint places, -18 predicate places. [2022-10-17 10:29:07,705 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 166 transitions, 362 flow [2022-10-17 10:29:07,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 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) [2022-10-17 10:29:07,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:07,706 INFO L208 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] [2022-10-17 10:29:07,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 10:29:07,707 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:29:07,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:07,707 INFO L85 PathProgramCache]: Analyzing trace with hash -587956040, now seen corresponding path program 1 times [2022-10-17 10:29:07,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:07,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065676942] [2022-10-17 10:29:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:07,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:07,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:07,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:07,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065676942] [2022-10-17 10:29:07,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065676942] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:29:07,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531607075] [2022-10-17 10:29:07,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:07,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:29:07,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:29:07,814 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:29:07,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:29:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:07,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:29:07,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:29:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:07,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:29:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:07,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531607075] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:29:07,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:29:07,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-10-17 10:29:07,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226192204] [2022-10-17 10:29:07,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:29:07,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:29:07,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:07,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:29:07,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:29:07,986 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 220 [2022-10-17 10:29:07,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 166 transitions, 362 flow. Second operand has 10 states, 10 states have (on average 176.3) internal successors, (1763), 10 states have internal predecessors, (1763), 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) [2022-10-17 10:29:07,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:07,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 220 [2022-10-17 10:29:07,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:29:08,117 INFO L130 PetriNetUnfolder]: 0/210 cut-off events. [2022-10-17 10:29:08,117 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-10-17 10:29:08,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 210 events. 0/210 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 459 event pairs, 0 based on Foata normal form. 2/212 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-10-17 10:29:08,118 INFO L137 encePairwiseOnDemand]: 214/220 looper letters, 14 selfloop transitions, 9 changer transitions 0/176 dead transitions. [2022-10-17 10:29:08,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 176 transitions, 430 flow [2022-10-17 10:29:08,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:29:08,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-10-17 10:29:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1591 transitions. [2022-10-17 10:29:08,124 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8035353535353535 [2022-10-17 10:29:08,124 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1591 transitions. [2022-10-17 10:29:08,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1591 transitions. [2022-10-17 10:29:08,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:29:08,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1591 transitions. [2022-10-17 10:29:08,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 176.77777777777777) internal successors, (1591), 9 states have internal predecessors, (1591), 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) [2022-10-17 10:29:08,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 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) [2022-10-17 10:29:08,150 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 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) [2022-10-17 10:29:08,150 INFO L175 Difference]: Start difference. First operand has 178 places, 166 transitions, 362 flow. Second operand 9 states and 1591 transitions. [2022-10-17 10:29:08,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 176 transitions, 430 flow [2022-10-17 10:29:08,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 176 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 10:29:08,156 INFO L231 Difference]: Finished difference. Result has 188 places, 172 transitions, 410 flow [2022-10-17 10:29:08,156 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=410, PETRI_PLACES=188, PETRI_TRANSITIONS=172} [2022-10-17 10:29:08,158 INFO L287 CegarLoopForPetriNet]: 196 programPoint places, -8 predicate places. [2022-10-17 10:29:08,158 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 172 transitions, 410 flow [2022-10-17 10:29:08,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 176.3) internal successors, (1763), 10 states have internal predecessors, (1763), 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) [2022-10-17 10:29:08,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:08,159 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-10-17 10:29:08,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:29:08,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-17 10:29:08,382 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:29:08,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:08,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1706824039, now seen corresponding path program 1 times [2022-10-17 10:29:08,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:08,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511214218] [2022-10-17 10:29:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:08,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-10-17 10:29:08,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:08,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511214218] [2022-10-17 10:29:08,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511214218] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:08,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:08,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:29:08,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371272768] [2022-10-17 10:29:08,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:08,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:29:08,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:08,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:29:08,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:29:08,559 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 220 [2022-10-17 10:29:08,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 172 transitions, 410 flow. Second operand has 5 states, 5 states have (on average 161.6) internal successors, (808), 5 states have internal predecessors, (808), 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) [2022-10-17 10:29:08,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:08,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 220 [2022-10-17 10:29:08,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:29:18,001 INFO L130 PetriNetUnfolder]: 16742/44787 cut-off events. [2022-10-17 10:29:18,002 INFO L131 PetriNetUnfolder]: For 475/475 co-relation queries the response was YES. [2022-10-17 10:29:18,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67978 conditions, 44787 events. 16742/44787 cut-off events. For 475/475 co-relation queries the response was YES. Maximal size of possible extension queue 1798. Compared 566073 event pairs, 9176 based on Foata normal form. 750/44882 useless extension candidates. Maximal degree in co-relation 67967. Up to 14189 conditions per place. [2022-10-17 10:29:18,537 INFO L137 encePairwiseOnDemand]: 212/220 looper letters, 31 selfloop transitions, 5 changer transitions 53/236 dead transitions. [2022-10-17 10:29:18,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 236 transitions, 731 flow [2022-10-17 10:29:18,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:29:18,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-10-17 10:29:18,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1211 transitions. [2022-10-17 10:29:18,542 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7863636363636364 [2022-10-17 10:29:18,542 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1211 transitions. [2022-10-17 10:29:18,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1211 transitions. [2022-10-17 10:29:18,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:29:18,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1211 transitions. [2022-10-17 10:29:18,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 173.0) internal successors, (1211), 7 states have internal predecessors, (1211), 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) [2022-10-17 10:29:18,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 220.0) internal successors, (1760), 8 states have internal predecessors, (1760), 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) [2022-10-17 10:29:18,554 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 220.0) internal successors, (1760), 8 states have internal predecessors, (1760), 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) [2022-10-17 10:29:18,554 INFO L175 Difference]: Start difference. First operand has 188 places, 172 transitions, 410 flow. Second operand 7 states and 1211 transitions. [2022-10-17 10:29:18,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 236 transitions, 731 flow [2022-10-17 10:29:18,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 236 transitions, 725 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-10-17 10:29:18,562 INFO L231 Difference]: Finished difference. Result has 198 places, 176 transitions, 461 flow [2022-10-17 10:29:18,562 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=461, PETRI_PLACES=198, PETRI_TRANSITIONS=176} [2022-10-17 10:29:18,564 INFO L287 CegarLoopForPetriNet]: 196 programPoint places, 2 predicate places. [2022-10-17 10:29:18,564 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 176 transitions, 461 flow [2022-10-17 10:29:18,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 161.6) internal successors, (808), 5 states have internal predecessors, (808), 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) [2022-10-17 10:29:18,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:18,566 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:18,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-17 10:29:18,566 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:29:18,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:18,567 INFO L85 PathProgramCache]: Analyzing trace with hash 382849206, now seen corresponding path program 1 times [2022-10-17 10:29:18,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:18,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805336743] [2022-10-17 10:29:18,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:18,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:29:18,603 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:29:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:29:18,652 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:29:18,655 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:29:18,655 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-10-17 10:29:18,656 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-10-17 10:29:18,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-17 10:29:18,656 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-10-17 10:29:18,658 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:29:18,658 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-10-17 10:29:18,700 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-10-17 10:29:18,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 255 transitions, 570 flow [2022-10-17 10:29:18,887 INFO L130 PetriNetUnfolder]: 140/935 cut-off events. [2022-10-17 10:29:18,887 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-10-17 10:29:18,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1046 conditions, 935 events. 140/935 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4364 event pairs, 23 based on Foata normal form. 0/805 useless extension candidates. Maximal degree in co-relation 638. Up to 80 conditions per place. [2022-10-17 10:29:18,905 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 255 transitions, 570 flow [2022-10-17 10:29:18,913 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 255 transitions, 570 flow [2022-10-17 10:29:18,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:29:18,918 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;@197e72ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:29:18,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 10:29:18,925 INFO L130 PetriNetUnfolder]: 6/94 cut-off events. [2022-10-17 10:29:18,925 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:29:18,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:18,926 INFO L208 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] [2022-10-17 10:29:18,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:29:18,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:18,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1458783922, now seen corresponding path program 1 times [2022-10-17 10:29:18,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:18,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633880494] [2022-10-17 10:29:18,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:18,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:18,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:18,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633880494] [2022-10-17 10:29:18,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633880494] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:18,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:18,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:29:18,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356794493] [2022-10-17 10:29:18,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:18,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:29:18,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:18,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:29:18,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:29:18,971 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 255 [2022-10-17 10:29:18,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 255 transitions, 570 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) [2022-10-17 10:29:18,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:18,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 255 [2022-10-17 10:29:18,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:29:19,205 INFO L130 PetriNetUnfolder]: 53/821 cut-off events. [2022-10-17 10:29:19,205 INFO L131 PetriNetUnfolder]: For 302/421 co-relation queries the response was YES. [2022-10-17 10:29:19,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 821 events. 53/821 cut-off events. For 302/421 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3965 event pairs, 23 based on Foata normal form. 831/1610 useless extension candidates. Maximal degree in co-relation 620. Up to 110 conditions per place. [2022-10-17 10:29:19,216 INFO L137 encePairwiseOnDemand]: 217/255 looper letters, 14 selfloop transitions, 2 changer transitions 26/223 dead transitions. [2022-10-17 10:29:19,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 223 transitions, 548 flow [2022-10-17 10:29:19,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:29:19,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:29:19,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 670 transitions. [2022-10-17 10:29:19,220 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8758169934640523 [2022-10-17 10:29:19,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 670 transitions. [2022-10-17 10:29:19,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 670 transitions. [2022-10-17 10:29:19,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:29:19,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 670 transitions. [2022-10-17 10:29:19,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 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) [2022-10-17 10:29:19,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:29:19,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:29:19,226 INFO L175 Difference]: Start difference. First operand has 226 places, 255 transitions, 570 flow. Second operand 3 states and 670 transitions. [2022-10-17 10:29:19,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 223 transitions, 548 flow [2022-10-17 10:29:19,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 223 transitions, 548 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:29:19,233 INFO L231 Difference]: Finished difference. Result has 228 places, 194 transitions, 443 flow [2022-10-17 10:29:19,235 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=443, PETRI_PLACES=228, PETRI_TRANSITIONS=194} [2022-10-17 10:29:19,236 INFO L287 CegarLoopForPetriNet]: 226 programPoint places, 2 predicate places. [2022-10-17 10:29:19,236 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 194 transitions, 443 flow [2022-10-17 10:29:19,237 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) [2022-10-17 10:29:19,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:19,237 INFO L208 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] [2022-10-17 10:29:19,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-17 10:29:19,237 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:29:19,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:19,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1766140106, now seen corresponding path program 1 times [2022-10-17 10:29:19,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:19,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723473644] [2022-10-17 10:29:19,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:19,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:19,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:19,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723473644] [2022-10-17 10:29:19,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723473644] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:29:19,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069944340] [2022-10-17 10:29:19,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:19,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:29:19,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:29:19,327 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:29:19,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:29:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:19,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:29:19,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:29:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:19,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:29:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:19,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069944340] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:29:19,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:29:19,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-10-17 10:29:19,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839717240] [2022-10-17 10:29:19,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:29:19,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:29:19,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:19,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:29:19,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:29:19,614 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 255 [2022-10-17 10:29:19,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 194 transitions, 443 flow. Second operand has 10 states, 10 states have (on average 203.3) internal successors, (2033), 10 states have internal predecessors, (2033), 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) [2022-10-17 10:29:19,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:19,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 255 [2022-10-17 10:29:19,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:29:19,744 INFO L130 PetriNetUnfolder]: 0/261 cut-off events. [2022-10-17 10:29:19,745 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-10-17 10:29:19,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 261 events. 0/261 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 657 event pairs, 0 based on Foata normal form. 2/263 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-10-17 10:29:19,746 INFO L137 encePairwiseOnDemand]: 249/255 looper letters, 15 selfloop transitions, 9 changer transitions 0/204 dead transitions. [2022-10-17 10:29:19,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 204 transitions, 513 flow [2022-10-17 10:29:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:29:19,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-10-17 10:29:19,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1835 transitions. [2022-10-17 10:29:19,752 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7995642701525054 [2022-10-17 10:29:19,752 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1835 transitions. [2022-10-17 10:29:19,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1835 transitions. [2022-10-17 10:29:19,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:29:19,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1835 transitions. [2022-10-17 10:29:19,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 203.88888888888889) internal successors, (1835), 9 states have internal predecessors, (1835), 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) [2022-10-17 10:29:19,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 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) [2022-10-17 10:29:19,767 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 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) [2022-10-17 10:29:19,767 INFO L175 Difference]: Start difference. First operand has 228 places, 194 transitions, 443 flow. Second operand 9 states and 1835 transitions. [2022-10-17 10:29:19,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 204 transitions, 513 flow [2022-10-17 10:29:19,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 204 transitions, 491 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-10-17 10:29:19,774 INFO L231 Difference]: Finished difference. Result has 217 places, 200 transitions, 471 flow [2022-10-17 10:29:19,775 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=471, PETRI_PLACES=217, PETRI_TRANSITIONS=200} [2022-10-17 10:29:19,775 INFO L287 CegarLoopForPetriNet]: 226 programPoint places, -9 predicate places. [2022-10-17 10:29:19,775 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 200 transitions, 471 flow [2022-10-17 10:29:19,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 203.3) internal successors, (2033), 10 states have internal predecessors, (2033), 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) [2022-10-17 10:29:19,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:29:19,777 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-10-17 10:29:19,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:29:19,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6720d9e2-1171-42de-bffe-7ce8aca4a9eb/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:29:19,998 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:29:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:19,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1937188195, now seen corresponding path program 1 times [2022-10-17 10:29:19,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:19,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814157274] [2022-10-17 10:29:19,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:19,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-10-17 10:29:20,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:20,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814157274] [2022-10-17 10:29:20,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814157274] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:20,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:20,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:29:20,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136510029] [2022-10-17 10:29:20,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:20,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:29:20,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:20,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:29:20,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:29:20,152 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 255 [2022-10-17 10:29:20,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 200 transitions, 471 flow. Second operand has 5 states, 5 states have (on average 184.6) internal successors, (923), 5 states have internal predecessors, (923), 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) [2022-10-17 10:29:20,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:29:20,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 255 [2022-10-17 10:29:20,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand