./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 16:24:59,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:24:59,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:24:59,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:24:59,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:24:59,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:24:59,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:24:59,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:24:59,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:24:59,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:24:59,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:24:59,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:24:59,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:24:59,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:24:59,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:24:59,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:24:59,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:24:59,961 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:24:59,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:24:59,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:24:59,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:24:59,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:24:59,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:24:59,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:24:59,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:24:59,979 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:24:59,979 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:24:59,981 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:24:59,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:24:59,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:24:59,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:24:59,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:24:59,986 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:24:59,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:24:59,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:24:59,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:24:59,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:24:59,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:24:59,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:24:59,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:24:59,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:24:59,995 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:25:00,023 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:25:00,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:25:00,024 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:25:00,024 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:25:00,025 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:25:00,026 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:25:00,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:25:00,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:25:00,027 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:25:00,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:25:00,028 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:25:00,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:25:00,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:25:00,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:25:00,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:25:00,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:25:00,030 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:25:00,031 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:25:00,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:25:00,031 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:25:00,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:25:00,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:25:00,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:25:00,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:25:00,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:25:00,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:25:00,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:25:00,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:25:00,034 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:25:00,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:25:00,035 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:25:00,035 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:25:00,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:25:00,035 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_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f [2022-11-21 16:25:00,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:25:00,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:25:00,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:25:00,375 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:25:00,376 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:25:00,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2022-11-21 16:25:03,806 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:25:04,120 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:25:04,121 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2022-11-21 16:25:04,163 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/data/84eedad6f/68d9eaa3f38f4fc2913e5376f01b29f9/FLAG9bb37c11e [2022-11-21 16:25:04,179 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/data/84eedad6f/68d9eaa3f38f4fc2913e5376f01b29f9 [2022-11-21 16:25:04,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:25:04,184 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:25:04,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:25:04,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:25:04,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:25:04,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:25:04" (1/1) ... [2022-11-21 16:25:04,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@495fdcbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:25:04, skipping insertion in model container [2022-11-21 16:25:04,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:25:04" (1/1) ... [2022-11-21 16:25:04,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:25:04,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:25:04,755 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2022-11-21 16:25:04,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:25:04,778 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:25:04,816 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2022-11-21 16:25:04,820 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:25:04,868 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:25:04,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:25:04 WrapperNode [2022-11-21 16:25:04,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:25:04,871 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:25:04,871 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:25:04,871 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:25:04,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:25:04" (1/1) ... [2022-11-21 16:25:04,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:25:04" (1/1) ... [2022-11-21 16:25:04,946 INFO L138 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 83 [2022-11-21 16:25:04,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:25:04,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:25:04,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:25:04,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:25:04,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:25:04" (1/1) ... [2022-11-21 16:25:04,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:25:04" (1/1) ... [2022-11-21 16:25:04,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:25:04" (1/1) ... [2022-11-21 16:25:04,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:25:04" (1/1) ... [2022-11-21 16:25:04,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:25:04" (1/1) ... [2022-11-21 16:25:04,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:25:04" (1/1) ... [2022-11-21 16:25:04,990 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:25:04" (1/1) ... [2022-11-21 16:25:04,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:25:04" (1/1) ... [2022-11-21 16:25:05,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:25:05,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:25:05,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:25:05,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:25:05,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:25:04" (1/1) ... [2022-11-21 16:25:05,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:25:05,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:25:05,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:25:05,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:25:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-11-21 16:25:05,116 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-11-21 16:25:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-21 16:25:05,117 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-21 16:25:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:25:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:25:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:25:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:25:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:25:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:25:05,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:25:05,121 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:25:05,274 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:25:05,277 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:25:05,466 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:25:05,552 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:25:05,553 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 16:25:05,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:25:05 BoogieIcfgContainer [2022-11-21 16:25:05,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:25:05,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:25:05,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:25:05,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:25:05,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:25:04" (1/3) ... [2022-11-21 16:25:05,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581c3a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:25:05, skipping insertion in model container [2022-11-21 16:25:05,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:25:04" (2/3) ... [2022-11-21 16:25:05,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581c3a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:25:05, skipping insertion in model container [2022-11-21 16:25:05,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:25:05" (3/3) ... [2022-11-21 16:25:05,568 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2022-11-21 16:25:05,579 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:25:05,597 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:25:05,597 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:25:05,598 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:25:05,755 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 16:25:05,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 65 transitions, 140 flow [2022-11-21 16:25:05,861 INFO L130 PetriNetUnfolder]: 7/75 cut-off events. [2022-11-21 16:25:05,861 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:25:05,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 75 events. 7/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 115 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 56. Up to 4 conditions per place. [2022-11-21 16:25:05,868 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 65 transitions, 140 flow [2022-11-21 16:25:05,873 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 64 transitions, 136 flow [2022-11-21 16:25:05,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:25:05,893 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;@73a39d90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:25:05,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-21 16:25:05,911 INFO L130 PetriNetUnfolder]: 3/39 cut-off events. [2022-11-21 16:25:05,911 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:25:05,911 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:05,912 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:05,913 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:25:05,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:05,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1602056178, now seen corresponding path program 1 times [2022-11-21 16:25:05,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:05,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272104556] [2022-11-21 16:25:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:05,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:25:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:06,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:25:06,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272104556] [2022-11-21 16:25:06,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272104556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:25:06,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:25:06,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:25:06,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647440940] [2022-11-21 16:25:06,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:25:06,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:25:06,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:25:06,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:25:06,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:25:06,485 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 65 [2022-11-21 16:25:06,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:06,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:25:06,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 65 [2022-11-21 16:25:06,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:25:06,697 INFO L130 PetriNetUnfolder]: 56/168 cut-off events. [2022-11-21 16:25:06,697 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-21 16:25:06,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 168 events. 56/168 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 468 event pairs, 12 based on Foata normal form. 94/255 useless extension candidates. Maximal degree in co-relation 263. Up to 56 conditions per place. [2022-11-21 16:25:06,702 INFO L137 encePairwiseOnDemand]: 52/65 looper letters, 21 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2022-11-21 16:25:06,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 184 flow [2022-11-21 16:25:06,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:25:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:25:06,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2022-11-21 16:25:06,720 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8246153846153846 [2022-11-21 16:25:06,721 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 268 transitions. [2022-11-21 16:25:06,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 268 transitions. [2022-11-21 16:25:06,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:25:06,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 268 transitions. [2022-11-21 16:25:06,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 53.6) internal successors, (268), 5 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:06,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:06,738 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:06,741 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 136 flow. Second operand 5 states and 268 transitions. [2022-11-21 16:25:06,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 184 flow [2022-11-21 16:25:06,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:25:06,750 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 141 flow [2022-11-21 16:25:06,752 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2022-11-21 16:25:06,757 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, -7 predicate places. [2022-11-21 16:25:06,757 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 141 flow [2022-11-21 16:25:06,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:06,758 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:06,759 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:06,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:25:06,760 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:25:06,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:06,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1782947143, now seen corresponding path program 1 times [2022-11-21 16:25:06,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:06,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091418590] [2022-11-21 16:25:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:06,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:25:06,815 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:25:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:25:06,902 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:25:06,902 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:25:06,905 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-21 16:25:06,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-21 16:25:06,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-11-21 16:25:06,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-21 16:25:06,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:25:06,914 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-21 16:25:06,926 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 16:25:06,927 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-21 16:25:06,988 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 16:25:06,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 92 transitions, 208 flow [2022-11-21 16:25:07,034 INFO L130 PetriNetUnfolder]: 10/101 cut-off events. [2022-11-21 16:25:07,034 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 16:25:07,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 101 events. 10/101 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 174 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2022-11-21 16:25:07,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 92 transitions, 208 flow [2022-11-21 16:25:07,038 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 77 transitions, 169 flow [2022-11-21 16:25:07,044 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:25:07,045 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;@73a39d90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:25:07,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-21 16:25:07,056 INFO L130 PetriNetUnfolder]: 3/40 cut-off events. [2022-11-21 16:25:07,056 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:25:07,056 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:07,057 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:07,057 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:25:07,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:07,058 INFO L85 PathProgramCache]: Analyzing trace with hash 90548252, now seen corresponding path program 1 times [2022-11-21 16:25:07,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:07,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315423057] [2022-11-21 16:25:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:07,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:25:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:07,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:25:07,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315423057] [2022-11-21 16:25:07,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315423057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:25:07,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:25:07,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:25:07,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737904206] [2022-11-21 16:25:07,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:25:07,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:25:07,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:25:07,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:25:07,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:25:07,174 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 92 [2022-11-21 16:25:07,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:07,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:25:07,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 92 [2022-11-21 16:25:07,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:25:07,558 INFO L130 PetriNetUnfolder]: 740/1312 cut-off events. [2022-11-21 16:25:07,558 INFO L131 PetriNetUnfolder]: For 161/161 co-relation queries the response was YES. [2022-11-21 16:25:07,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2596 conditions, 1312 events. 740/1312 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7286 event pairs, 122 based on Foata normal form. 768/2032 useless extension candidates. Maximal degree in co-relation 2564. Up to 667 conditions per place. [2022-11-21 16:25:07,583 INFO L137 encePairwiseOnDemand]: 75/92 looper letters, 34 selfloop transitions, 9 changer transitions 0/80 dead transitions. [2022-11-21 16:25:07,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 80 transitions, 271 flow [2022-11-21 16:25:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:25:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:25:07,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 340 transitions. [2022-11-21 16:25:07,594 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7391304347826086 [2022-11-21 16:25:07,594 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 340 transitions. [2022-11-21 16:25:07,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 340 transitions. [2022-11-21 16:25:07,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:25:07,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 340 transitions. [2022-11-21 16:25:07,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:07,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:07,609 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:07,609 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 169 flow. Second operand 5 states and 340 transitions. [2022-11-21 16:25:07,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 80 transitions, 271 flow [2022-11-21 16:25:07,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 268 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-21 16:25:07,618 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 186 flow [2022-11-21 16:25:07,618 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2022-11-21 16:25:07,621 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -10 predicate places. [2022-11-21 16:25:07,626 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 186 flow [2022-11-21 16:25:07,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:07,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:07,627 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:07,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:25:07,627 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:25:07,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:07,629 INFO L85 PathProgramCache]: Analyzing trace with hash -965967294, now seen corresponding path program 1 times [2022-11-21 16:25:07,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:07,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125507865] [2022-11-21 16:25:07,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:07,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:25:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:07,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:25:07,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125507865] [2022-11-21 16:25:07,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125507865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:25:07,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:25:07,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:25:07,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196219905] [2022-11-21 16:25:07,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:25:07,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:25:07,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:25:07,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:25:07,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:25:07,889 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 92 [2022-11-21 16:25:07,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:07,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:25:07,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 92 [2022-11-21 16:25:07,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:25:07,977 INFO L130 PetriNetUnfolder]: 38/250 cut-off events. [2022-11-21 16:25:07,977 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-11-21 16:25:07,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 250 events. 38/250 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1091 event pairs, 6 based on Foata normal form. 46/295 useless extension candidates. Maximal degree in co-relation 392. Up to 50 conditions per place. [2022-11-21 16:25:07,979 INFO L137 encePairwiseOnDemand]: 86/92 looper letters, 6 selfloop transitions, 6 changer transitions 0/63 dead transitions. [2022-11-21 16:25:07,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 210 flow [2022-11-21 16:25:07,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:25:07,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:25:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2022-11-21 16:25:07,982 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7608695652173914 [2022-11-21 16:25:07,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2022-11-21 16:25:07,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2022-11-21 16:25:07,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:25:07,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2022-11-21 16:25:07,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:07,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:07,985 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:07,986 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 186 flow. Second operand 3 states and 210 transitions. [2022-11-21 16:25:07,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 210 flow [2022-11-21 16:25:07,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 63 transitions, 204 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-21 16:25:07,993 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 180 flow [2022-11-21 16:25:07,993 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2022-11-21 16:25:07,996 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -9 predicate places. [2022-11-21 16:25:07,997 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 180 flow [2022-11-21 16:25:07,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:07,998 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:07,998 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:07,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:25:08,000 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:25:08,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:08,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1614490504, now seen corresponding path program 1 times [2022-11-21 16:25:08,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:08,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577958253] [2022-11-21 16:25:08,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:08,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:25:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:08,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:25:08,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577958253] [2022-11-21 16:25:08,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577958253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:25:08,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:25:08,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:25:08,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674953025] [2022-11-21 16:25:08,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:25:08,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:25:08,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:25:08,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:25:08,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:25:08,333 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 92 [2022-11-21 16:25:08,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 180 flow. Second operand has 6 states, 6 states have (on average 53.166666666666664) internal successors, (319), 6 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:08,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:25:08,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 92 [2022-11-21 16:25:08,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:25:08,550 INFO L130 PetriNetUnfolder]: 91/341 cut-off events. [2022-11-21 16:25:08,550 INFO L131 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2022-11-21 16:25:08,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 341 events. 91/341 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1860 event pairs, 9 based on Foata normal form. 3/337 useless extension candidates. Maximal degree in co-relation 906. Up to 145 conditions per place. [2022-11-21 16:25:08,554 INFO L137 encePairwiseOnDemand]: 83/92 looper letters, 44 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2022-11-21 16:25:08,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 90 transitions, 410 flow [2022-11-21 16:25:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:25:08,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:25:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 408 transitions. [2022-11-21 16:25:08,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2022-11-21 16:25:08,557 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 408 transitions. [2022-11-21 16:25:08,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 408 transitions. [2022-11-21 16:25:08,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:25:08,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 408 transitions. [2022-11-21 16:25:08,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.285714285714285) internal successors, (408), 7 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:08,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:08,562 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:08,562 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 180 flow. Second operand 7 states and 408 transitions. [2022-11-21 16:25:08,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 90 transitions, 410 flow [2022-11-21 16:25:08,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 90 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:25:08,571 INFO L231 Difference]: Finished difference. Result has 76 places, 69 transitions, 258 flow [2022-11-21 16:25:08,571 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=258, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2022-11-21 16:25:08,574 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -1 predicate places. [2022-11-21 16:25:08,575 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 258 flow [2022-11-21 16:25:08,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.166666666666664) internal successors, (319), 6 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:08,575 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:08,576 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:08,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:25:08,577 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:25:08,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1827137551, now seen corresponding path program 1 times [2022-11-21 16:25:08,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:08,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106456137] [2022-11-21 16:25:08,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:08,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:25:08,618 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:25:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:25:08,656 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:25:08,656 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:25:08,661 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-21 16:25:08,662 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-21 16:25:08,662 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-11-21 16:25:08,662 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-21 16:25:08,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-21 16:25:08,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:25:08,663 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-21 16:25:08,664 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 16:25:08,664 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-21 16:25:08,723 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 16:25:08,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 280 flow [2022-11-21 16:25:08,748 INFO L130 PetriNetUnfolder]: 13/127 cut-off events. [2022-11-21 16:25:08,749 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-21 16:25:08,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 127 events. 13/127 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 228 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2022-11-21 16:25:08,750 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 119 transitions, 280 flow [2022-11-21 16:25:08,752 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 90 transitions, 204 flow [2022-11-21 16:25:08,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:25:08,759 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;@73a39d90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:25:08,759 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-21 16:25:08,763 INFO L130 PetriNetUnfolder]: 3/39 cut-off events. [2022-11-21 16:25:08,764 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:25:08,764 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:08,764 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:08,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-21 16:25:08,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:08,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1010684622, now seen corresponding path program 1 times [2022-11-21 16:25:08,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:08,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249241035] [2022-11-21 16:25:08,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:08,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:25:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:08,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:25:08,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249241035] [2022-11-21 16:25:08,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249241035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:25:08,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:25:08,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:25:08,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693547337] [2022-11-21 16:25:08,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:25:08,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:25:08,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:25:08,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:25:08,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:25:08,851 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 119 [2022-11-21 16:25:08,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 90 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:08,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:25:08,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 119 [2022-11-21 16:25:08,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:25:10,660 INFO L130 PetriNetUnfolder]: 6323/9886 cut-off events. [2022-11-21 16:25:10,660 INFO L131 PetriNetUnfolder]: For 2152/2152 co-relation queries the response was YES. [2022-11-21 16:25:10,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19896 conditions, 9886 events. 6323/9886 cut-off events. For 2152/2152 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 65986 event pairs, 1736 based on Foata normal form. 5068/14571 useless extension candidates. Maximal degree in co-relation 19863. Up to 5413 conditions per place. [2022-11-21 16:25:10,778 INFO L137 encePairwiseOnDemand]: 98/119 looper letters, 47 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2022-11-21 16:25:10,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 364 flow [2022-11-21 16:25:10,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:25:10,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:25:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 412 transitions. [2022-11-21 16:25:10,781 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.692436974789916 [2022-11-21 16:25:10,781 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 412 transitions. [2022-11-21 16:25:10,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 412 transitions. [2022-11-21 16:25:10,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:25:10,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 412 transitions. [2022-11-21 16:25:10,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.4) internal successors, (412), 5 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:10,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 119.0) internal successors, (714), 6 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:10,786 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 119.0) internal successors, (714), 6 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:10,786 INFO L175 Difference]: Start difference. First operand has 90 places, 90 transitions, 204 flow. Second operand 5 states and 412 transitions. [2022-11-21 16:25:10,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 364 flow [2022-11-21 16:25:10,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 99 transitions, 353 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-11-21 16:25:10,792 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 231 flow [2022-11-21 16:25:10,793 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2022-11-21 16:25:10,795 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, -13 predicate places. [2022-11-21 16:25:10,795 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 231 flow [2022-11-21 16:25:10,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:10,796 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:10,796 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:10,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:25:10,801 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-21 16:25:10,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:10,802 INFO L85 PathProgramCache]: Analyzing trace with hash -156069315, now seen corresponding path program 1 times [2022-11-21 16:25:10,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:10,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267764288] [2022-11-21 16:25:10,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:10,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:25:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:10,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:25:10,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267764288] [2022-11-21 16:25:10,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267764288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:25:10,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:25:10,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:25:10,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14394633] [2022-11-21 16:25:10,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:25:10,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:25:10,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:25:10,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:25:10,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:25:10,979 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 119 [2022-11-21 16:25:10,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 231 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:10,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:25:10,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 119 [2022-11-21 16:25:10,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:25:11,087 INFO L130 PetriNetUnfolder]: 146/567 cut-off events. [2022-11-21 16:25:11,087 INFO L131 PetriNetUnfolder]: For 194/194 co-relation queries the response was YES. [2022-11-21 16:25:11,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1147 conditions, 567 events. 146/567 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3229 event pairs, 16 based on Foata normal form. 225/787 useless extension candidates. Maximal degree in co-relation 1110. Up to 168 conditions per place. [2022-11-21 16:25:11,092 INFO L137 encePairwiseOnDemand]: 111/119 looper letters, 8 selfloop transitions, 8 changer transitions 0/75 dead transitions. [2022-11-21 16:25:11,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 75 transitions, 264 flow [2022-11-21 16:25:11,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:25:11,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:25:11,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2022-11-21 16:25:11,094 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7282913165266106 [2022-11-21 16:25:11,094 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2022-11-21 16:25:11,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2022-11-21 16:25:11,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:25:11,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2022-11-21 16:25:11,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:11,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:11,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:11,096 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 231 flow. Second operand 3 states and 260 transitions. [2022-11-21 16:25:11,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 75 transitions, 264 flow [2022-11-21 16:25:11,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 75 transitions, 256 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-21 16:25:11,100 INFO L231 Difference]: Finished difference. Result has 78 places, 72 transitions, 221 flow [2022-11-21 16:25:11,100 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2022-11-21 16:25:11,101 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, -12 predicate places. [2022-11-21 16:25:11,101 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 221 flow [2022-11-21 16:25:11,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:11,101 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:11,101 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:11,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:25:11,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-21 16:25:11,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:11,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1201091516, now seen corresponding path program 1 times [2022-11-21 16:25:11,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:11,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937665772] [2022-11-21 16:25:11,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:11,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:25:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:11,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:25:11,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937665772] [2022-11-21 16:25:11,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937665772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:25:11,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:25:11,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:25:11,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532901494] [2022-11-21 16:25:11,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:25:11,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:25:11,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:25:11,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:25:11,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:25:11,237 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 119 [2022-11-21 16:25:11,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 221 flow. Second operand has 6 states, 6 states have (on average 62.166666666666664) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:11,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:25:11,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 119 [2022-11-21 16:25:11,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:25:11,533 INFO L130 PetriNetUnfolder]: 316/963 cut-off events. [2022-11-21 16:25:11,533 INFO L131 PetriNetUnfolder]: For 667/667 co-relation queries the response was YES. [2022-11-21 16:25:11,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2792 conditions, 963 events. 316/963 cut-off events. For 667/667 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7296 event pairs, 20 based on Foata normal form. 6/950 useless extension candidates. Maximal degree in co-relation 2753. Up to 497 conditions per place. [2022-11-21 16:25:11,541 INFO L137 encePairwiseOnDemand]: 107/119 looper letters, 61 selfloop transitions, 17 changer transitions 0/114 dead transitions. [2022-11-21 16:25:11,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 553 flow [2022-11-21 16:25:11,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:25:11,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:25:11,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 491 transitions. [2022-11-21 16:25:11,544 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5894357743097239 [2022-11-21 16:25:11,544 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 491 transitions. [2022-11-21 16:25:11,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 491 transitions. [2022-11-21 16:25:11,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:25:11,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 491 transitions. [2022-11-21 16:25:11,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.14285714285714) internal successors, (491), 7 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:11,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:11,549 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:11,549 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 221 flow. Second operand 7 states and 491 transitions. [2022-11-21 16:25:11,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 553 flow [2022-11-21 16:25:11,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 114 transitions, 532 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:25:11,556 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 336 flow [2022-11-21 16:25:11,557 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=336, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2022-11-21 16:25:11,558 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, -4 predicate places. [2022-11-21 16:25:11,558 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 336 flow [2022-11-21 16:25:11,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.166666666666664) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:11,558 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:11,559 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:11,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:25:11,559 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-21 16:25:11,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:11,560 INFO L85 PathProgramCache]: Analyzing trace with hash -298955266, now seen corresponding path program 2 times [2022-11-21 16:25:11,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:11,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214113292] [2022-11-21 16:25:11,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:11,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:25:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:11,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:25:11,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214113292] [2022-11-21 16:25:11,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214113292] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:25:11,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837469403] [2022-11-21 16:25:11,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:25:11,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:25:11,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:25:11,794 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:25:11,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:25:11,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:25:11,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:25:11,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 16:25:11,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:25:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:12,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:25:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:12,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837469403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:25:12,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:25:12,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-11-21 16:25:12,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455530249] [2022-11-21 16:25:12,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:25:12,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-21 16:25:12,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:25:12,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-21 16:25:12,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:25:12,457 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 119 [2022-11-21 16:25:12,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 336 flow. Second operand has 23 states, 23 states have (on average 61.608695652173914) internal successors, (1417), 23 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:12,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:25:12,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 119 [2022-11-21 16:25:12,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:25:13,639 INFO L130 PetriNetUnfolder]: 647/1843 cut-off events. [2022-11-21 16:25:13,639 INFO L131 PetriNetUnfolder]: For 1701/1701 co-relation queries the response was YES. [2022-11-21 16:25:13,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5668 conditions, 1843 events. 647/1843 cut-off events. For 1701/1701 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15442 event pairs, 14 based on Foata normal form. 10/1840 useless extension candidates. Maximal degree in co-relation 5622. Up to 505 conditions per place. [2022-11-21 16:25:13,658 INFO L137 encePairwiseOnDemand]: 103/119 looper letters, 100 selfloop transitions, 42 changer transitions 0/177 dead transitions. [2022-11-21 16:25:13,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 177 transitions, 1045 flow [2022-11-21 16:25:13,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:25:13,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-21 16:25:13,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 894 transitions. [2022-11-21 16:25:13,666 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5778926955397543 [2022-11-21 16:25:13,666 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 894 transitions. [2022-11-21 16:25:13,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 894 transitions. [2022-11-21 16:25:13,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:25:13,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 894 transitions. [2022-11-21 16:25:13,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 68.76923076923077) internal successors, (894), 13 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:13,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 119.0) internal successors, (1666), 14 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:13,678 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 119.0) internal successors, (1666), 14 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:13,678 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 336 flow. Second operand 13 states and 894 transitions. [2022-11-21 16:25:13,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 177 transitions, 1045 flow [2022-11-21 16:25:13,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 177 transitions, 1032 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 16:25:13,687 INFO L231 Difference]: Finished difference. Result has 100 places, 108 transitions, 599 flow [2022-11-21 16:25:13,688 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=599, PETRI_PLACES=100, PETRI_TRANSITIONS=108} [2022-11-21 16:25:13,690 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, 10 predicate places. [2022-11-21 16:25:13,690 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 599 flow [2022-11-21 16:25:13,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 61.608695652173914) internal successors, (1417), 23 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:13,692 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:13,692 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:13,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:25:13,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:25:13,901 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-21 16:25:13,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:13,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1247337996, now seen corresponding path program 1 times [2022-11-21 16:25:13,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:13,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420937844] [2022-11-21 16:25:13,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:13,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:25:13,924 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:25:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:25:13,960 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:25:13,961 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:25:13,961 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-21 16:25:13,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-21 16:25:13,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-11-21 16:25:13,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-21 16:25:13,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-21 16:25:13,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-21 16:25:13,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 16:25:13,964 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-11-21 16:25:13,965 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 16:25:13,965 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-21 16:25:14,007 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 16:25:14,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 146 transitions, 356 flow [2022-11-21 16:25:14,030 INFO L130 PetriNetUnfolder]: 16/153 cut-off events. [2022-11-21 16:25:14,030 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-21 16:25:14,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 153 events. 16/153 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 288 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 173. Up to 10 conditions per place. [2022-11-21 16:25:14,032 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 146 transitions, 356 flow [2022-11-21 16:25:14,039 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 103 transitions, 241 flow [2022-11-21 16:25:14,041 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:25:14,041 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;@73a39d90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:25:14,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-21 16:25:14,045 INFO L130 PetriNetUnfolder]: 3/39 cut-off events. [2022-11-21 16:25:14,045 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:25:14,045 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:14,046 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:14,046 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:25:14,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:14,046 INFO L85 PathProgramCache]: Analyzing trace with hash -610787504, now seen corresponding path program 1 times [2022-11-21 16:25:14,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:14,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855365353] [2022-11-21 16:25:14,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:14,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:25:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:14,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:25:14,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855365353] [2022-11-21 16:25:14,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855365353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:25:14,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:25:14,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:25:14,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666544462] [2022-11-21 16:25:14,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:25:14,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:25:14,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:25:14,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:25:14,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:25:14,100 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 146 [2022-11-21 16:25:14,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 103 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:14,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:25:14,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 146 [2022-11-21 16:25:14,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:25:21,753 INFO L130 PetriNetUnfolder]: 50080/69789 cut-off events. [2022-11-21 16:25:21,754 INFO L131 PetriNetUnfolder]: For 20816/20816 co-relation queries the response was YES. [2022-11-21 16:25:21,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143487 conditions, 69789 events. 50080/69789 cut-off events. For 20816/20816 co-relation queries the response was YES. Maximal size of possible extension queue 2579. Compared 487579 event pairs, 15030 based on Foata normal form. 34578/102288 useless extension candidates. Maximal degree in co-relation 143453. Up to 42229 conditions per place. [2022-11-21 16:25:22,375 INFO L137 encePairwiseOnDemand]: 121/146 looper letters, 60 selfloop transitions, 15 changer transitions 0/118 dead transitions. [2022-11-21 16:25:22,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 118 transitions, 463 flow [2022-11-21 16:25:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:25:22,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:25:22,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 484 transitions. [2022-11-21 16:25:22,379 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.663013698630137 [2022-11-21 16:25:22,379 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 484 transitions. [2022-11-21 16:25:22,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 484 transitions. [2022-11-21 16:25:22,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:25:22,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 484 transitions. [2022-11-21 16:25:22,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.8) internal successors, (484), 5 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:22,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:22,383 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:22,383 INFO L175 Difference]: Start difference. First operand has 103 places, 103 transitions, 241 flow. Second operand 5 states and 484 transitions. [2022-11-21 16:25:22,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 118 transitions, 463 flow [2022-11-21 16:25:22,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 118 transitions, 438 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-11-21 16:25:22,393 INFO L231 Difference]: Finished difference. Result has 87 places, 87 transitions, 276 flow [2022-11-21 16:25:22,394 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=87, PETRI_TRANSITIONS=87} [2022-11-21 16:25:22,395 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -16 predicate places. [2022-11-21 16:25:22,395 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 87 transitions, 276 flow [2022-11-21 16:25:22,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:22,396 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:22,396 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:22,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 16:25:22,396 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:25:22,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:22,397 INFO L85 PathProgramCache]: Analyzing trace with hash 497899920, now seen corresponding path program 1 times [2022-11-21 16:25:22,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:22,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111473430] [2022-11-21 16:25:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:22,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:25:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:22,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:25:22,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111473430] [2022-11-21 16:25:22,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111473430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:25:22,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:25:22,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:25:22,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943736615] [2022-11-21 16:25:22,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:25:22,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:25:22,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:25:22,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:25:22,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:25:22,457 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 146 [2022-11-21 16:25:22,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 87 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:22,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:25:22,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 146 [2022-11-21 16:25:22,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:25:22,663 INFO L130 PetriNetUnfolder]: 414/1413 cut-off events. [2022-11-21 16:25:22,663 INFO L131 PetriNetUnfolder]: For 504/504 co-relation queries the response was YES. [2022-11-21 16:25:22,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2913 conditions, 1413 events. 414/1413 cut-off events. For 504/504 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 10102 event pairs, 50 based on Foata normal form. 765/2169 useless extension candidates. Maximal degree in co-relation 2875. Up to 460 conditions per place. [2022-11-21 16:25:22,674 INFO L137 encePairwiseOnDemand]: 136/146 looper letters, 10 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2022-11-21 16:25:22,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 87 transitions, 318 flow [2022-11-21 16:25:22,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:25:22,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:25:22,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2022-11-21 16:25:22,676 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7077625570776256 [2022-11-21 16:25:22,677 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2022-11-21 16:25:22,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2022-11-21 16:25:22,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:25:22,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2022-11-21 16:25:22,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:22,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:22,680 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:22,680 INFO L175 Difference]: Start difference. First operand has 87 places, 87 transitions, 276 flow. Second operand 3 states and 310 transitions. [2022-11-21 16:25:22,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 87 transitions, 318 flow [2022-11-21 16:25:22,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 308 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-21 16:25:22,683 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 262 flow [2022-11-21 16:25:22,684 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2022-11-21 16:25:22,685 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -15 predicate places. [2022-11-21 16:25:22,685 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 262 flow [2022-11-21 16:25:22,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:22,686 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:22,686 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:22,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 16:25:22,686 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:25:22,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:22,687 INFO L85 PathProgramCache]: Analyzing trace with hash -2145552573, now seen corresponding path program 1 times [2022-11-21 16:25:22,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:22,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184043999] [2022-11-21 16:25:22,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:22,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:25:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:22,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:25:22,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184043999] [2022-11-21 16:25:22,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184043999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:25:22,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:25:22,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:25:22,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203323225] [2022-11-21 16:25:22,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:25:22,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:25:22,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:25:22,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:25:22,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:25:22,907 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 146 [2022-11-21 16:25:22,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:22,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:25:22,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 146 [2022-11-21 16:25:22,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:25:23,390 INFO L130 PetriNetUnfolder]: 851/2282 cut-off events. [2022-11-21 16:25:23,390 INFO L131 PetriNetUnfolder]: For 1721/1721 co-relation queries the response was YES. [2022-11-21 16:25:23,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6882 conditions, 2282 events. 851/2282 cut-off events. For 1721/1721 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 19682 event pairs, 37 based on Foata normal form. 10/2254 useless extension candidates. Maximal degree in co-relation 6842. Up to 1407 conditions per place. [2022-11-21 16:25:23,414 INFO L137 encePairwiseOnDemand]: 131/146 looper letters, 78 selfloop transitions, 22 changer transitions 0/138 dead transitions. [2022-11-21 16:25:23,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 138 transitions, 696 flow [2022-11-21 16:25:23,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:25:23,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:25:23,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 574 transitions. [2022-11-21 16:25:23,416 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5616438356164384 [2022-11-21 16:25:23,417 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 574 transitions. [2022-11-21 16:25:23,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 574 transitions. [2022-11-21 16:25:23,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:25:23,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 574 transitions. [2022-11-21 16:25:23,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:23,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:23,422 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:23,422 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 262 flow. Second operand 7 states and 574 transitions. [2022-11-21 16:25:23,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 138 transitions, 696 flow [2022-11-21 16:25:23,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 138 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:25:23,428 INFO L231 Difference]: Finished difference. Result has 96 places, 99 transitions, 414 flow [2022-11-21 16:25:23,428 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=414, PETRI_PLACES=96, PETRI_TRANSITIONS=99} [2022-11-21 16:25:23,429 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -7 predicate places. [2022-11-21 16:25:23,429 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 99 transitions, 414 flow [2022-11-21 16:25:23,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:23,430 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:23,430 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:23,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 16:25:23,430 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:25:23,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:23,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1408106927, now seen corresponding path program 2 times [2022-11-21 16:25:23,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:23,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616710458] [2022-11-21 16:25:23,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:23,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:25:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:23,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:25:23,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616710458] [2022-11-21 16:25:23,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616710458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:25:23,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228299588] [2022-11-21 16:25:23,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:25:23,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:25:23,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:25:23,650 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:25:23,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:25:23,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:25:23,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:25:23,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 16:25:23,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:25:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:24,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:25:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:24,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228299588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:25:24,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:25:24,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-11-21 16:25:24,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666059731] [2022-11-21 16:25:24,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:25:24,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-21 16:25:24,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:25:24,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-21 16:25:24,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:25:24,221 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 146 [2022-11-21 16:25:24,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 99 transitions, 414 flow. Second operand has 23 states, 23 states have (on average 70.6086956521739) internal successors, (1624), 23 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:24,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:25:24,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 146 [2022-11-21 16:25:24,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:25:25,876 INFO L130 PetriNetUnfolder]: 1825/4623 cut-off events. [2022-11-21 16:25:25,876 INFO L131 PetriNetUnfolder]: For 4546/4546 co-relation queries the response was YES. [2022-11-21 16:25:25,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14609 conditions, 4623 events. 1825/4623 cut-off events. For 4546/4546 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 45884 event pairs, 23 based on Foata normal form. 20/4620 useless extension candidates. Maximal degree in co-relation 14562. Up to 1463 conditions per place. [2022-11-21 16:25:25,924 INFO L137 encePairwiseOnDemand]: 126/146 looper letters, 129 selfloop transitions, 55 changer transitions 0/221 dead transitions. [2022-11-21 16:25:25,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 221 transitions, 1350 flow [2022-11-21 16:25:25,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:25:25,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-21 16:25:25,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1049 transitions. [2022-11-21 16:25:25,929 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5526870389884089 [2022-11-21 16:25:25,929 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1049 transitions. [2022-11-21 16:25:25,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1049 transitions. [2022-11-21 16:25:25,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:25:25,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1049 transitions. [2022-11-21 16:25:25,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 80.6923076923077) internal successors, (1049), 13 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:25,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 146.0) internal successors, (2044), 14 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:25,938 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 146.0) internal successors, (2044), 14 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:25,938 INFO L175 Difference]: Start difference. First operand has 96 places, 99 transitions, 414 flow. Second operand 13 states and 1049 transitions. [2022-11-21 16:25:25,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 221 transitions, 1350 flow [2022-11-21 16:25:25,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 221 transitions, 1334 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 16:25:25,952 INFO L231 Difference]: Finished difference. Result has 110 places, 131 transitions, 763 flow [2022-11-21 16:25:25,952 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=763, PETRI_PLACES=110, PETRI_TRANSITIONS=131} [2022-11-21 16:25:25,953 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 7 predicate places. [2022-11-21 16:25:25,953 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 131 transitions, 763 flow [2022-11-21 16:25:25,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 70.6086956521739) internal successors, (1624), 23 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:25,954 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:25,954 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-21 16:25:25,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:25:26,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 16:25:26,167 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:25:26,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:26,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1530628823, now seen corresponding path program 3 times [2022-11-21 16:25:26,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:26,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149286996] [2022-11-21 16:25:26,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:26,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:25:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:26,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:25:26,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149286996] [2022-11-21 16:25:26,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149286996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:25:26,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110304609] [2022-11-21 16:25:26,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:25:26,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:25:26,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:25:26,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:25:26,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:25:26,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 16:25:26,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:25:26,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 16:25:26,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:25:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:26,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:25:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:27,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110304609] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:25:27,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:25:27,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 26 [2022-11-21 16:25:27,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131927271] [2022-11-21 16:25:27,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:25:27,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 16:25:27,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:25:27,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 16:25:27,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-11-21 16:25:27,145 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 146 [2022-11-21 16:25:27,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 131 transitions, 763 flow. Second operand has 26 states, 26 states have (on average 70.96153846153847) internal successors, (1845), 26 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:27,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:25:27,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 146 [2022-11-21 16:25:27,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:25:31,508 INFO L130 PetriNetUnfolder]: 4409/11192 cut-off events. [2022-11-21 16:25:31,508 INFO L131 PetriNetUnfolder]: For 16869/16869 co-relation queries the response was YES. [2022-11-21 16:25:31,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40342 conditions, 11192 events. 4409/11192 cut-off events. For 16869/16869 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 122602 event pairs, 23 based on Foata normal form. 180/11349 useless extension candidates. Maximal degree in co-relation 40289. Up to 2321 conditions per place. [2022-11-21 16:25:31,659 INFO L137 encePairwiseOnDemand]: 124/146 looper letters, 159 selfloop transitions, 202 changer transitions 0/398 dead transitions. [2022-11-21 16:25:31,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 398 transitions, 3162 flow [2022-11-21 16:25:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-21 16:25:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-21 16:25:31,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2445 transitions. [2022-11-21 16:25:31,677 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5233304794520548 [2022-11-21 16:25:31,677 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2445 transitions. [2022-11-21 16:25:31,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2445 transitions. [2022-11-21 16:25:31,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:25:31,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2445 transitions. [2022-11-21 16:25:31,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 76.40625) internal successors, (2445), 32 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:31,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 146.0) internal successors, (4818), 33 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:31,700 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 146.0) internal successors, (4818), 33 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:31,701 INFO L175 Difference]: Start difference. First operand has 110 places, 131 transitions, 763 flow. Second operand 32 states and 2445 transitions. [2022-11-21 16:25:31,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 398 transitions, 3162 flow [2022-11-21 16:25:31,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 398 transitions, 3031 flow, removed 48 selfloop flow, removed 5 redundant places. [2022-11-21 16:25:31,766 INFO L231 Difference]: Finished difference. Result has 137 places, 256 transitions, 1978 flow [2022-11-21 16:25:31,766 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1978, PETRI_PLACES=137, PETRI_TRANSITIONS=256} [2022-11-21 16:25:31,768 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 34 predicate places. [2022-11-21 16:25:31,768 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 256 transitions, 1978 flow [2022-11-21 16:25:31,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 70.96153846153847) internal successors, (1845), 26 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:31,769 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:31,769 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:31,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:25:31,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13e8e8a1-c7ea-4b32-b9ec-4759f2e1039d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 16:25:31,975 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:25:31,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:31,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1175858377, now seen corresponding path program 1 times [2022-11-21 16:25:31,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:31,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119985176] [2022-11-21 16:25:31,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:31,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:25:32,002 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:25:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:25:32,027 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:25:32,027 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:25:32,028 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-21 16:25:32,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-21 16:25:32,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2022-11-21 16:25:32,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-11-21 16:25:32,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-11-21 16:25:32,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-21 16:25:32,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-21 16:25:32,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-21 16:25:32,029 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2022-11-21 16:25:32,033 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 16:25:32,033 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-21 16:25:32,078 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 16:25:32,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 173 transitions, 436 flow [2022-11-21 16:25:32,104 INFO L130 PetriNetUnfolder]: 19/179 cut-off events. [2022-11-21 16:25:32,104 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-21 16:25:32,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 179 events. 19/179 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 345 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 206. Up to 12 conditions per place. [2022-11-21 16:25:32,106 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 173 transitions, 436 flow [2022-11-21 16:25:32,108 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 116 transitions, 280 flow [2022-11-21 16:25:32,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:25:32,110 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;@73a39d90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:25:32,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-21 16:25:32,113 INFO L130 PetriNetUnfolder]: 3/41 cut-off events. [2022-11-21 16:25:32,114 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:25:32,114 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:32,114 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:32,114 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-11-21 16:25:32,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:32,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1240615746, now seen corresponding path program 1 times [2022-11-21 16:25:32,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:32,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340881930] [2022-11-21 16:25:32,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:32,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:25:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:32,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:25:32,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340881930] [2022-11-21 16:25:32,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340881930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:25:32,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:25:32,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:25:32,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160749402] [2022-11-21 16:25:32,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:25:32,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:25:32,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:25:32,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:25:32,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:25:32,158 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 173 [2022-11-21 16:25:32,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 116 transitions, 280 flow. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:32,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:25:32,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 173 [2022-11-21 16:25:32,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand