./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 19:49:10,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:49:10,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:49:10,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:49:10,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:49:10,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:49:10,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:49:10,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:49:10,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:49:10,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:49:10,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:49:10,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:49:10,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:49:10,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:49:10,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:49:10,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:49:10,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:49:10,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:49:10,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:49:10,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:49:10,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:49:10,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:49:10,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:49:10,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:49:10,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:49:10,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:49:10,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:49:10,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:49:10,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:49:10,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:49:10,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:49:10,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:49:10,962 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:49:10,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:49:10,965 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:49:10,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:49:10,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:49:10,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:49:10,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:49:10,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:49:10,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:49:10,971 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:49:11,015 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:49:11,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:49:11,016 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:49:11,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:49:11,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:49:11,018 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:49:11,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:49:11,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:49:11,020 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:49:11,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:49:11,021 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:49:11,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:49:11,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:49:11,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:49:11,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:49:11,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:49:11,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:49:11,023 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:49:11,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:49:11,024 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:49:11,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:49:11,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:49:11,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:49:11,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:49:11,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:49:11,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:49:11,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:49:11,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:49:11,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:49:11,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:49:11,029 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:49:11,029 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:49:11,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:49:11,030 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_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 [2022-11-18 19:49:11,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:49:11,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:49:11,419 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:49:11,420 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:49:11,421 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:49:11,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i [2022-11-18 19:49:11,561 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/data/f2159c66d/c2a6e55057664f23954a898ed0a79f15/FLAGc44f841ce [2022-11-18 19:49:12,185 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:49:12,186 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i [2022-11-18 19:49:12,204 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/data/f2159c66d/c2a6e55057664f23954a898ed0a79f15/FLAGc44f841ce [2022-11-18 19:49:12,492 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/data/f2159c66d/c2a6e55057664f23954a898ed0a79f15 [2022-11-18 19:49:12,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:49:12,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:49:12,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:49:12,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:49:12,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:49:12,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:49:12" (1/1) ... [2022-11-18 19:49:12,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f9a0f65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:12, skipping insertion in model container [2022-11-18 19:49:12,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:49:12" (1/1) ... [2022-11-18 19:49:12,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:49:12,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:49:13,076 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i[30176,30189] [2022-11-18 19:49:13,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:49:13,139 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:49:13,209 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i[30176,30189] [2022-11-18 19:49:13,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:49:13,262 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:49:13,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:13 WrapperNode [2022-11-18 19:49:13,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:49:13,265 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:49:13,265 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:49:13,265 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:49:13,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:13" (1/1) ... [2022-11-18 19:49:13,303 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:13" (1/1) ... [2022-11-18 19:49:13,354 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2022-11-18 19:49:13,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:49:13,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:49:13,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:49:13,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:49:13,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:13" (1/1) ... [2022-11-18 19:49:13,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:13" (1/1) ... [2022-11-18 19:49:13,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:13" (1/1) ... [2022-11-18 19:49:13,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:13" (1/1) ... [2022-11-18 19:49:13,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:13" (1/1) ... [2022-11-18 19:49:13,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:13" (1/1) ... [2022-11-18 19:49:13,388 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:13" (1/1) ... [2022-11-18 19:49:13,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:13" (1/1) ... [2022-11-18 19:49:13,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:49:13,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:49:13,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:49:13,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:49:13,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:13" (1/1) ... [2022-11-18 19:49:13,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:49:13,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:49:13,451 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:49:13,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:49:13,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 19:49:13,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:49:13,501 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 19:49:13,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:49:13,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:49:13,501 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-18 19:49:13,501 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-18 19:49:13,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:49:13,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:49:13,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:49:13,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:49:13,504 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 19:49:13,676 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:49:13,678 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:49:14,016 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:49:14,027 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:49:14,028 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-18 19:49:14,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:49:14 BoogieIcfgContainer [2022-11-18 19:49:14,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:49:14,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:49:14,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:49:14,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:49:14,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:49:12" (1/3) ... [2022-11-18 19:49:14,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7619b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:49:14, skipping insertion in model container [2022-11-18 19:49:14,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:13" (2/3) ... [2022-11-18 19:49:14,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7619b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:49:14, skipping insertion in model container [2022-11-18 19:49:14,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:49:14" (3/3) ... [2022-11-18 19:49:14,051 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_24-sound_lock_racing.i [2022-11-18 19:49:14,064 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 19:49:14,078 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:49:14,079 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:49:14,079 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:49:14,168 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-18 19:49:14,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 119 transitions, 246 flow [2022-11-18 19:49:14,308 INFO L130 PetriNetUnfolder]: 18/155 cut-off events. [2022-11-18 19:49:14,308 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 19:49:14,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 155 events. 18/155 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 330 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2022-11-18 19:49:14,317 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 119 transitions, 246 flow [2022-11-18 19:49:14,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 114 transitions, 233 flow [2022-11-18 19:49:14,337 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:49:14,345 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;@7ce32e56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:49:14,346 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 19:49:14,384 INFO L130 PetriNetUnfolder]: 6/93 cut-off events. [2022-11-18 19:49:14,384 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 19:49:14,385 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:14,386 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:14,386 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:14,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:14,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1782355471, now seen corresponding path program 1 times [2022-11-18 19:49:14,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:14,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681576081] [2022-11-18 19:49:14,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:14,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:14,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:14,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681576081] [2022-11-18 19:49:14,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681576081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:14,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:14,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:49:14,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363669380] [2022-11-18 19:49:14,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:14,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:49:14,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:14,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:49:14,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:49:14,847 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 119 [2022-11-18 19:49:14,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 114 transitions, 233 flow. Second operand has 2 states, 2 states have (on average 105.5) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:14,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:14,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 119 [2022-11-18 19:49:14,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:14,912 INFO L130 PetriNetUnfolder]: 1/132 cut-off events. [2022-11-18 19:49:14,912 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 19:49:14,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 132 events. 1/132 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 197 event pairs, 0 based on Foata normal form. 16/141 useless extension candidates. Maximal degree in co-relation 73. Up to 2 conditions per place. [2022-11-18 19:49:14,914 INFO L137 encePairwiseOnDemand]: 108/119 looper letters, 1 selfloop transitions, 0 changer transitions 15/102 dead transitions. [2022-11-18 19:49:14,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 102 transitions, 211 flow [2022-11-18 19:49:14,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:49:14,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 19:49:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 222 transitions. [2022-11-18 19:49:14,932 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9327731092436975 [2022-11-18 19:49:14,933 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 222 transitions. [2022-11-18 19:49:14,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 222 transitions. [2022-11-18 19:49:14,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:14,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 222 transitions. [2022-11-18 19:49:14,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 111.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:14,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:14,949 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:14,952 INFO L175 Difference]: Start difference. First operand has 105 places, 114 transitions, 233 flow. Second operand 2 states and 222 transitions. [2022-11-18 19:49:14,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 102 transitions, 211 flow [2022-11-18 19:49:14,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 102 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:49:14,963 INFO L231 Difference]: Finished difference. Result has 105 places, 87 transitions, 179 flow [2022-11-18 19:49:14,969 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=179, PETRI_PLACES=105, PETRI_TRANSITIONS=87} [2022-11-18 19:49:14,976 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, 0 predicate places. [2022-11-18 19:49:14,977 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 87 transitions, 179 flow [2022-11-18 19:49:14,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 105.5) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:14,978 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:14,978 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:14,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:49:14,981 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:14,983 INFO L85 PathProgramCache]: Analyzing trace with hash 715660466, now seen corresponding path program 1 times [2022-11-18 19:49:14,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:14,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749005510] [2022-11-18 19:49:14,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:14,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:15,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:15,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749005510] [2022-11-18 19:49:15,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749005510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:15,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:15,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:49:15,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878845295] [2022-11-18 19:49:15,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:15,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:49:15,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:15,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:49:15,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:49:15,411 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 119 [2022-11-18 19:49:15,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 87 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:15,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:15,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 119 [2022-11-18 19:49:15,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:15,490 INFO L130 PetriNetUnfolder]: 1/91 cut-off events. [2022-11-18 19:49:15,491 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 19:49:15,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 91 events. 1/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 104. Up to 6 conditions per place. [2022-11-18 19:49:15,492 INFO L137 encePairwiseOnDemand]: 116/119 looper letters, 8 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2022-11-18 19:49:15,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 89 transitions, 203 flow [2022-11-18 19:49:15,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:49:15,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:49:15,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2022-11-18 19:49:15,496 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8543417366946778 [2022-11-18 19:49:15,496 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2022-11-18 19:49:15,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2022-11-18 19:49:15,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:15,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2022-11-18 19:49:15,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:15,502 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) [2022-11-18 19:49:15,502 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) [2022-11-18 19:49:15,503 INFO L175 Difference]: Start difference. First operand has 105 places, 87 transitions, 179 flow. Second operand 3 states and 305 transitions. [2022-11-18 19:49:15,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 89 transitions, 203 flow [2022-11-18 19:49:15,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 89 transitions, 203 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:49:15,507 INFO L231 Difference]: Finished difference. Result has 93 places, 87 transitions, 187 flow [2022-11-18 19:49:15,507 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=187, PETRI_PLACES=93, PETRI_TRANSITIONS=87} [2022-11-18 19:49:15,508 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -12 predicate places. [2022-11-18 19:49:15,508 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 87 transitions, 187 flow [2022-11-18 19:49:15,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:15,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:15,510 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:15,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:49:15,510 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:15,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:15,512 INFO L85 PathProgramCache]: Analyzing trace with hash -622781449, now seen corresponding path program 1 times [2022-11-18 19:49:15,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:15,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992074223] [2022-11-18 19:49:15,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:15,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:49:15,582 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 19:49:15,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:49:15,634 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 19:49:15,635 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 19:49:15,636 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 19:49:15,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 19:49:15,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 19:49:15,640 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-18 19:49:15,643 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 19:49:15,644 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-18 19:49:15,679 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 19:49:15,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 149 transitions, 316 flow [2022-11-18 19:49:15,773 INFO L130 PetriNetUnfolder]: 32/246 cut-off events. [2022-11-18 19:49:15,773 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-18 19:49:15,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 246 events. 32/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 681 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 157. Up to 8 conditions per place. [2022-11-18 19:49:15,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 149 transitions, 316 flow [2022-11-18 19:49:15,780 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 149 transitions, 316 flow [2022-11-18 19:49:15,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:49:15,784 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;@7ce32e56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:49:15,784 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 19:49:15,799 INFO L130 PetriNetUnfolder]: 6/93 cut-off events. [2022-11-18 19:49:15,800 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 19:49:15,800 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:15,800 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:15,801 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:15,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:15,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1610578383, now seen corresponding path program 1 times [2022-11-18 19:49:15,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:15,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159657355] [2022-11-18 19:49:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:15,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:15,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:15,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159657355] [2022-11-18 19:49:15,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159657355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:15,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:15,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:49:15,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634769208] [2022-11-18 19:49:15,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:15,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:49:15,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:15,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:49:15,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:49:15,904 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 149 [2022-11-18 19:49:15,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 149 transitions, 316 flow. Second operand has 2 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:15,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:15,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 149 [2022-11-18 19:49:15,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:15,986 INFO L130 PetriNetUnfolder]: 4/215 cut-off events. [2022-11-18 19:49:15,986 INFO L131 PetriNetUnfolder]: For 21/27 co-relation queries the response was YES. [2022-11-18 19:49:15,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 215 events. 4/215 cut-off events. For 21/27 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 516 event pairs, 0 based on Foata normal form. 42/246 useless extension candidates. Maximal degree in co-relation 141. Up to 7 conditions per place. [2022-11-18 19:49:15,993 INFO L137 encePairwiseOnDemand]: 132/149 looper letters, 2 selfloop transitions, 0 changer transitions 21/131 dead transitions. [2022-11-18 19:49:15,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 131 transitions, 288 flow [2022-11-18 19:49:15,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:49:15,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 19:49:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 275 transitions. [2022-11-18 19:49:16,002 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9228187919463087 [2022-11-18 19:49:16,003 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 275 transitions. [2022-11-18 19:49:16,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 275 transitions. [2022-11-18 19:49:16,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:16,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 275 transitions. [2022-11-18 19:49:16,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 137.5) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:16,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:16,008 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:16,008 INFO L175 Difference]: Start difference. First operand has 134 places, 149 transitions, 316 flow. Second operand 2 states and 275 transitions. [2022-11-18 19:49:16,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 131 transitions, 288 flow [2022-11-18 19:49:16,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 131 transitions, 288 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:49:16,012 INFO L231 Difference]: Finished difference. Result has 134 places, 110 transitions, 232 flow [2022-11-18 19:49:16,013 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=232, PETRI_PLACES=134, PETRI_TRANSITIONS=110} [2022-11-18 19:49:16,014 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 0 predicate places. [2022-11-18 19:49:16,014 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 110 transitions, 232 flow [2022-11-18 19:49:16,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:16,015 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:16,016 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:16,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 19:49:16,016 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:16,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:16,017 INFO L85 PathProgramCache]: Analyzing trace with hash 887437554, now seen corresponding path program 1 times [2022-11-18 19:49:16,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:16,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748937073] [2022-11-18 19:49:16,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:16,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:16,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:16,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748937073] [2022-11-18 19:49:16,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748937073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:16,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:16,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:49:16,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754197476] [2022-11-18 19:49:16,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:16,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:49:16,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:16,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:49:16,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:49:16,100 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 149 [2022-11-18 19:49:16,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 110 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:16,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:16,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 149 [2022-11-18 19:49:16,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:16,171 INFO L130 PetriNetUnfolder]: 1/134 cut-off events. [2022-11-18 19:49:16,172 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 19:49:16,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 134 events. 1/134 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 189 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 157. Up to 12 conditions per place. [2022-11-18 19:49:16,173 INFO L137 encePairwiseOnDemand]: 146/149 looper letters, 11 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2022-11-18 19:49:16,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 114 transitions, 266 flow [2022-11-18 19:49:16,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:49:16,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:49:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2022-11-18 19:49:16,176 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8366890380313199 [2022-11-18 19:49:16,177 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2022-11-18 19:49:16,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2022-11-18 19:49:16,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:16,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2022-11-18 19:49:16,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:16,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:16,184 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:16,184 INFO L175 Difference]: Start difference. First operand has 134 places, 110 transitions, 232 flow. Second operand 3 states and 374 transitions. [2022-11-18 19:49:16,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 114 transitions, 266 flow [2022-11-18 19:49:16,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 114 transitions, 264 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-18 19:49:16,191 INFO L231 Difference]: Finished difference. Result has 118 places, 111 transitions, 242 flow [2022-11-18 19:49:16,191 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=118, PETRI_TRANSITIONS=111} [2022-11-18 19:49:16,193 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, -16 predicate places. [2022-11-18 19:49:16,194 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 111 transitions, 242 flow [2022-11-18 19:49:16,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:16,194 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:16,195 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:16,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 19:49:16,196 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:16,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:16,197 INFO L85 PathProgramCache]: Analyzing trace with hash -639150252, now seen corresponding path program 1 times [2022-11-18 19:49:16,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:16,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291582478] [2022-11-18 19:49:16,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:16,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:16,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:16,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291582478] [2022-11-18 19:49:16,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291582478] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:49:16,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748109052] [2022-11-18 19:49:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:16,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:16,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:49:16,445 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:49:16,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:49:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:16,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:49:16,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:16,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:49:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:16,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748109052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:49:16,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:49:16,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 19:49:16,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725147332] [2022-11-18 19:49:16,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:49:16,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:49:16,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:16,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:49:16,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:49:16,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 149 [2022-11-18 19:49:16,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 111 transitions, 242 flow. Second operand has 10 states, 10 states have (on average 121.3) internal successors, (1213), 10 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:16,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:16,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 149 [2022-11-18 19:49:16,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:16,915 INFO L130 PetriNetUnfolder]: 1/112 cut-off events. [2022-11-18 19:49:16,916 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-18 19:49:16,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 112 events. 1/112 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 85 event pairs, 0 based on Foata normal form. 2/113 useless extension candidates. Maximal degree in co-relation 138. Up to 4 conditions per place. [2022-11-18 19:49:16,917 INFO L137 encePairwiseOnDemand]: 144/149 looper letters, 9 selfloop transitions, 7 changer transitions 0/106 dead transitions. [2022-11-18 19:49:16,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 106 transitions, 262 flow [2022-11-18 19:49:16,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:49:16,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 19:49:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1089 transitions. [2022-11-18 19:49:16,921 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8120805369127517 [2022-11-18 19:49:16,922 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1089 transitions. [2022-11-18 19:49:16,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1089 transitions. [2022-11-18 19:49:16,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:16,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1089 transitions. [2022-11-18 19:49:16,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 121.0) internal successors, (1089), 9 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:16,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 149.0) internal successors, (1490), 10 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:16,932 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 149.0) internal successors, (1490), 10 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:16,932 INFO L175 Difference]: Start difference. First operand has 118 places, 111 transitions, 242 flow. Second operand 9 states and 1089 transitions. [2022-11-18 19:49:16,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 106 transitions, 262 flow [2022-11-18 19:49:16,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 106 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:49:16,936 INFO L231 Difference]: Finished difference. Result has 114 places, 102 transitions, 234 flow [2022-11-18 19:49:16,937 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=234, PETRI_PLACES=114, PETRI_TRANSITIONS=102} [2022-11-18 19:49:16,938 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, -20 predicate places. [2022-11-18 19:49:16,938 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 102 transitions, 234 flow [2022-11-18 19:49:16,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 121.3) internal successors, (1213), 10 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:16,939 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:16,940 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:16,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:17,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:17,147 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:17,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:17,147 INFO L85 PathProgramCache]: Analyzing trace with hash -351505710, now seen corresponding path program 1 times [2022-11-18 19:49:17,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:17,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563810784] [2022-11-18 19:49:17,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:17,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:49:17,172 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 19:49:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:49:17,198 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 19:49:17,198 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 19:49:17,199 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 19:49:17,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 19:49:17,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 19:49:17,199 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-18 19:49:17,200 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 19:49:17,200 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-18 19:49:17,230 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 19:49:17,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 179 transitions, 388 flow [2022-11-18 19:49:17,326 INFO L130 PetriNetUnfolder]: 51/370 cut-off events. [2022-11-18 19:49:17,326 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-18 19:49:17,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 370 events. 51/370 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1167 event pairs, 1 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 254. Up to 16 conditions per place. [2022-11-18 19:49:17,330 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 179 transitions, 388 flow [2022-11-18 19:49:17,334 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 179 transitions, 388 flow [2022-11-18 19:49:17,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:49:17,337 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;@7ce32e56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:49:17,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 19:49:17,352 INFO L130 PetriNetUnfolder]: 6/93 cut-off events. [2022-11-18 19:49:17,353 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 19:49:17,353 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:17,353 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:17,354 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:17,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:17,354 INFO L85 PathProgramCache]: Analyzing trace with hash 930632689, now seen corresponding path program 1 times [2022-11-18 19:49:17,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:17,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670913250] [2022-11-18 19:49:17,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:17,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:17,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:17,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670913250] [2022-11-18 19:49:17,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670913250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:17,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:17,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:49:17,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433792383] [2022-11-18 19:49:17,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:17,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:49:17,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:17,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:49:17,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:49:17,421 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 179 [2022-11-18 19:49:17,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 179 transitions, 388 flow. Second operand has 2 states, 2 states have (on average 149.5) internal successors, (299), 2 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:17,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:17,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 179 [2022-11-18 19:49:17,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:17,529 INFO L130 PetriNetUnfolder]: 9/324 cut-off events. [2022-11-18 19:49:17,529 INFO L131 PetriNetUnfolder]: For 54/68 co-relation queries the response was YES. [2022-11-18 19:49:17,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 324 events. 9/324 cut-off events. For 54/68 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 979 event pairs, 1 based on Foata normal form. 106/413 useless extension candidates. Maximal degree in co-relation 229. Up to 16 conditions per place. [2022-11-18 19:49:17,532 INFO L137 encePairwiseOnDemand]: 156/179 looper letters, 3 selfloop transitions, 0 changer transitions 22/155 dead transitions. [2022-11-18 19:49:17,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 155 transitions, 352 flow [2022-11-18 19:49:17,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:49:17,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 19:49:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 327 transitions. [2022-11-18 19:49:17,535 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9134078212290503 [2022-11-18 19:49:17,535 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 327 transitions. [2022-11-18 19:49:17,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 327 transitions. [2022-11-18 19:49:17,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:17,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 327 transitions. [2022-11-18 19:49:17,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:17,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:17,541 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:17,541 INFO L175 Difference]: Start difference. First operand has 159 places, 179 transitions, 388 flow. Second operand 2 states and 327 transitions. [2022-11-18 19:49:17,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 155 transitions, 352 flow [2022-11-18 19:49:17,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 155 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:49:17,551 INFO L231 Difference]: Finished difference. Result has 159 places, 133 transitions, 287 flow [2022-11-18 19:49:17,552 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=287, PETRI_PLACES=159, PETRI_TRANSITIONS=133} [2022-11-18 19:49:17,555 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 0 predicate places. [2022-11-18 19:49:17,556 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 133 transitions, 287 flow [2022-11-18 19:49:17,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 149.5) internal successors, (299), 2 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:17,557 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:17,558 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:17,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 19:49:17,558 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:17,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:17,559 INFO L85 PathProgramCache]: Analyzing trace with hash -866318670, now seen corresponding path program 1 times [2022-11-18 19:49:17,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:17,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290120750] [2022-11-18 19:49:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:17,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:17,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:17,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290120750] [2022-11-18 19:49:17,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290120750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:17,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:17,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:49:17,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137994899] [2022-11-18 19:49:17,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:17,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:49:17,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:17,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:49:17,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:49:17,662 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 179 [2022-11-18 19:49:17,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 133 transitions, 287 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:17,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:17,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 179 [2022-11-18 19:49:17,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:17,737 INFO L130 PetriNetUnfolder]: 1/177 cut-off events. [2022-11-18 19:49:17,738 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-18 19:49:17,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 177 events. 1/177 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 332 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 211. Up to 18 conditions per place. [2022-11-18 19:49:17,739 INFO L137 encePairwiseOnDemand]: 176/179 looper letters, 12 selfloop transitions, 2 changer transitions 0/137 dead transitions. [2022-11-18 19:49:17,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 137 transitions, 323 flow [2022-11-18 19:49:17,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:49:17,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:49:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2022-11-18 19:49:17,742 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8212290502793296 [2022-11-18 19:49:17,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2022-11-18 19:49:17,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2022-11-18 19:49:17,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:17,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2022-11-18 19:49:17,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:17,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:17,749 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:17,749 INFO L175 Difference]: Start difference. First operand has 159 places, 133 transitions, 287 flow. Second operand 3 states and 441 transitions. [2022-11-18 19:49:17,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 137 transitions, 323 flow [2022-11-18 19:49:17,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 137 transitions, 317 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-18 19:49:17,754 INFO L231 Difference]: Finished difference. Result has 143 places, 134 transitions, 293 flow [2022-11-18 19:49:17,755 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=143, PETRI_TRANSITIONS=134} [2022-11-18 19:49:17,757 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, -16 predicate places. [2022-11-18 19:49:17,758 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 134 transitions, 293 flow [2022-11-18 19:49:17,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:17,759 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:17,760 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:17,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 19:49:17,760 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:17,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:17,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1071596272, now seen corresponding path program 1 times [2022-11-18 19:49:17,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:17,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891481453] [2022-11-18 19:49:17,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:17,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:17,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:17,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891481453] [2022-11-18 19:49:17,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891481453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:49:17,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903242692] [2022-11-18 19:49:17,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:17,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:17,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:49:17,887 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:49:17,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:49:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:18,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:49:18,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:18,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:49:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:18,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903242692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:49:18,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:49:18,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 19:49:18,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173829950] [2022-11-18 19:49:18,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:49:18,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:49:18,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:18,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:49:18,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:49:18,126 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 179 [2022-11-18 19:49:18,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 134 transitions, 293 flow. Second operand has 10 states, 10 states have (on average 143.3) internal successors, (1433), 10 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:18,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:18,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 179 [2022-11-18 19:49:18,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:18,263 INFO L130 PetriNetUnfolder]: 1/155 cut-off events. [2022-11-18 19:49:18,264 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-18 19:49:18,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 155 events. 1/155 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 205 event pairs, 0 based on Foata normal form. 2/156 useless extension candidates. Maximal degree in co-relation 193. Up to 7 conditions per place. [2022-11-18 19:49:18,265 INFO L137 encePairwiseOnDemand]: 173/179 looper letters, 13 selfloop transitions, 9 changer transitions 0/144 dead transitions. [2022-11-18 19:49:18,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 144 transitions, 359 flow [2022-11-18 19:49:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:49:18,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 19:49:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1293 transitions. [2022-11-18 19:49:18,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8026070763500931 [2022-11-18 19:49:18,270 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1293 transitions. [2022-11-18 19:49:18,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1293 transitions. [2022-11-18 19:49:18,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:18,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1293 transitions. [2022-11-18 19:49:18,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 143.66666666666666) internal successors, (1293), 9 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:18,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:18,281 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:18,281 INFO L175 Difference]: Start difference. First operand has 143 places, 134 transitions, 293 flow. Second operand 9 states and 1293 transitions. [2022-11-18 19:49:18,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 144 transitions, 359 flow [2022-11-18 19:49:18,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 144 transitions, 357 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:49:18,285 INFO L231 Difference]: Finished difference. Result has 153 places, 140 transitions, 341 flow [2022-11-18 19:49:18,286 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=341, PETRI_PLACES=153, PETRI_TRANSITIONS=140} [2022-11-18 19:49:18,286 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, -6 predicate places. [2022-11-18 19:49:18,287 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 140 transitions, 341 flow [2022-11-18 19:49:18,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 143.3) internal successors, (1433), 10 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:18,288 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:18,288 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:18,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:18,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 19:49:18,537 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:18,537 INFO L85 PathProgramCache]: Analyzing trace with hash 802692774, now seen corresponding path program 1 times [2022-11-18 19:49:18,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:18,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454519280] [2022-11-18 19:49:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:18,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:49:18,570 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 19:49:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:49:18,620 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 19:49:18,623 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 19:49:18,624 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 19:49:18,624 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 19:49:18,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 19:49:18,624 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-18 19:49:18,625 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 19:49:18,625 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-18 19:49:18,679 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-18 19:49:18,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 209 transitions, 462 flow [2022-11-18 19:49:18,809 INFO L130 PetriNetUnfolder]: 82/562 cut-off events. [2022-11-18 19:49:18,809 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-18 19:49:18,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 617 conditions, 562 events. 82/562 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2093 event pairs, 6 based on Foata normal form. 0/475 useless extension candidates. Maximal degree in co-relation 390. Up to 32 conditions per place. [2022-11-18 19:49:18,814 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 209 transitions, 462 flow [2022-11-18 19:49:18,823 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 209 transitions, 462 flow [2022-11-18 19:49:18,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:49:18,825 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;@7ce32e56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:49:18,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 19:49:18,836 INFO L130 PetriNetUnfolder]: 6/93 cut-off events. [2022-11-18 19:49:18,837 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 19:49:18,837 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:18,837 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:18,837 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:18,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1546310449, now seen corresponding path program 1 times [2022-11-18 19:49:18,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:18,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638517472] [2022-11-18 19:49:18,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:18,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:18,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:18,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638517472] [2022-11-18 19:49:18,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638517472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:18,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:18,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:49:18,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419804933] [2022-11-18 19:49:18,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:18,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:49:18,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:18,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:49:18,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:49:18,878 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 209 [2022-11-18 19:49:18,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 209 transitions, 462 flow. Second operand has 2 states, 2 states have (on average 171.5) internal successors, (343), 2 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:18,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:18,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 209 [2022-11-18 19:49:18,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:19,031 INFO L130 PetriNetUnfolder]: 22/497 cut-off events. [2022-11-18 19:49:19,031 INFO L131 PetriNetUnfolder]: For 123/135 co-relation queries the response was YES. [2022-11-18 19:49:19,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 497 events. 22/497 cut-off events. For 123/135 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1895 event pairs, 6 based on Foata normal form. 252/722 useless extension candidates. Maximal degree in co-relation 359. Up to 37 conditions per place. [2022-11-18 19:49:19,035 INFO L137 encePairwiseOnDemand]: 180/209 looper letters, 4 selfloop transitions, 0 changer transitions 23/179 dead transitions. [2022-11-18 19:49:19,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 179 transitions, 418 flow [2022-11-18 19:49:19,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:49:19,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 19:49:19,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 379 transitions. [2022-11-18 19:49:19,039 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9066985645933014 [2022-11-18 19:49:19,039 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 379 transitions. [2022-11-18 19:49:19,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 379 transitions. [2022-11-18 19:49:19,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:19,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 379 transitions. [2022-11-18 19:49:19,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 189.5) internal successors, (379), 2 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:19,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:19,043 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:19,044 INFO L175 Difference]: Start difference. First operand has 184 places, 209 transitions, 462 flow. Second operand 2 states and 379 transitions. [2022-11-18 19:49:19,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 179 transitions, 418 flow [2022-11-18 19:49:19,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 179 transitions, 418 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:49:19,051 INFO L231 Difference]: Finished difference. Result has 184 places, 156 transitions, 344 flow [2022-11-18 19:49:19,051 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=344, PETRI_PLACES=184, PETRI_TRANSITIONS=156} [2022-11-18 19:49:19,053 INFO L288 CegarLoopForPetriNet]: 184 programPoint places, 0 predicate places. [2022-11-18 19:49:19,053 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 156 transitions, 344 flow [2022-11-18 19:49:19,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 171.5) internal successors, (343), 2 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:19,054 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:19,054 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:19,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 19:49:19,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:19,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:19,055 INFO L85 PathProgramCache]: Analyzing trace with hash -250640910, now seen corresponding path program 1 times [2022-11-18 19:49:19,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:19,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383192835] [2022-11-18 19:49:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:19,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:19,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:19,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:19,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383192835] [2022-11-18 19:49:19,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383192835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:19,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:19,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:49:19,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948967798] [2022-11-18 19:49:19,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:19,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:49:19,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:19,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:49:19,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:49:19,120 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 209 [2022-11-18 19:49:19,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 156 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:19,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:19,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 209 [2022-11-18 19:49:19,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:19,222 INFO L130 PetriNetUnfolder]: 1/220 cut-off events. [2022-11-18 19:49:19,222 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-18 19:49:19,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 220 events. 1/220 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 473 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 266. Up to 24 conditions per place. [2022-11-18 19:49:19,224 INFO L137 encePairwiseOnDemand]: 206/209 looper letters, 13 selfloop transitions, 2 changer transitions 0/160 dead transitions. [2022-11-18 19:49:19,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 160 transitions, 382 flow [2022-11-18 19:49:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:49:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:49:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2022-11-18 19:49:19,226 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.810207336523126 [2022-11-18 19:49:19,227 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2022-11-18 19:49:19,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2022-11-18 19:49:19,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:19,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2022-11-18 19:49:19,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:19,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:19,232 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:19,232 INFO L175 Difference]: Start difference. First operand has 184 places, 156 transitions, 344 flow. Second operand 3 states and 508 transitions. [2022-11-18 19:49:19,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 160 transitions, 382 flow [2022-11-18 19:49:19,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 160 transitions, 370 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-18 19:49:19,237 INFO L231 Difference]: Finished difference. Result has 168 places, 157 transitions, 344 flow [2022-11-18 19:49:19,237 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=344, PETRI_PLACES=168, PETRI_TRANSITIONS=157} [2022-11-18 19:49:19,238 INFO L288 CegarLoopForPetriNet]: 184 programPoint places, -16 predicate places. [2022-11-18 19:49:19,238 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 157 transitions, 344 flow [2022-11-18 19:49:19,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:19,239 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:19,239 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:19,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 19:49:19,240 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:19,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:19,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1712740596, now seen corresponding path program 1 times [2022-11-18 19:49:19,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:19,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576706695] [2022-11-18 19:49:19,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:19,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:19,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:19,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576706695] [2022-11-18 19:49:19,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576706695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:49:19,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829378582] [2022-11-18 19:49:19,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:19,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:19,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:49:19,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:49:19,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:49:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:19,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:49:19,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:19,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:49:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:19,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829378582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:49:19,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:49:19,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 19:49:19,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643696475] [2022-11-18 19:49:19,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:49:19,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:49:19,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:19,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:49:19,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:49:19,619 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 209 [2022-11-18 19:49:19,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 157 transitions, 344 flow. Second operand has 10 states, 10 states have (on average 165.3) internal successors, (1653), 10 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:19,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:19,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 209 [2022-11-18 19:49:19,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:19,780 INFO L130 PetriNetUnfolder]: 1/198 cut-off events. [2022-11-18 19:49:19,781 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-18 19:49:19,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 198 events. 1/198 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 348 event pairs, 0 based on Foata normal form. 2/199 useless extension candidates. Maximal degree in co-relation 248. Up to 11 conditions per place. [2022-11-18 19:49:19,782 INFO L137 encePairwiseOnDemand]: 203/209 looper letters, 14 selfloop transitions, 9 changer transitions 0/167 dead transitions. [2022-11-18 19:49:19,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 167 transitions, 412 flow [2022-11-18 19:49:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:49:19,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 19:49:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1492 transitions. [2022-11-18 19:49:19,788 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7931951089845827 [2022-11-18 19:49:19,788 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1492 transitions. [2022-11-18 19:49:19,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1492 transitions. [2022-11-18 19:49:19,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:19,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1492 transitions. [2022-11-18 19:49:19,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 165.77777777777777) internal successors, (1492), 9 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:19,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 209.0) internal successors, (2090), 10 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:19,803 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 209.0) internal successors, (2090), 10 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:19,803 INFO L175 Difference]: Start difference. First operand has 168 places, 157 transitions, 344 flow. Second operand 9 states and 1492 transitions. [2022-11-18 19:49:19,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 167 transitions, 412 flow [2022-11-18 19:49:19,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 167 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:49:19,809 INFO L231 Difference]: Finished difference. Result has 178 places, 163 transitions, 392 flow [2022-11-18 19:49:19,810 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=392, PETRI_PLACES=178, PETRI_TRANSITIONS=163} [2022-11-18 19:49:19,811 INFO L288 CegarLoopForPetriNet]: 184 programPoint places, -6 predicate places. [2022-11-18 19:49:19,812 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 163 transitions, 392 flow [2022-11-18 19:49:19,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 165.3) internal successors, (1653), 10 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:19,814 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:19,814 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:19,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 19:49:20,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 19:49:20,021 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:20,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:20,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1506407293, now seen corresponding path program 1 times [2022-11-18 19:49:20,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:20,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624041043] [2022-11-18 19:49:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:20,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 19:49:20,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:20,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624041043] [2022-11-18 19:49:20,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624041043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:20,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:20,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:49:20,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140853976] [2022-11-18 19:49:20,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:20,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:49:20,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:20,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:49:20,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:49:20,203 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 209 [2022-11-18 19:49:20,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 163 transitions, 392 flow. Second operand has 5 states, 5 states have (on average 150.6) internal successors, (753), 5 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:20,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:20,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 209 [2022-11-18 19:49:20,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:30,684 INFO L130 PetriNetUnfolder]: 16743/41410 cut-off events. [2022-11-18 19:49:30,684 INFO L131 PetriNetUnfolder]: For 555/555 co-relation queries the response was YES. [2022-11-18 19:49:30,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64827 conditions, 41410 events. 16743/41410 cut-off events. For 555/555 co-relation queries the response was YES. Maximal size of possible extension queue 1767. Compared 494001 event pairs, 10951 based on Foata normal form. 750/41598 useless extension candidates. Maximal degree in co-relation 64816. Up to 14189 conditions per place. [2022-11-18 19:49:31,045 INFO L137 encePairwiseOnDemand]: 201/209 looper letters, 31 selfloop transitions, 5 changer transitions 53/227 dead transitions. [2022-11-18 19:49:31,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 227 transitions, 713 flow [2022-11-18 19:49:31,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:49:31,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 19:49:31,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1134 transitions. [2022-11-18 19:49:31,050 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7751196172248804 [2022-11-18 19:49:31,051 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1134 transitions. [2022-11-18 19:49:31,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1134 transitions. [2022-11-18 19:49:31,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:31,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1134 transitions. [2022-11-18 19:49:31,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:31,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 209.0) internal successors, (1672), 8 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:31,061 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 209.0) internal successors, (1672), 8 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:31,061 INFO L175 Difference]: Start difference. First operand has 178 places, 163 transitions, 392 flow. Second operand 7 states and 1134 transitions. [2022-11-18 19:49:31,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 227 transitions, 713 flow [2022-11-18 19:49:31,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 227 transitions, 707 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-18 19:49:31,075 INFO L231 Difference]: Finished difference. Result has 188 places, 167 transitions, 443 flow [2022-11-18 19:49:31,076 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=443, PETRI_PLACES=188, PETRI_TRANSITIONS=167} [2022-11-18 19:49:31,078 INFO L288 CegarLoopForPetriNet]: 184 programPoint places, 4 predicate places. [2022-11-18 19:49:31,078 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 167 transitions, 443 flow [2022-11-18 19:49:31,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 150.6) internal successors, (753), 5 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:31,079 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:31,080 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:31,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 19:49:31,080 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:31,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:31,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1776961165, now seen corresponding path program 1 times [2022-11-18 19:49:31,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:31,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199365676] [2022-11-18 19:49:31,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:31,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:49:31,113 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 19:49:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:49:31,162 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 19:49:31,163 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 19:49:31,163 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 19:49:31,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 19:49:31,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 19:49:31,164 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-18 19:49:31,165 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 19:49:31,166 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-18 19:49:31,222 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-18 19:49:31,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 239 transitions, 538 flow [2022-11-18 19:49:31,526 INFO L130 PetriNetUnfolder]: 141/894 cut-off events. [2022-11-18 19:49:31,526 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-18 19:49:31,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1005 conditions, 894 events. 141/894 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3979 event pairs, 23 based on Foata normal form. 0/763 useless extension candidates. Maximal degree in co-relation 607. Up to 80 conditions per place. [2022-11-18 19:49:31,535 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 239 transitions, 538 flow [2022-11-18 19:49:31,545 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 239 transitions, 538 flow [2022-11-18 19:49:31,546 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:49:31,546 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;@7ce32e56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:49:31,547 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 19:49:31,555 INFO L130 PetriNetUnfolder]: 6/93 cut-off events. [2022-11-18 19:49:31,555 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 19:49:31,555 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:31,555 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:31,556 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:31,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:31,556 INFO L85 PathProgramCache]: Analyzing trace with hash 236454897, now seen corresponding path program 1 times [2022-11-18 19:49:31,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:31,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126192010] [2022-11-18 19:49:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:31,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:31,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:31,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126192010] [2022-11-18 19:49:31,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126192010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:31,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:31,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:49:31,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439687880] [2022-11-18 19:49:31,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:31,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:49:31,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:31,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:49:31,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:49:31,597 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 239 [2022-11-18 19:49:31,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 239 transitions, 538 flow. Second operand has 2 states, 2 states have (on average 193.5) internal successors, (387), 2 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:31,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:31,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 239 [2022-11-18 19:49:31,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:31,811 INFO L130 PetriNetUnfolder]: 55/802 cut-off events. [2022-11-18 19:49:31,812 INFO L131 PetriNetUnfolder]: For 292/320 co-relation queries the response was YES. [2022-11-18 19:49:31,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 999 conditions, 802 events. 55/802 cut-off events. For 292/320 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3696 event pairs, 23 based on Foata normal form. 580/1337 useless extension candidates. Maximal degree in co-relation 578. Up to 86 conditions per place. [2022-11-18 19:49:31,819 INFO L137 encePairwiseOnDemand]: 204/239 looper letters, 5 selfloop transitions, 0 changer transitions 24/203 dead transitions. [2022-11-18 19:49:31,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 203 transitions, 486 flow [2022-11-18 19:49:31,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:49:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 19:49:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 431 transitions. [2022-11-18 19:49:31,822 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9016736401673641 [2022-11-18 19:49:31,822 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 431 transitions. [2022-11-18 19:49:31,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 431 transitions. [2022-11-18 19:49:31,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:31,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 431 transitions. [2022-11-18 19:49:31,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 215.5) internal successors, (431), 2 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:31,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:31,826 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:31,827 INFO L175 Difference]: Start difference. First operand has 209 places, 239 transitions, 538 flow. Second operand 2 states and 431 transitions. [2022-11-18 19:49:31,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 203 transitions, 486 flow [2022-11-18 19:49:31,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 203 transitions, 486 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:49:31,833 INFO L231 Difference]: Finished difference. Result has 209 places, 179 transitions, 403 flow [2022-11-18 19:49:31,833 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=403, PETRI_PLACES=209, PETRI_TRANSITIONS=179} [2022-11-18 19:49:31,834 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 0 predicate places. [2022-11-18 19:49:31,835 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 179 transitions, 403 flow [2022-11-18 19:49:31,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 193.5) internal successors, (387), 2 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:31,835 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:31,836 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:31,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 19:49:31,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:31,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:31,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1560496462, now seen corresponding path program 1 times [2022-11-18 19:49:31,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:31,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211687113] [2022-11-18 19:49:31,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:31,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:31,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:31,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211687113] [2022-11-18 19:49:31,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211687113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:31,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:31,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:49:31,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506438680] [2022-11-18 19:49:31,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:31,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:49:31,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:31,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:49:31,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:49:31,895 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 239 [2022-11-18 19:49:31,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 179 transitions, 403 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:31,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:31,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 239 [2022-11-18 19:49:31,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:31,987 INFO L130 PetriNetUnfolder]: 1/263 cut-off events. [2022-11-18 19:49:31,988 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-18 19:49:31,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 263 events. 1/263 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 618 event pairs, 0 based on Foata normal form. 0/257 useless extension candidates. Maximal degree in co-relation 322. Up to 30 conditions per place. [2022-11-18 19:49:31,989 INFO L137 encePairwiseOnDemand]: 236/239 looper letters, 14 selfloop transitions, 2 changer transitions 0/183 dead transitions. [2022-11-18 19:49:31,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 183 transitions, 443 flow [2022-11-18 19:49:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:49:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:49:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2022-11-18 19:49:31,992 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8019525801952581 [2022-11-18 19:49:31,992 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2022-11-18 19:49:31,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2022-11-18 19:49:31,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:31,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2022-11-18 19:49:31,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:31,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:31,998 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:31,998 INFO L175 Difference]: Start difference. First operand has 209 places, 179 transitions, 403 flow. Second operand 3 states and 575 transitions. [2022-11-18 19:49:31,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 183 transitions, 443 flow [2022-11-18 19:49:32,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 183 transitions, 423 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-18 19:49:32,006 INFO L231 Difference]: Finished difference. Result has 193 places, 180 transitions, 395 flow [2022-11-18 19:49:32,007 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=395, PETRI_PLACES=193, PETRI_TRANSITIONS=180} [2022-11-18 19:49:32,007 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, -16 predicate places. [2022-11-18 19:49:32,008 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 180 transitions, 395 flow [2022-11-18 19:49:32,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:32,008 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:32,009 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:32,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 19:49:32,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:32,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:32,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1732384072, now seen corresponding path program 1 times [2022-11-18 19:49:32,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:32,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985644545] [2022-11-18 19:49:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:32,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:32,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:32,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985644545] [2022-11-18 19:49:32,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985644545] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:49:32,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748379215] [2022-11-18 19:49:32,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:32,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:32,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:49:32,119 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:49:32,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:49:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:32,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:49:32,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:32,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:32,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:49:32,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:49:32,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748379215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:49:32,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:49:32,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 19:49:32,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856269482] [2022-11-18 19:49:32,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:49:32,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:49:32,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:32,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:49:32,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:49:32,393 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 239 [2022-11-18 19:49:32,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 180 transitions, 395 flow. Second operand has 10 states, 10 states have (on average 187.3) internal successors, (1873), 10 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:32,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:32,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 239 [2022-11-18 19:49:32,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:32,546 INFO L130 PetriNetUnfolder]: 1/241 cut-off events. [2022-11-18 19:49:32,546 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-18 19:49:32,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 241 events. 1/241 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 488 event pairs, 0 based on Foata normal form. 2/242 useless extension candidates. Maximal degree in co-relation 303. Up to 15 conditions per place. [2022-11-18 19:49:32,548 INFO L137 encePairwiseOnDemand]: 233/239 looper letters, 15 selfloop transitions, 9 changer transitions 0/190 dead transitions. [2022-11-18 19:49:32,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 190 transitions, 465 flow [2022-11-18 19:49:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:49:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 19:49:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1691 transitions. [2022-11-18 19:49:32,554 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7861459786145979 [2022-11-18 19:49:32,555 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1691 transitions. [2022-11-18 19:49:32,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1691 transitions. [2022-11-18 19:49:32,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:32,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1691 transitions. [2022-11-18 19:49:32,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 187.88888888888889) internal successors, (1691), 9 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:32,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 239.0) internal successors, (2390), 10 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:32,569 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 239.0) internal successors, (2390), 10 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:32,569 INFO L175 Difference]: Start difference. First operand has 193 places, 180 transitions, 395 flow. Second operand 9 states and 1691 transitions. [2022-11-18 19:49:32,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 190 transitions, 465 flow [2022-11-18 19:49:32,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 190 transitions, 463 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:49:32,706 INFO L231 Difference]: Finished difference. Result has 203 places, 186 transitions, 443 flow [2022-11-18 19:49:32,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=443, PETRI_PLACES=203, PETRI_TRANSITIONS=186} [2022-11-18 19:49:32,708 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, -6 predicate places. [2022-11-18 19:49:32,709 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 186 transitions, 443 flow [2022-11-18 19:49:32,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 187.3) internal successors, (1873), 10 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:32,710 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:32,711 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:32,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:32,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b8b6cf1-b4f2-45b0-834a-4b325a0e6ff2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:49:32,918 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:49:32,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:32,919 INFO L85 PathProgramCache]: Analyzing trace with hash -417745737, now seen corresponding path program 1 times [2022-11-18 19:49:32,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:32,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920675428] [2022-11-18 19:49:32,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:32,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 19:49:33,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:33,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920675428] [2022-11-18 19:49:33,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920675428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:33,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:33,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:49:33,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150295978] [2022-11-18 19:49:33,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:33,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:49:33,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:33,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:49:33,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:49:33,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 239 [2022-11-18 19:49:33,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 186 transitions, 443 flow. Second operand has 5 states, 5 states have (on average 168.6) internal successors, (843), 5 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:49:33,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:33,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 239 [2022-11-18 19:49:33,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand