./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc --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 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df --- 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-5e519f3 [2022-11-02 20:58:03,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:58:03,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:58:03,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:58:03,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:58:03,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:58:03,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:58:03,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:58:03,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:58:03,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:58:03,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:58:03,254 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:58:03,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:58:03,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:58:03,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:58:03,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:58:03,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:58:03,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:58:03,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:58:03,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:58:03,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:58:03,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:58:03,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:58:03,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:58:03,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:58:03,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:58:03,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:58:03,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:58:03,291 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:58:03,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:58:03,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:58:03,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:58:03,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:58:03,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:58:03,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:58:03,300 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:58:03,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:58:03,301 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:58:03,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:58:03,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:58:03,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:58:03,304 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:58:03,342 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:58:03,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:58:03,343 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:58:03,343 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:58:03,344 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:58:03,344 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:58:03,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:58:03,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:58:03,345 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:58:03,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:58:03,347 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:58:03,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:58:03,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:58:03,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:58:03,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:58:03,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:58:03,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:58:03,348 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:58:03,348 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:58:03,349 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:58:03,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:58:03,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:58:03,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:58:03,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:58:03,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:58:03,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:58:03,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:58:03,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:58:03,351 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:58:03,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:58:03,352 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:58:03,353 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:58:03,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:58:03,353 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_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df [2022-11-02 20:58:03,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:58:03,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:58:03,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:58:03,725 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:58:03,726 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:58:03,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2022-11-02 20:58:03,815 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/data/503a123eb/1d7ac0aa466f4ac88d9f23dcf2221a49/FLAGc3c28acfe [2022-11-02 20:58:04,404 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:58:04,405 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2022-11-02 20:58:04,420 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/data/503a123eb/1d7ac0aa466f4ac88d9f23dcf2221a49/FLAGc3c28acfe [2022-11-02 20:58:04,646 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/data/503a123eb/1d7ac0aa466f4ac88d9f23dcf2221a49 [2022-11-02 20:58:04,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:58:04,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:58:04,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:58:04,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:58:04,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:58:04,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:58:04" (1/1) ... [2022-11-02 20:58:04,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@763c5cd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:58:04, skipping insertion in model container [2022-11-02 20:58:04,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:58:04" (1/1) ... [2022-11-02 20:58:04,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:58:04,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:58:05,301 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i[41323,41336] [2022-11-02 20:58:05,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:58:05,355 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:58:05,387 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i[41323,41336] [2022-11-02 20:58:05,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:58:05,458 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:58:05,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:58:05 WrapperNode [2022-11-02 20:58:05,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:58:05,459 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:58:05,460 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:58:05,460 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:58:05,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:58:05" (1/1) ... [2022-11-02 20:58:05,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:58:05" (1/1) ... [2022-11-02 20:58:05,515 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 186 [2022-11-02 20:58:05,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:58:05,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:58:05,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:58:05,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:58:05,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:58:05" (1/1) ... [2022-11-02 20:58:05,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:58:05" (1/1) ... [2022-11-02 20:58:05,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:58:05" (1/1) ... [2022-11-02 20:58:05,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:58:05" (1/1) ... [2022-11-02 20:58:05,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:58:05" (1/1) ... [2022-11-02 20:58:05,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:58:05" (1/1) ... [2022-11-02 20:58:05,561 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:58:05" (1/1) ... [2022-11-02 20:58:05,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:58:05" (1/1) ... [2022-11-02 20:58:05,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:58:05,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:58:05,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:58:05,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:58:05,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:58:05" (1/1) ... [2022-11-02 20:58:05,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:58:05,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:05,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:58:05,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:58:05,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:58:05,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:58:05,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:58:05,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:58:05,662 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-02 20:58:05,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:58:05,662 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-02 20:58:05,663 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-02 20:58:05,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:58:05,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:58:05,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:58:05,665 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:58:05,854 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:58:05,856 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:58:06,172 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:58:06,181 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:58:06,181 INFO L300 CfgBuilder]: Removed 23 assume(true) statements. [2022-11-02 20:58:06,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:58:06 BoogieIcfgContainer [2022-11-02 20:58:06,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:58:06,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:58:06,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:58:06,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:58:06,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:58:04" (1/3) ... [2022-11-02 20:58:06,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5572f2de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:58:06, skipping insertion in model container [2022-11-02 20:58:06,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:58:05" (2/3) ... [2022-11-02 20:58:06,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5572f2de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:58:06, skipping insertion in model container [2022-11-02 20:58:06,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:58:06" (3/3) ... [2022-11-02 20:58:06,201 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2022-11-02 20:58:06,210 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:58:06,220 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:58:06,221 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-02 20:58:06,221 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:58:06,317 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-02 20:58:06,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 197 transitions, 402 flow [2022-11-02 20:58:06,458 INFO L130 PetriNetUnfolder]: 45/269 cut-off events. [2022-11-02 20:58:06,458 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-11-02 20:58:06,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 269 events. 45/269 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 856 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2022-11-02 20:58:06,466 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 197 transitions, 402 flow [2022-11-02 20:58:06,473 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 192 transitions, 389 flow [2022-11-02 20:58:06,484 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:58:06,491 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;@5a84bd3d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:58:06,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-02 20:58:06,522 INFO L130 PetriNetUnfolder]: 12/130 cut-off events. [2022-11-02 20:58:06,522 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:58:06,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:06,523 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:06,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 20:58:06,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:06,529 INFO L85 PathProgramCache]: Analyzing trace with hash -932142378, now seen corresponding path program 1 times [2022-11-02 20:58:06,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:06,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530403849] [2022-11-02 20:58:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:06,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:58:06,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:06,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530403849] [2022-11-02 20:58:06,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530403849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:58:06,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:58:06,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:58:06,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110697123] [2022-11-02 20:58:06,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:58:06,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:58:06,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:07,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:58:07,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:58:07,030 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 197 [2022-11-02 20:58:07,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 192 transitions, 389 flow. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:07,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:07,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 197 [2022-11-02 20:58:07,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:07,186 INFO L130 PetriNetUnfolder]: 4/225 cut-off events. [2022-11-02 20:58:07,187 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:58:07,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 225 events. 4/225 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 634 event pairs, 0 based on Foata normal form. 39/251 useless extension candidates. Maximal degree in co-relation 122. Up to 9 conditions per place. [2022-11-02 20:58:07,191 INFO L137 encePairwiseOnDemand]: 167/197 looper letters, 10 selfloop transitions, 2 changer transitions 1/167 dead transitions. [2022-11-02 20:58:07,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 167 transitions, 363 flow [2022-11-02 20:58:07,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:58:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:58:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2022-11-02 20:58:07,206 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8764805414551607 [2022-11-02 20:58:07,207 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2022-11-02 20:58:07,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2022-11-02 20:58:07,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:07,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2022-11-02 20:58:07,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:07,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:07,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:07,231 INFO L175 Difference]: Start difference. First operand has 165 places, 192 transitions, 389 flow. Second operand 3 states and 518 transitions. [2022-11-02 20:58:07,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 167 transitions, 363 flow [2022-11-02 20:58:07,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 167 transitions, 363 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:58:07,241 INFO L231 Difference]: Finished difference. Result has 166 places, 163 transitions, 341 flow [2022-11-02 20:58:07,244 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=341, PETRI_PLACES=166, PETRI_TRANSITIONS=163} [2022-11-02 20:58:07,248 INFO L287 CegarLoopForPetriNet]: 165 programPoint places, 1 predicate places. [2022-11-02 20:58:07,248 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 163 transitions, 341 flow [2022-11-02 20:58:07,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:07,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:07,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:07,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:58:07,250 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 20:58:07,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:07,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2008438335, now seen corresponding path program 1 times [2022-11-02 20:58:07,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:07,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147329442] [2022-11-02 20:58:07,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:07,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:07,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:07,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147329442] [2022-11-02 20:58:07,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147329442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:07,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595169959] [2022-11-02 20:58:07,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:07,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:07,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:07,464 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:07,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:58:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:07,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:58:07,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:58:07,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:58:07,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595169959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:58:07,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:58:07,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-02 20:58:07,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806310281] [2022-11-02 20:58:07,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:58:07,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:58:07,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:07,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:58:07,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:58:07,668 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 197 [2022-11-02 20:58:07,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 163 transitions, 341 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:07,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:07,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 197 [2022-11-02 20:58:07,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:07,752 INFO L130 PetriNetUnfolder]: 3/170 cut-off events. [2022-11-02 20:58:07,752 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:58:07,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 170 events. 3/170 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 322 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 157. Up to 6 conditions per place. [2022-11-02 20:58:07,756 INFO L137 encePairwiseOnDemand]: 194/197 looper letters, 8 selfloop transitions, 2 changer transitions 0/165 dead transitions. [2022-11-02 20:58:07,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 165 transitions, 365 flow [2022-11-02 20:58:07,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:58:07,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:58:07,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2022-11-02 20:58:07,761 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8257191201353637 [2022-11-02 20:58:07,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2022-11-02 20:58:07,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2022-11-02 20:58:07,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:07,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2022-11-02 20:58:07,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:07,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:07,767 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:07,767 INFO L175 Difference]: Start difference. First operand has 166 places, 163 transitions, 341 flow. Second operand 3 states and 488 transitions. [2022-11-02 20:58:07,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 165 transitions, 365 flow [2022-11-02 20:58:07,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 165 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:58:07,777 INFO L231 Difference]: Finished difference. Result has 167 places, 163 transitions, 347 flow [2022-11-02 20:58:07,778 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=167, PETRI_TRANSITIONS=163} [2022-11-02 20:58:07,779 INFO L287 CegarLoopForPetriNet]: 165 programPoint places, 2 predicate places. [2022-11-02 20:58:07,780 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 163 transitions, 347 flow [2022-11-02 20:58:07,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:07,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:07,781 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:07,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:58:07,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:07,998 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 20:58:07,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:07,999 INFO L85 PathProgramCache]: Analyzing trace with hash -408777690, now seen corresponding path program 1 times [2022-11-02 20:58:07,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:07,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243001255] [2022-11-02 20:58:07,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:08,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:58:08,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:08,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243001255] [2022-11-02 20:58:08,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243001255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:08,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083689897] [2022-11-02 20:58:08,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:08,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:08,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:08,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:08,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:58:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:08,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:58:08,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:58:08,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:58:08,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083689897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:58:08,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:58:08,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:58:08,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751716924] [2022-11-02 20:58:08,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:08,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:58:08,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:08,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:58:08,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:58:08,353 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 197 [2022-11-02 20:58:08,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 163 transitions, 347 flow. Second operand has 10 states, 10 states have (on average 160.1) internal successors, (1601), 10 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:08,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:08,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 197 [2022-11-02 20:58:08,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:08,480 INFO L130 PetriNetUnfolder]: 3/177 cut-off events. [2022-11-02 20:58:08,481 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:58:08,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 177 events. 3/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 318 event pairs, 0 based on Foata normal form. 2/173 useless extension candidates. Maximal degree in co-relation 145. Up to 6 conditions per place. [2022-11-02 20:58:08,483 INFO L137 encePairwiseOnDemand]: 191/197 looper letters, 11 selfloop transitions, 9 changer transitions 0/173 dead transitions. [2022-11-02 20:58:08,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 173 transitions, 409 flow [2022-11-02 20:58:08,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:58:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:58:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1444 transitions. [2022-11-02 20:58:08,487 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.81443880428652 [2022-11-02 20:58:08,488 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1444 transitions. [2022-11-02 20:58:08,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1444 transitions. [2022-11-02 20:58:08,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:08,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1444 transitions. [2022-11-02 20:58:08,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.44444444444446) internal successors, (1444), 9 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:08,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 197.0) internal successors, (1970), 10 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:08,499 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 197.0) internal successors, (1970), 10 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:08,499 INFO L175 Difference]: Start difference. First operand has 167 places, 163 transitions, 347 flow. Second operand 9 states and 1444 transitions. [2022-11-02 20:58:08,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 173 transitions, 409 flow [2022-11-02 20:58:08,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 173 transitions, 405 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:58:08,504 INFO L231 Difference]: Finished difference. Result has 176 places, 169 transitions, 393 flow [2022-11-02 20:58:08,505 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=393, PETRI_PLACES=176, PETRI_TRANSITIONS=169} [2022-11-02 20:58:08,506 INFO L287 CegarLoopForPetriNet]: 165 programPoint places, 11 predicate places. [2022-11-02 20:58:08,506 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 169 transitions, 393 flow [2022-11-02 20:58:08,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 160.1) internal successors, (1601), 10 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:08,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:08,508 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:08,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:08,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:08,728 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 20:58:08,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:08,729 INFO L85 PathProgramCache]: Analyzing trace with hash 81295910, now seen corresponding path program 2 times [2022-11-02 20:58:08,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:08,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71071747] [2022-11-02 20:58:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:08,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:58:08,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:08,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71071747] [2022-11-02 20:58:08,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71071747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:08,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337075743] [2022-11-02 20:58:08,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:58:08,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:08,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:08,913 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:08,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:58:09,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:58:09,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:58:09,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:58:09,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:58:09,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:58:09,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337075743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:58:09,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:58:09,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:58:09,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675326220] [2022-11-02 20:58:09,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:09,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:58:09,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:09,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:58:09,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:58:09,207 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 197 [2022-11-02 20:58:09,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 169 transitions, 393 flow. Second operand has 18 states, 18 states have (on average 160.27777777777777) internal successors, (2885), 18 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:09,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:09,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 197 [2022-11-02 20:58:09,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:09,454 INFO L130 PetriNetUnfolder]: 3/197 cut-off events. [2022-11-02 20:58:09,454 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-02 20:58:09,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 197 events. 3/197 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 318 event pairs, 0 based on Foata normal form. 4/195 useless extension candidates. Maximal degree in co-relation 167. Up to 11 conditions per place. [2022-11-02 20:58:09,457 INFO L137 encePairwiseOnDemand]: 191/197 looper letters, 19 selfloop transitions, 21 changer transitions 0/193 dead transitions. [2022-11-02 20:58:09,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 193 transitions, 581 flow [2022-11-02 20:58:09,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:58:09,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:58:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3362 transitions. [2022-11-02 20:58:09,465 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8126661832245589 [2022-11-02 20:58:09,465 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3362 transitions. [2022-11-02 20:58:09,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3362 transitions. [2022-11-02 20:58:09,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:09,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3362 transitions. [2022-11-02 20:58:09,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 160.0952380952381) internal successors, (3362), 21 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:09,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 197.0) internal successors, (4334), 22 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:09,486 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 197.0) internal successors, (4334), 22 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:09,486 INFO L175 Difference]: Start difference. First operand has 176 places, 169 transitions, 393 flow. Second operand 21 states and 3362 transitions. [2022-11-02 20:58:09,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 193 transitions, 581 flow [2022-11-02 20:58:09,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 193 transitions, 567 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:58:09,492 INFO L231 Difference]: Finished difference. Result has 200 places, 182 transitions, 517 flow [2022-11-02 20:58:09,493 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=517, PETRI_PLACES=200, PETRI_TRANSITIONS=182} [2022-11-02 20:58:09,493 INFO L287 CegarLoopForPetriNet]: 165 programPoint places, 35 predicate places. [2022-11-02 20:58:09,494 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 182 transitions, 517 flow [2022-11-02 20:58:09,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 160.27777777777777) internal successors, (2885), 18 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:09,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:09,496 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:09,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:09,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:09,710 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 20:58:09,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:09,710 INFO L85 PathProgramCache]: Analyzing trace with hash 653252134, now seen corresponding path program 3 times [2022-11-02 20:58:09,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:09,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465150874] [2022-11-02 20:58:09,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:09,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:58:10,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:10,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465150874] [2022-11-02 20:58:10,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465150874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:10,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140399970] [2022-11-02 20:58:10,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:58:10,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:10,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:10,217 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:10,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:58:10,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-02 20:58:10,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:58:10,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:58:10,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:58:10,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:58:10,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140399970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:58:10,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:58:10,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-02 20:58:10,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809288361] [2022-11-02 20:58:10,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:10,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:58:10,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:10,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:58:10,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:58:10,709 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 197 [2022-11-02 20:58:10,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 182 transitions, 517 flow. Second operand has 23 states, 23 states have (on average 160.43478260869566) internal successors, (3690), 23 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:10,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:10,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 197 [2022-11-02 20:58:10,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:11,093 INFO L130 PetriNetUnfolder]: 3/212 cut-off events. [2022-11-02 20:58:11,093 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-02 20:58:11,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 212 events. 3/212 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 317 event pairs, 0 based on Foata normal form. 3/209 useless extension candidates. Maximal degree in co-relation 263. Up to 17 conditions per place. [2022-11-02 20:58:11,095 INFO L137 encePairwiseOnDemand]: 191/197 looper letters, 25 selfloop transitions, 30 changer transitions 0/208 dead transitions. [2022-11-02 20:58:11,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 208 transitions, 773 flow [2022-11-02 20:58:11,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:58:11,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-02 20:58:11,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4798 transitions. [2022-11-02 20:58:11,107 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.811844331641286 [2022-11-02 20:58:11,107 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4798 transitions. [2022-11-02 20:58:11,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4798 transitions. [2022-11-02 20:58:11,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:11,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4798 transitions. [2022-11-02 20:58:11,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 159.93333333333334) internal successors, (4798), 30 states have internal predecessors, (4798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:11,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 197.0) internal successors, (6107), 31 states have internal predecessors, (6107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:11,140 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 197.0) internal successors, (6107), 31 states have internal predecessors, (6107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:11,141 INFO L175 Difference]: Start difference. First operand has 200 places, 182 transitions, 517 flow. Second operand 30 states and 4798 transitions. [2022-11-02 20:58:11,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 208 transitions, 773 flow [2022-11-02 20:58:11,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 208 transitions, 743 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-02 20:58:11,153 INFO L231 Difference]: Finished difference. Result has 227 places, 192 transitions, 645 flow [2022-11-02 20:58:11,154 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=645, PETRI_PLACES=227, PETRI_TRANSITIONS=192} [2022-11-02 20:58:11,157 INFO L287 CegarLoopForPetriNet]: 165 programPoint places, 62 predicate places. [2022-11-02 20:58:11,157 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 192 transitions, 645 flow [2022-11-02 20:58:11,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 160.43478260869566) internal successors, (3690), 23 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:11,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:11,160 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:11,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:11,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:11,386 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 20:58:11,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:11,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2059256618, now seen corresponding path program 4 times [2022-11-02 20:58:11,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:11,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858515947] [2022-11-02 20:58:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:11,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:58:11,439 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:58:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:58:11,516 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:58:11,516 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:58:11,517 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-02 20:58:11,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-02 20:58:11,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-02 20:58:11,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-02 20:58:11,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:58:11,521 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-11-02 20:58:11,525 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:58:11,526 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-02 20:58:11,578 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 20:58:11,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 269 transitions, 556 flow [2022-11-02 20:58:11,662 INFO L130 PetriNetUnfolder]: 75/438 cut-off events. [2022-11-02 20:58:11,662 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-11-02 20:58:11,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 438 events. 75/438 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1737 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 271. Up to 12 conditions per place. [2022-11-02 20:58:11,667 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 269 transitions, 556 flow [2022-11-02 20:58:11,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 269 transitions, 556 flow [2022-11-02 20:58:11,676 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:58:11,683 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;@5a84bd3d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:58:11,684 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-02 20:58:11,696 INFO L130 PetriNetUnfolder]: 13/134 cut-off events. [2022-11-02 20:58:11,696 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:58:11,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:11,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:11,697 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:58:11,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:11,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1227233360, now seen corresponding path program 1 times [2022-11-02 20:58:11,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:11,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93027518] [2022-11-02 20:58:11,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:11,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:11,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:11,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93027518] [2022-11-02 20:58:11,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93027518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:58:11,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:58:11,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:58:11,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918678642] [2022-11-02 20:58:11,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:58:11,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:58:11,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:11,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:58:11,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:58:11,728 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 269 [2022-11-02 20:58:11,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 269 transitions, 556 flow. Second operand has 2 states, 2 states have (on average 223.5) internal successors, (447), 2 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) [2022-11-02 20:58:11,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:11,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 269 [2022-11-02 20:58:11,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:11,810 INFO L130 PetriNetUnfolder]: 9/367 cut-off events. [2022-11-02 20:58:11,811 INFO L131 PetriNetUnfolder]: For 18/22 co-relation queries the response was YES. [2022-11-02 20:58:11,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 367 events. 9/367 cut-off events. For 18/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1431 event pairs, 0 based on Foata normal form. 91/437 useless extension candidates. Maximal degree in co-relation 230. Up to 7 conditions per place. [2022-11-02 20:58:11,815 INFO L137 encePairwiseOnDemand]: 230/269 looper letters, 4 selfloop transitions, 0 changer transitions 1/227 dead transitions. [2022-11-02 20:58:11,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 227 transitions, 480 flow [2022-11-02 20:58:11,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:58:11,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:58:11,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 489 transitions. [2022-11-02 20:58:11,818 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9089219330855018 [2022-11-02 20:58:11,818 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 489 transitions. [2022-11-02 20:58:11,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 489 transitions. [2022-11-02 20:58:11,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:11,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 489 transitions. [2022-11-02 20:58:11,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 244.5) internal successors, (489), 2 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:11,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:11,822 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:11,822 INFO L175 Difference]: Start difference. First operand has 229 places, 269 transitions, 556 flow. Second operand 2 states and 489 transitions. [2022-11-02 20:58:11,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 227 transitions, 480 flow [2022-11-02 20:58:11,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 227 transitions, 480 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:58:11,828 INFO L231 Difference]: Finished difference. Result has 227 places, 226 transitions, 470 flow [2022-11-02 20:58:11,829 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=470, PETRI_PLACES=227, PETRI_TRANSITIONS=226} [2022-11-02 20:58:11,830 INFO L287 CegarLoopForPetriNet]: 229 programPoint places, -2 predicate places. [2022-11-02 20:58:11,830 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 226 transitions, 470 flow [2022-11-02 20:58:11,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 223.5) internal successors, (447), 2 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) [2022-11-02 20:58:11,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:11,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:11,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:58:11,831 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:58:11,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:11,832 INFO L85 PathProgramCache]: Analyzing trace with hash -2106119919, now seen corresponding path program 1 times [2022-11-02 20:58:11,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:11,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191341258] [2022-11-02 20:58:11,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:11,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:11,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:11,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191341258] [2022-11-02 20:58:11,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191341258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:58:11,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:58:11,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:58:11,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138993316] [2022-11-02 20:58:11,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:58:11,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:58:11,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:11,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:58:11,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:58:11,900 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 269 [2022-11-02 20:58:11,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 226 transitions, 470 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:11,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:11,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 269 [2022-11-02 20:58:11,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:12,031 INFO L130 PetriNetUnfolder]: 9/370 cut-off events. [2022-11-02 20:58:12,031 INFO L131 PetriNetUnfolder]: For 18/22 co-relation queries the response was YES. [2022-11-02 20:58:12,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 370 events. 9/370 cut-off events. For 18/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1427 event pairs, 0 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 398. Up to 14 conditions per place. [2022-11-02 20:58:12,036 INFO L137 encePairwiseOnDemand]: 266/269 looper letters, 13 selfloop transitions, 2 changer transitions 0/230 dead transitions. [2022-11-02 20:58:12,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 230 transitions, 508 flow [2022-11-02 20:58:12,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:58:12,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:58:12,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2022-11-02 20:58:12,039 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8228004956629492 [2022-11-02 20:58:12,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2022-11-02 20:58:12,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2022-11-02 20:58:12,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:12,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2022-11-02 20:58:12,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:12,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:12,044 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:12,044 INFO L175 Difference]: Start difference. First operand has 227 places, 226 transitions, 470 flow. Second operand 3 states and 664 transitions. [2022-11-02 20:58:12,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 230 transitions, 508 flow [2022-11-02 20:58:12,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 230 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:58:12,050 INFO L231 Difference]: Finished difference. Result has 229 places, 227 transitions, 482 flow [2022-11-02 20:58:12,051 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=482, PETRI_PLACES=229, PETRI_TRANSITIONS=227} [2022-11-02 20:58:12,052 INFO L287 CegarLoopForPetriNet]: 229 programPoint places, 0 predicate places. [2022-11-02 20:58:12,052 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 227 transitions, 482 flow [2022-11-02 20:58:12,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:12,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:12,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:12,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:58:12,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:58:12,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:12,056 INFO L85 PathProgramCache]: Analyzing trace with hash 178238190, now seen corresponding path program 1 times [2022-11-02 20:58:12,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:12,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359196987] [2022-11-02 20:58:12,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:12,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:12,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:12,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359196987] [2022-11-02 20:58:12,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359196987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:12,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485704223] [2022-11-02 20:58:12,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:12,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:12,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:12,131 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:12,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:58:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:12,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:58:12,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:58:12,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:58:12,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485704223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:58:12,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:58:12,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-02 20:58:12,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940381853] [2022-11-02 20:58:12,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:58:12,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:58:12,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:12,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:58:12,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:58:12,252 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 269 [2022-11-02 20:58:12,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 227 transitions, 482 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:12,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:12,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 269 [2022-11-02 20:58:12,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:12,331 INFO L130 PetriNetUnfolder]: 7/325 cut-off events. [2022-11-02 20:58:12,332 INFO L131 PetriNetUnfolder]: For 15/34 co-relation queries the response was YES. [2022-11-02 20:58:12,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 325 events. 7/325 cut-off events. For 15/34 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1109 event pairs, 0 based on Foata normal form. 1/310 useless extension candidates. Maximal degree in co-relation 361. Up to 16 conditions per place. [2022-11-02 20:58:12,336 INFO L137 encePairwiseOnDemand]: 266/269 looper letters, 13 selfloop transitions, 2 changer transitions 0/231 dead transitions. [2022-11-02 20:58:12,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 231 transitions, 520 flow [2022-11-02 20:58:12,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:58:12,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:58:12,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2022-11-02 20:58:12,339 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8228004956629492 [2022-11-02 20:58:12,339 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2022-11-02 20:58:12,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2022-11-02 20:58:12,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:12,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2022-11-02 20:58:12,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:12,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:12,344 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:12,345 INFO L175 Difference]: Start difference. First operand has 229 places, 227 transitions, 482 flow. Second operand 3 states and 664 transitions. [2022-11-02 20:58:12,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 231 transitions, 520 flow [2022-11-02 20:58:12,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 231 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:58:12,350 INFO L231 Difference]: Finished difference. Result has 231 places, 228 transitions, 492 flow [2022-11-02 20:58:12,350 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=492, PETRI_PLACES=231, PETRI_TRANSITIONS=228} [2022-11-02 20:58:12,351 INFO L287 CegarLoopForPetriNet]: 229 programPoint places, 2 predicate places. [2022-11-02 20:58:12,351 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 228 transitions, 492 flow [2022-11-02 20:58:12,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:12,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:12,353 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:12,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:12,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:12,566 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:58:12,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:12,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1515379677, now seen corresponding path program 1 times [2022-11-02 20:58:12,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:12,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858768686] [2022-11-02 20:58:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:12,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:58:12,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:12,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858768686] [2022-11-02 20:58:12,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858768686] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:12,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502558431] [2022-11-02 20:58:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:12,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:12,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:12,633 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:12,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:58:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:12,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:58:12,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:58:12,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:58:12,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502558431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:58:12,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:58:12,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:58:12,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408051224] [2022-11-02 20:58:12,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:12,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:58:12,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:12,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:58:12,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:58:12,824 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 269 [2022-11-02 20:58:12,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 228 transitions, 492 flow. Second operand has 10 states, 10 states have (on average 217.2) internal successors, (2172), 10 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:12,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:12,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 269 [2022-11-02 20:58:12,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:12,978 INFO L130 PetriNetUnfolder]: 7/332 cut-off events. [2022-11-02 20:58:12,978 INFO L131 PetriNetUnfolder]: For 19/23 co-relation queries the response was YES. [2022-11-02 20:58:12,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 332 events. 7/332 cut-off events. For 19/23 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1107 event pairs, 0 based on Foata normal form. 2/320 useless extension candidates. Maximal degree in co-relation 379. Up to 11 conditions per place. [2022-11-02 20:58:12,983 INFO L137 encePairwiseOnDemand]: 263/269 looper letters, 14 selfloop transitions, 9 changer transitions 0/238 dead transitions. [2022-11-02 20:58:12,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 238 transitions, 560 flow [2022-11-02 20:58:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:58:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:58:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1960 transitions. [2022-11-02 20:58:12,989 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8095828170177612 [2022-11-02 20:58:12,989 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1960 transitions. [2022-11-02 20:58:12,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1960 transitions. [2022-11-02 20:58:12,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:12,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1960 transitions. [2022-11-02 20:58:12,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 217.77777777777777) internal successors, (1960), 9 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:13,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 269.0) internal successors, (2690), 10 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:13,001 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 269.0) internal successors, (2690), 10 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:13,001 INFO L175 Difference]: Start difference. First operand has 231 places, 228 transitions, 492 flow. Second operand 9 states and 1960 transitions. [2022-11-02 20:58:13,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 238 transitions, 560 flow [2022-11-02 20:58:13,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 238 transitions, 558 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:58:13,006 INFO L231 Difference]: Finished difference. Result has 241 places, 234 transitions, 540 flow [2022-11-02 20:58:13,007 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=540, PETRI_PLACES=241, PETRI_TRANSITIONS=234} [2022-11-02 20:58:13,008 INFO L287 CegarLoopForPetriNet]: 229 programPoint places, 12 predicate places. [2022-11-02 20:58:13,008 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 234 transitions, 540 flow [2022-11-02 20:58:13,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.2) internal successors, (2172), 10 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:13,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:13,009 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:13,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:13,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:58:13,238 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:58:13,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:13,238 INFO L85 PathProgramCache]: Analyzing trace with hash -412502595, now seen corresponding path program 2 times [2022-11-02 20:58:13,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:13,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467448923] [2022-11-02 20:58:13,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:13,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:58:13,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:13,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467448923] [2022-11-02 20:58:13,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467448923] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:13,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333356315] [2022-11-02 20:58:13,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:58:13,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:13,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:13,379 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:13,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:58:13,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:58:13,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:58:13,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:58:13,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:58:13,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:58:13,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333356315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:58:13,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:58:13,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:58:13,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382944590] [2022-11-02 20:58:13,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:13,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:58:13,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:13,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:58:13,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:58:13,653 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 269 [2022-11-02 20:58:13,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 234 transitions, 540 flow. Second operand has 18 states, 18 states have (on average 217.33333333333334) internal successors, (3912), 18 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:13,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:13,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 269 [2022-11-02 20:58:13,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:13,971 INFO L130 PetriNetUnfolder]: 7/352 cut-off events. [2022-11-02 20:58:13,971 INFO L131 PetriNetUnfolder]: For 39/43 co-relation queries the response was YES. [2022-11-02 20:58:13,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 352 events. 7/352 cut-off events. For 39/43 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1110 event pairs, 0 based on Foata normal form. 4/342 useless extension candidates. Maximal degree in co-relation 466. Up to 11 conditions per place. [2022-11-02 20:58:13,976 INFO L137 encePairwiseOnDemand]: 263/269 looper letters, 22 selfloop transitions, 21 changer transitions 0/258 dead transitions. [2022-11-02 20:58:13,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 258 transitions, 734 flow [2022-11-02 20:58:13,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:58:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:58:13,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4562 transitions. [2022-11-02 20:58:13,987 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8075765622234023 [2022-11-02 20:58:13,987 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4562 transitions. [2022-11-02 20:58:13,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4562 transitions. [2022-11-02 20:58:13,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:13,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4562 transitions. [2022-11-02 20:58:14,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 217.23809523809524) internal successors, (4562), 21 states have internal predecessors, (4562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:14,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 269.0) internal successors, (5918), 22 states have internal predecessors, (5918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:14,012 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 269.0) internal successors, (5918), 22 states have internal predecessors, (5918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:14,013 INFO L175 Difference]: Start difference. First operand has 241 places, 234 transitions, 540 flow. Second operand 21 states and 4562 transitions. [2022-11-02 20:58:14,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 258 transitions, 734 flow [2022-11-02 20:58:14,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 258 transitions, 720 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:58:14,019 INFO L231 Difference]: Finished difference. Result has 265 places, 247 transitions, 664 flow [2022-11-02 20:58:14,020 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=664, PETRI_PLACES=265, PETRI_TRANSITIONS=247} [2022-11-02 20:58:14,020 INFO L287 CegarLoopForPetriNet]: 229 programPoint places, 36 predicate places. [2022-11-02 20:58:14,020 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 247 transitions, 664 flow [2022-11-02 20:58:14,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 217.33333333333334) internal successors, (3912), 18 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:14,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:14,022 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:14,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:14,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:58:14,249 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:58:14,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:14,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2002198147, now seen corresponding path program 3 times [2022-11-02 20:58:14,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:14,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661768235] [2022-11-02 20:58:14,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:14,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:58:14,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:14,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661768235] [2022-11-02 20:58:14,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661768235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:14,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370795554] [2022-11-02 20:58:14,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:58:14,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:14,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:14,658 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:14,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:58:14,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-02 20:58:14,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:58:14,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:58:14,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:58:14,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:15,181 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:58:15,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370795554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:58:15,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:58:15,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-02 20:58:15,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759749460] [2022-11-02 20:58:15,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:15,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:58:15,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:15,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:58:15,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:58:15,190 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 269 [2022-11-02 20:58:15,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 247 transitions, 664 flow. Second operand has 23 states, 23 states have (on average 217.47826086956522) internal successors, (5002), 23 states have internal predecessors, (5002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:15,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:15,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 269 [2022-11-02 20:58:15,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:15,658 INFO L130 PetriNetUnfolder]: 7/367 cut-off events. [2022-11-02 20:58:15,659 INFO L131 PetriNetUnfolder]: For 127/131 co-relation queries the response was YES. [2022-11-02 20:58:15,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 367 events. 7/367 cut-off events. For 127/131 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1108 event pairs, 0 based on Foata normal form. 3/356 useless extension candidates. Maximal degree in co-relation 562. Up to 17 conditions per place. [2022-11-02 20:58:15,664 INFO L137 encePairwiseOnDemand]: 263/269 looper letters, 28 selfloop transitions, 30 changer transitions 0/273 dead transitions. [2022-11-02 20:58:15,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 273 transitions, 926 flow [2022-11-02 20:58:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:58:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-02 20:58:15,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6511 transitions. [2022-11-02 20:58:15,678 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8068153655514251 [2022-11-02 20:58:15,678 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6511 transitions. [2022-11-02 20:58:15,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6511 transitions. [2022-11-02 20:58:15,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:15,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6511 transitions. [2022-11-02 20:58:15,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 217.03333333333333) internal successors, (6511), 30 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:15,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 269.0) internal successors, (8339), 31 states have internal predecessors, (8339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:15,723 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 269.0) internal successors, (8339), 31 states have internal predecessors, (8339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:15,723 INFO L175 Difference]: Start difference. First operand has 265 places, 247 transitions, 664 flow. Second operand 30 states and 6511 transitions. [2022-11-02 20:58:15,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 273 transitions, 926 flow [2022-11-02 20:58:15,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 273 transitions, 896 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-02 20:58:15,733 INFO L231 Difference]: Finished difference. Result has 292 places, 257 transitions, 792 flow [2022-11-02 20:58:15,733 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=792, PETRI_PLACES=292, PETRI_TRANSITIONS=257} [2022-11-02 20:58:15,734 INFO L287 CegarLoopForPetriNet]: 229 programPoint places, 63 predicate places. [2022-11-02 20:58:15,734 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 257 transitions, 792 flow [2022-11-02 20:58:15,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 217.47826086956522) internal successors, (5002), 23 states have internal predecessors, (5002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:15,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:15,737 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:15,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:15,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:15,966 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:58:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:15,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1312549664, now seen corresponding path program 4 times [2022-11-02 20:58:15,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:15,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352220281] [2022-11-02 20:58:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:15,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:58:16,018 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:58:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:58:16,072 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:58:16,072 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:58:16,073 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-02 20:58:16,073 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-02 20:58:16,074 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-02 20:58:16,074 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-02 20:58:16,074 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-02 20:58:16,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 20:58:16,075 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-11-02 20:58:16,075 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:58:16,076 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-02 20:58:16,122 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-02 20:58:16,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 341 transitions, 712 flow [2022-11-02 20:58:16,240 INFO L130 PetriNetUnfolder]: 110/640 cut-off events. [2022-11-02 20:58:16,240 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-11-02 20:58:16,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 640 events. 110/640 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2834 event pairs, 1 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 446. Up to 16 conditions per place. [2022-11-02 20:58:16,252 INFO L82 GeneralOperation]: Start removeDead. Operand has 289 places, 341 transitions, 712 flow [2022-11-02 20:58:16,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 341 transitions, 712 flow [2022-11-02 20:58:16,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:58:16,263 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;@5a84bd3d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:58:16,263 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-02 20:58:16,273 INFO L130 PetriNetUnfolder]: 14/136 cut-off events. [2022-11-02 20:58:16,274 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:58:16,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:16,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:16,274 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:58:16,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:16,275 INFO L85 PathProgramCache]: Analyzing trace with hash -570951761, now seen corresponding path program 1 times [2022-11-02 20:58:16,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:16,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442015876] [2022-11-02 20:58:16,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:16,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:16,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:16,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442015876] [2022-11-02 20:58:16,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442015876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:58:16,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:58:16,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:58:16,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647705079] [2022-11-02 20:58:16,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:58:16,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:58:16,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:16,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:58:16,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:58:16,297 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 341 [2022-11-02 20:58:16,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 341 transitions, 712 flow. Second operand has 2 states, 2 states have (on average 281.0) internal successors, (562), 2 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:16,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:16,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 341 [2022-11-02 20:58:16,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:16,431 INFO L130 PetriNetUnfolder]: 16/539 cut-off events. [2022-11-02 20:58:16,431 INFO L131 PetriNetUnfolder]: For 53/68 co-relation queries the response was YES. [2022-11-02 20:58:16,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 539 events. 16/539 cut-off events. For 53/68 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2470 event pairs, 1 based on Foata normal form. 209/717 useless extension candidates. Maximal degree in co-relation 381. Up to 16 conditions per place. [2022-11-02 20:58:16,441 INFO L137 encePairwiseOnDemand]: 290/341 looper letters, 6 selfloop transitions, 0 changer transitions 1/286 dead transitions. [2022-11-02 20:58:16,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 286 transitions, 614 flow [2022-11-02 20:58:16,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:58:16,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:58:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 617 transitions. [2022-11-02 20:58:16,444 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9046920821114369 [2022-11-02 20:58:16,444 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 617 transitions. [2022-11-02 20:58:16,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 617 transitions. [2022-11-02 20:58:16,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:16,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 617 transitions. [2022-11-02 20:58:16,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 308.5) internal successors, (617), 2 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:16,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:16,447 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:16,448 INFO L175 Difference]: Start difference. First operand has 289 places, 341 transitions, 712 flow. Second operand 2 states and 617 transitions. [2022-11-02 20:58:16,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 286 transitions, 614 flow [2022-11-02 20:58:16,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 286 transitions, 614 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:58:16,453 INFO L231 Difference]: Finished difference. Result has 286 places, 285 transitions, 600 flow [2022-11-02 20:58:16,454 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=600, PETRI_PLACES=286, PETRI_TRANSITIONS=285} [2022-11-02 20:58:16,455 INFO L287 CegarLoopForPetriNet]: 289 programPoint places, -3 predicate places. [2022-11-02 20:58:16,455 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 285 transitions, 600 flow [2022-11-02 20:58:16,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 281.0) internal successors, (562), 2 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:16,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:16,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:16,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 20:58:16,456 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:58:16,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:16,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1898214065, now seen corresponding path program 1 times [2022-11-02 20:58:16,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:16,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657448167] [2022-11-02 20:58:16,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:16,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:16,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:16,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657448167] [2022-11-02 20:58:16,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657448167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:58:16,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:58:16,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:58:16,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142428883] [2022-11-02 20:58:16,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:58:16,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:58:16,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:16,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:58:16,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:58:16,498 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 341 [2022-11-02 20:58:16,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 285 transitions, 600 flow. Second operand has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:16,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:16,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 341 [2022-11-02 20:58:16,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:16,635 INFO L130 PetriNetUnfolder]: 16/542 cut-off events. [2022-11-02 20:58:16,636 INFO L131 PetriNetUnfolder]: For 53/68 co-relation queries the response was YES. [2022-11-02 20:58:16,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 542 events. 16/542 cut-off events. For 53/68 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2477 event pairs, 1 based on Foata normal form. 0/512 useless extension candidates. Maximal degree in co-relation 592. Up to 23 conditions per place. [2022-11-02 20:58:16,646 INFO L137 encePairwiseOnDemand]: 338/341 looper letters, 15 selfloop transitions, 2 changer transitions 0/289 dead transitions. [2022-11-02 20:58:16,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 289 transitions, 642 flow [2022-11-02 20:58:16,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:58:16,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:58:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 837 transitions. [2022-11-02 20:58:16,648 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2022-11-02 20:58:16,649 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 837 transitions. [2022-11-02 20:58:16,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 837 transitions. [2022-11-02 20:58:16,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:16,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 837 transitions. [2022-11-02 20:58:16,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:16,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:16,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:16,653 INFO L175 Difference]: Start difference. First operand has 286 places, 285 transitions, 600 flow. Second operand 3 states and 837 transitions. [2022-11-02 20:58:16,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 289 transitions, 642 flow [2022-11-02 20:58:16,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 289 transitions, 642 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:58:16,660 INFO L231 Difference]: Finished difference. Result has 288 places, 286 transitions, 612 flow [2022-11-02 20:58:16,660 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=612, PETRI_PLACES=288, PETRI_TRANSITIONS=286} [2022-11-02 20:58:16,661 INFO L287 CegarLoopForPetriNet]: 289 programPoint places, -1 predicate places. [2022-11-02 20:58:16,661 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 286 transitions, 612 flow [2022-11-02 20:58:16,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:16,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:16,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:16,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 20:58:16,663 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:58:16,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:16,664 INFO L85 PathProgramCache]: Analyzing trace with hash -163255965, now seen corresponding path program 1 times [2022-11-02 20:58:16,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:16,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111564159] [2022-11-02 20:58:16,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:16,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:16,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:16,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111564159] [2022-11-02 20:58:16,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111564159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:16,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480107583] [2022-11-02 20:58:16,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:16,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:16,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:16,733 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:16,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:58:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:16,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:58:16,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:58:16,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:58:16,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480107583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:58:16,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:58:16,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-02 20:58:16,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144231493] [2022-11-02 20:58:16,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:58:16,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:58:16,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:16,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:58:16,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:58:16,873 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 341 [2022-11-02 20:58:16,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 286 transitions, 612 flow. Second operand has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:16,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:16,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 341 [2022-11-02 20:58:16,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:17,008 INFO L130 PetriNetUnfolder]: 14/497 cut-off events. [2022-11-02 20:58:17,008 INFO L131 PetriNetUnfolder]: For 62/152 co-relation queries the response was YES. [2022-11-02 20:58:17,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 497 events. 14/497 cut-off events. For 62/152 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2130 event pairs, 1 based on Foata normal form. 1/472 useless extension candidates. Maximal degree in co-relation 560. Up to 30 conditions per place. [2022-11-02 20:58:17,018 INFO L137 encePairwiseOnDemand]: 338/341 looper letters, 15 selfloop transitions, 2 changer transitions 0/290 dead transitions. [2022-11-02 20:58:17,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 290 transitions, 654 flow [2022-11-02 20:58:17,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:58:17,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:58:17,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 837 transitions. [2022-11-02 20:58:17,022 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2022-11-02 20:58:17,022 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 837 transitions. [2022-11-02 20:58:17,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 837 transitions. [2022-11-02 20:58:17,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:17,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 837 transitions. [2022-11-02 20:58:17,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:17,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:17,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:17,028 INFO L175 Difference]: Start difference. First operand has 288 places, 286 transitions, 612 flow. Second operand 3 states and 837 transitions. [2022-11-02 20:58:17,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 290 transitions, 654 flow [2022-11-02 20:58:17,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 290 transitions, 652 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:58:17,035 INFO L231 Difference]: Finished difference. Result has 290 places, 287 transitions, 622 flow [2022-11-02 20:58:17,035 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=622, PETRI_PLACES=290, PETRI_TRANSITIONS=287} [2022-11-02 20:58:17,036 INFO L287 CegarLoopForPetriNet]: 289 programPoint places, 1 predicate places. [2022-11-02 20:58:17,036 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 287 transitions, 622 flow [2022-11-02 20:58:17,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:17,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:17,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:17,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:17,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:58:17,262 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:58:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:17,262 INFO L85 PathProgramCache]: Analyzing trace with hash -522046394, now seen corresponding path program 1 times [2022-11-02 20:58:17,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:17,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807457027] [2022-11-02 20:58:17,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:17,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:58:17,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:17,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807457027] [2022-11-02 20:58:17,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807457027] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:17,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393440408] [2022-11-02 20:58:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:17,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:17,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:17,331 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:17,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:58:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:17,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:58:17,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:58:17,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:58:17,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393440408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:58:17,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:58:17,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:58:17,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172973401] [2022-11-02 20:58:17,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:17,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:58:17,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:17,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:58:17,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:58:17,515 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 341 [2022-11-02 20:58:17,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 287 transitions, 622 flow. Second operand has 10 states, 10 states have (on average 274.1) internal successors, (2741), 10 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:17,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:17,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 341 [2022-11-02 20:58:17,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:17,727 INFO L130 PetriNetUnfolder]: 14/504 cut-off events. [2022-11-02 20:58:17,728 INFO L131 PetriNetUnfolder]: For 54/69 co-relation queries the response was YES. [2022-11-02 20:58:17,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 504 events. 14/504 cut-off events. For 54/69 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2146 event pairs, 1 based on Foata normal form. 2/483 useless extension candidates. Maximal degree in co-relation 575. Up to 20 conditions per place. [2022-11-02 20:58:17,737 INFO L137 encePairwiseOnDemand]: 335/341 looper letters, 16 selfloop transitions, 9 changer transitions 0/297 dead transitions. [2022-11-02 20:58:17,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 297 transitions, 694 flow [2022-11-02 20:58:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:58:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:58:17,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2475 transitions. [2022-11-02 20:58:17,741 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8064516129032258 [2022-11-02 20:58:17,741 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2475 transitions. [2022-11-02 20:58:17,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2475 transitions. [2022-11-02 20:58:17,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:17,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2475 transitions. [2022-11-02 20:58:17,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 275.0) internal successors, (2475), 9 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:17,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:17,751 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:17,752 INFO L175 Difference]: Start difference. First operand has 290 places, 287 transitions, 622 flow. Second operand 9 states and 2475 transitions. [2022-11-02 20:58:17,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 297 transitions, 694 flow [2022-11-02 20:58:17,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 297 transitions, 692 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:58:17,758 INFO L231 Difference]: Finished difference. Result has 300 places, 293 transitions, 670 flow [2022-11-02 20:58:17,759 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=670, PETRI_PLACES=300, PETRI_TRANSITIONS=293} [2022-11-02 20:58:17,760 INFO L287 CegarLoopForPetriNet]: 289 programPoint places, 11 predicate places. [2022-11-02 20:58:17,760 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 293 transitions, 670 flow [2022-11-02 20:58:17,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 274.1) internal successors, (2741), 10 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:17,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:17,761 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:17,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:17,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:58:17,989 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:58:17,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:17,990 INFO L85 PathProgramCache]: Analyzing trace with hash -2078839546, now seen corresponding path program 2 times [2022-11-02 20:58:17,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:17,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710717385] [2022-11-02 20:58:17,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:17,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 20:58:18,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:18,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710717385] [2022-11-02 20:58:18,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710717385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:18,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190939714] [2022-11-02 20:58:18,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:58:18,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:18,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:18,073 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:18,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:58:18,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:58:18,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:58:18,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:58:18,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:58:18,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:58:18,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190939714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:58:18,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:58:18,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-02 20:58:18,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644294192] [2022-11-02 20:58:18,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:18,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:58:18,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:18,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:58:18,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:58:18,413 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 341 [2022-11-02 20:58:18,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 293 transitions, 670 flow. Second operand has 19 states, 19 states have (on average 268.05263157894734) internal successors, (5093), 19 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:18,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:18,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 341 [2022-11-02 20:58:18,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:18,867 INFO L130 PetriNetUnfolder]: 12/479 cut-off events. [2022-11-02 20:58:18,868 INFO L131 PetriNetUnfolder]: For 65/87 co-relation queries the response was YES. [2022-11-02 20:58:18,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 479 events. 12/479 cut-off events. For 65/87 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1719 event pairs, 2 based on Foata normal form. 6/464 useless extension candidates. Maximal degree in co-relation 636. Up to 29 conditions per place. [2022-11-02 20:58:18,878 INFO L137 encePairwiseOnDemand]: 330/341 looper letters, 35 selfloop transitions, 26 changer transitions 0/325 dead transitions. [2022-11-02 20:58:18,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 325 transitions, 918 flow [2022-11-02 20:58:18,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 20:58:18,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-02 20:58:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6691 transitions. [2022-11-02 20:58:18,890 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7848680351906159 [2022-11-02 20:58:18,890 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6691 transitions. [2022-11-02 20:58:18,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6691 transitions. [2022-11-02 20:58:18,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:18,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6691 transitions. [2022-11-02 20:58:18,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 267.64) internal successors, (6691), 25 states have internal predecessors, (6691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:18,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 341.0) internal successors, (8866), 26 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:18,922 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 341.0) internal successors, (8866), 26 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:18,922 INFO L175 Difference]: Start difference. First operand has 300 places, 293 transitions, 670 flow. Second operand 25 states and 6691 transitions. [2022-11-02 20:58:18,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 325 transitions, 918 flow [2022-11-02 20:58:18,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 325 transitions, 904 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:58:18,930 INFO L231 Difference]: Finished difference. Result has 331 places, 309 transitions, 828 flow [2022-11-02 20:58:18,931 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=828, PETRI_PLACES=331, PETRI_TRANSITIONS=309} [2022-11-02 20:58:18,931 INFO L287 CegarLoopForPetriNet]: 289 programPoint places, 42 predicate places. [2022-11-02 20:58:18,931 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 309 transitions, 828 flow [2022-11-02 20:58:18,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 268.05263157894734) internal successors, (5093), 19 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:18,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:18,933 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:18,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:19,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:58:19,153 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:58:19,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:19,153 INFO L85 PathProgramCache]: Analyzing trace with hash -497132495, now seen corresponding path program 1 times [2022-11-02 20:58:19,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:19,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398079944] [2022-11-02 20:58:19,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:19,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:19,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:19,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398079944] [2022-11-02 20:58:19,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398079944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:19,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176194045] [2022-11-02 20:58:19,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:19,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:19,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:19,478 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:19,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:58:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:19,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:58:19,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:19,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:19,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176194045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:58:19,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:58:19,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-02 20:58:19,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280651018] [2022-11-02 20:58:19,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:19,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:58:19,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:19,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:58:19,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:58:19,964 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 341 [2022-11-02 20:58:19,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 309 transitions, 828 flow. Second operand has 23 states, 23 states have (on average 274.4347826086956) internal successors, (6312), 23 states have internal predecessors, (6312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:19,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:19,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 341 [2022-11-02 20:58:19,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:58:20,456 INFO L130 PetriNetUnfolder]: 12/494 cut-off events. [2022-11-02 20:58:20,457 INFO L131 PetriNetUnfolder]: For 169/173 co-relation queries the response was YES. [2022-11-02 20:58:20,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 494 events. 12/494 cut-off events. For 169/173 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1721 event pairs, 2 based on Foata normal form. 3/476 useless extension candidates. Maximal degree in co-relation 728. Up to 20 conditions per place. [2022-11-02 20:58:20,467 INFO L137 encePairwiseOnDemand]: 335/341 looper letters, 30 selfloop transitions, 30 changer transitions 0/335 dead transitions. [2022-11-02 20:58:20,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 335 transitions, 1094 flow [2022-11-02 20:58:20,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:58:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-02 20:58:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8223 transitions. [2022-11-02 20:58:20,478 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8038123167155425 [2022-11-02 20:58:20,478 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8223 transitions. [2022-11-02 20:58:20,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8223 transitions. [2022-11-02 20:58:20,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:58:20,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8223 transitions. [2022-11-02 20:58:20,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 274.1) internal successors, (8223), 30 states have internal predecessors, (8223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:20,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 341.0) internal successors, (10571), 31 states have internal predecessors, (10571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:20,511 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 341.0) internal successors, (10571), 31 states have internal predecessors, (10571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:20,511 INFO L175 Difference]: Start difference. First operand has 331 places, 309 transitions, 828 flow. Second operand 30 states and 8223 transitions. [2022-11-02 20:58:20,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 335 transitions, 1094 flow [2022-11-02 20:58:20,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 335 transitions, 1060 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-11-02 20:58:20,521 INFO L231 Difference]: Finished difference. Result has 357 places, 319 transitions, 952 flow [2022-11-02 20:58:20,523 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=952, PETRI_PLACES=357, PETRI_TRANSITIONS=319} [2022-11-02 20:58:20,523 INFO L287 CegarLoopForPetriNet]: 289 programPoint places, 68 predicate places. [2022-11-02 20:58:20,524 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 319 transitions, 952 flow [2022-11-02 20:58:20,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 274.4347826086956) internal successors, (6312), 23 states have internal predecessors, (6312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:20,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:58:20,526 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:20,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:20,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82a153a0-b47b-41ac-8880-396836d17d50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:20,742 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:58:20,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:20,742 INFO L85 PathProgramCache]: Analyzing trace with hash 28146467, now seen corresponding path program 2 times [2022-11-02 20:58:20,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:20,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704044429] [2022-11-02 20:58:20,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:20,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-02 20:58:22,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:22,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704044429] [2022-11-02 20:58:22,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704044429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:58:22,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:58:22,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-02 20:58:22,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429407054] [2022-11-02 20:58:22,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:58:22,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:58:22,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:22,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:58:22,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:58:22,236 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 341 [2022-11-02 20:58:22,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 319 transitions, 952 flow. Second operand has 16 states, 16 states have (on average 194.125) internal successors, (3106), 16 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:22,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:58:22,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 341 [2022-11-02 20:58:22,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand