./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:25:23,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:25:23,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:25:23,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:25:23,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:25:23,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:25:23,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:25:23,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:25:23,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:25:23,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:25:23,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:25:23,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:25:23,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:25:23,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:25:23,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:25:23,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:25:23,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:25:23,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:25:23,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:25:23,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:25:23,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:25:23,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:25:23,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:25:23,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:25:23,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:25:23,506 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:25:23,507 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:25:23,509 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:25:23,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:25:23,511 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:25:23,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:25:23,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:25:23,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:25:23,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:25:23,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:25:23,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:25:23,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:25:23,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:25:23,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:25:23,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:25:23,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:25:23,525 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:25:23,569 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:25:23,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:25:23,570 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:25:23,570 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:25:23,571 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:25:23,572 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:25:23,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:25:23,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:25:23,573 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:25:23,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:25:23,575 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:25:23,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:25:23,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:25:23,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:25:23,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:25:23,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:25:23,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:25:23,576 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:25:23,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:25:23,577 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:25:23,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:25:23,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:25:23,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:25:23,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:25:23,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:25:23,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:25:23,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:25:23,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:25:23,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:25:23,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:25:23,581 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:25:23,582 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:25:23,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:25:23,582 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_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a [2022-11-18 20:25:23,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:25:24,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:25:24,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:25:24,012 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:25:24,013 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:25:24,014 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2022-11-18 20:25:24,087 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/data/9b6ecc1bb/8b6ce560badf45539acda78932de3cce/FLAG586d80501 [2022-11-18 20:25:24,753 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:25:24,753 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2022-11-18 20:25:24,776 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/data/9b6ecc1bb/8b6ce560badf45539acda78932de3cce/FLAG586d80501 [2022-11-18 20:25:24,986 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/data/9b6ecc1bb/8b6ce560badf45539acda78932de3cce [2022-11-18 20:25:24,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:25:24,991 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:25:24,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:25:25,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:25:25,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:25:25,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:25:24" (1/1) ... [2022-11-18 20:25:25,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@786301ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:25, skipping insertion in model container [2022-11-18 20:25:25,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:25:24" (1/1) ... [2022-11-18 20:25:25,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:25:25,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:25:25,408 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-11-18 20:25:26,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:25:26,083 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:25:26,102 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-11-18 20:25:26,155 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:25:26,254 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:25:26,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:26 WrapperNode [2022-11-18 20:25:26,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:25:26,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:25:26,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:25:26,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:25:26,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:26" (1/1) ... [2022-11-18 20:25:26,303 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:26" (1/1) ... [2022-11-18 20:25:26,349 INFO L138 Inliner]: procedures = 364, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2022-11-18 20:25:26,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:25:26,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:25:26,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:25:26,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:25:26,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:26" (1/1) ... [2022-11-18 20:25:26,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:26" (1/1) ... [2022-11-18 20:25:26,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:26" (1/1) ... [2022-11-18 20:25:26,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:26" (1/1) ... [2022-11-18 20:25:26,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:26" (1/1) ... [2022-11-18 20:25:26,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:26" (1/1) ... [2022-11-18 20:25:26,404 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:26" (1/1) ... [2022-11-18 20:25:26,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:26" (1/1) ... [2022-11-18 20:25:26,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:25:26,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:25:26,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:25:26,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:25:26,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:26" (1/1) ... [2022-11-18 20:25:26,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:25:26,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:26,456 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:25:26,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:25:26,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:25:26,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:25:26,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:25:26,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:25:26,502 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 20:25:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:25:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2022-11-18 20:25:26,503 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2022-11-18 20:25:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:25:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:25:26,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:25:26,506 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:25:26,663 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:25:26,665 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:25:26,945 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:25:26,953 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:25:26,953 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 20:25:26,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:25:26 BoogieIcfgContainer [2022-11-18 20:25:26,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:25:26,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:25:26,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:25:26,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:25:26,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:25:24" (1/3) ... [2022-11-18 20:25:26,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a95698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:25:26, skipping insertion in model container [2022-11-18 20:25:26,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:26" (2/3) ... [2022-11-18 20:25:26,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a95698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:25:26, skipping insertion in model container [2022-11-18 20:25:26,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:25:26" (3/3) ... [2022-11-18 20:25:26,970 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2022-11-18 20:25:26,980 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:25:27,001 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:25:27,002 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:25:27,002 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:25:27,145 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-18 20:25:27,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 92 transitions, 192 flow [2022-11-18 20:25:27,253 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-11-18 20:25:27,253 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:25:27,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 91 events. 7/91 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2022-11-18 20:25:27,260 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 92 transitions, 192 flow [2022-11-18 20:25:27,265 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 81 transitions, 168 flow [2022-11-18 20:25:27,279 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:25:27,287 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;@58a7338d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:25:27,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 20:25:27,319 INFO L130 PetriNetUnfolder]: 6/80 cut-off events. [2022-11-18 20:25:27,319 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:25:27,319 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:25:27,320 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:27,321 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:25:27,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:27,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1266078087, now seen corresponding path program 1 times [2022-11-18 20:25:27,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:27,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099468011] [2022-11-18 20:25:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:27,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:27,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:27,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099468011] [2022-11-18 20:25:27,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099468011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:25:27,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:25:27,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:25:27,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729471426] [2022-11-18 20:25:27,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:25:27,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:25:27,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:27,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:25:27,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:25:27,802 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 92 [2022-11-18 20:25:27,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 168 flow. Second operand has 2 states, 2 states have (on average 84.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:27,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:25:27,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 92 [2022-11-18 20:25:27,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:25:27,883 INFO L130 PetriNetUnfolder]: 2/75 cut-off events. [2022-11-18 20:25:27,883 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-18 20:25:27,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 75 events. 2/75 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 4/76 useless extension candidates. Maximal degree in co-relation 35. Up to 3 conditions per place. [2022-11-18 20:25:27,885 INFO L137 encePairwiseOnDemand]: 88/92 looper letters, 2 selfloop transitions, 0 changer transitions 0/75 dead transitions. [2022-11-18 20:25:27,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 75 transitions, 160 flow [2022-11-18 20:25:27,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:25:27,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:25:27,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 170 transitions. [2022-11-18 20:25:27,902 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9239130434782609 [2022-11-18 20:25:27,903 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 170 transitions. [2022-11-18 20:25:27,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 170 transitions. [2022-11-18 20:25:27,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:25:27,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 170 transitions. [2022-11-18 20:25:27,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 85.0) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:27,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:27,928 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:27,931 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 168 flow. Second operand 2 states and 170 transitions. [2022-11-18 20:25:27,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 75 transitions, 160 flow [2022-11-18 20:25:27,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 20:25:27,946 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 152 flow [2022-11-18 20:25:27,948 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=152, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2022-11-18 20:25:27,953 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2022-11-18 20:25:27,953 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 152 flow [2022-11-18 20:25:27,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 84.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:27,954 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:25:27,955 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:27,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:25:27,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:25:27,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:27,958 INFO L85 PathProgramCache]: Analyzing trace with hash 398088453, now seen corresponding path program 1 times [2022-11-18 20:25:27,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:27,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978458695] [2022-11-18 20:25:27,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:27,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:25:28,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:28,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978458695] [2022-11-18 20:25:28,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978458695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:25:28,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:25:28,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:25:28,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736851275] [2022-11-18 20:25:28,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:25:28,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:25:28,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:28,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:25:28,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:25:28,181 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-11-18 20:25:28,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:28,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:25:28,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-11-18 20:25:28,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:25:28,255 INFO L130 PetriNetUnfolder]: 2/82 cut-off events. [2022-11-18 20:25:28,255 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:25:28,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 82 events. 2/82 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 95. Up to 10 conditions per place. [2022-11-18 20:25:28,262 INFO L137 encePairwiseOnDemand]: 89/92 looper letters, 10 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2022-11-18 20:25:28,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 78 transitions, 182 flow [2022-11-18 20:25:28,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:25:28,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:25:28,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2022-11-18 20:25:28,269 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8623188405797102 [2022-11-18 20:25:28,271 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 238 transitions. [2022-11-18 20:25:28,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 238 transitions. [2022-11-18 20:25:28,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:25:28,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 238 transitions. [2022-11-18 20:25:28,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:28,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:28,279 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:28,279 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 152 flow. Second operand 3 states and 238 transitions. [2022-11-18 20:25:28,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 78 transitions, 182 flow [2022-11-18 20:25:28,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 78 transitions, 182 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:25:28,283 INFO L231 Difference]: Finished difference. Result has 79 places, 76 transitions, 164 flow [2022-11-18 20:25:28,284 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=79, PETRI_TRANSITIONS=76} [2022-11-18 20:25:28,285 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 0 predicate places. [2022-11-18 20:25:28,285 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 76 transitions, 164 flow [2022-11-18 20:25:28,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:28,285 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:25:28,286 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:28,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:25:28,286 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:25:28,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:28,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1458126153, now seen corresponding path program 1 times [2022-11-18 20:25:28,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:28,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501095544] [2022-11-18 20:25:28,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:28,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:28,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:25:28,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:28,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501095544] [2022-11-18 20:25:28,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501095544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:25:28,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:25:28,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:25:28,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841480566] [2022-11-18 20:25:28,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:25:28,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:25:28,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:28,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:25:28,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:25:28,478 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 92 [2022-11-18 20:25:28,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:28,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:25:28,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 92 [2022-11-18 20:25:28,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:25:28,515 INFO L130 PetriNetUnfolder]: 2/92 cut-off events. [2022-11-18 20:25:28,516 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:25:28,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 92 events. 2/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 76 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 109. Up to 9 conditions per place. [2022-11-18 20:25:28,518 INFO L137 encePairwiseOnDemand]: 89/92 looper letters, 9 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2022-11-18 20:25:28,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 79 transitions, 192 flow [2022-11-18 20:25:28,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:25:28,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:25:28,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2022-11-18 20:25:28,522 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8695652173913043 [2022-11-18 20:25:28,523 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2022-11-18 20:25:28,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2022-11-18 20:25:28,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:25:28,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2022-11-18 20:25:28,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:28,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:28,528 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:28,528 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 164 flow. Second operand 3 states and 240 transitions. [2022-11-18 20:25:28,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 79 transitions, 192 flow [2022-11-18 20:25:28,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 79 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:25:28,533 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 174 flow [2022-11-18 20:25:28,533 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2022-11-18 20:25:28,537 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 2 predicate places. [2022-11-18 20:25:28,537 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 174 flow [2022-11-18 20:25:28,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:28,538 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:25:28,538 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:28,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:25:28,539 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:25:28,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:28,540 INFO L85 PathProgramCache]: Analyzing trace with hash -238343497, now seen corresponding path program 1 times [2022-11-18 20:25:28,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:28,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159053366] [2022-11-18 20:25:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:28,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:25:28,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:28,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159053366] [2022-11-18 20:25:28,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159053366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:28,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413865512] [2022-11-18 20:25:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:28,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:28,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:28,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:28,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:25:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:28,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:25:28,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:25:29,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:25:29,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413865512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:29,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:29,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 20:25:29,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781539027] [2022-11-18 20:25:29,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:29,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:25:29,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:29,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:25:29,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:25:29,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-11-18 20:25:29,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 174 flow. Second operand has 10 states, 10 states have (on average 76.9) internal successors, (769), 10 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:29,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:25:29,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-11-18 20:25:29,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:25:29,225 INFO L130 PetriNetUnfolder]: 2/105 cut-off events. [2022-11-18 20:25:29,225 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-18 20:25:29,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 105 events. 2/105 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 57 event pairs, 0 based on Foata normal form. 2/106 useless extension candidates. Maximal degree in co-relation 134. Up to 7 conditions per place. [2022-11-18 20:25:29,233 INFO L137 encePairwiseOnDemand]: 86/92 looper letters, 9 selfloop transitions, 9 changer transitions 0/85 dead transitions. [2022-11-18 20:25:29,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 85 transitions, 228 flow [2022-11-18 20:25:29,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:25:29,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:25:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 695 transitions. [2022-11-18 20:25:29,239 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8393719806763285 [2022-11-18 20:25:29,239 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 695 transitions. [2022-11-18 20:25:29,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 695 transitions. [2022-11-18 20:25:29,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:25:29,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 695 transitions. [2022-11-18 20:25:29,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 77.22222222222223) internal successors, (695), 9 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:29,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:29,248 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:29,248 INFO L175 Difference]: Start difference. First operand has 81 places, 77 transitions, 174 flow. Second operand 9 states and 695 transitions. [2022-11-18 20:25:29,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 85 transitions, 228 flow [2022-11-18 20:25:29,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 85 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:25:29,252 INFO L231 Difference]: Finished difference. Result has 91 places, 83 transitions, 222 flow [2022-11-18 20:25:29,252 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=222, PETRI_PLACES=91, PETRI_TRANSITIONS=83} [2022-11-18 20:25:29,253 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 12 predicate places. [2022-11-18 20:25:29,253 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 83 transitions, 222 flow [2022-11-18 20:25:29,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 76.9) internal successors, (769), 10 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:29,254 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:25:29,255 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:29,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 20:25:29,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:29,461 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:25:29,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:29,461 INFO L85 PathProgramCache]: Analyzing trace with hash -854969481, now seen corresponding path program 2 times [2022-11-18 20:25:29,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:29,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813452141] [2022-11-18 20:25:29,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:29,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:29,686 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 20:25:29,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:29,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813452141] [2022-11-18 20:25:29,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813452141] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:29,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415538457] [2022-11-18 20:25:29,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:25:29,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:29,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:29,688 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:29,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:25:29,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:25:29,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:29,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:25:29,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 20:25:29,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 20:25:29,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415538457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:29,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:29,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 20:25:29,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314404681] [2022-11-18 20:25:29,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:29,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:25:29,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:29,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:25:29,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:25:29,912 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 92 [2022-11-18 20:25:29,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 83 transitions, 222 flow. Second operand has 10 states, 10 states have (on average 76.0) internal successors, (760), 10 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:29,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:25:29,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 92 [2022-11-18 20:25:29,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:25:30,007 INFO L130 PetriNetUnfolder]: 2/115 cut-off events. [2022-11-18 20:25:30,008 INFO L131 PetriNetUnfolder]: For 7/21 co-relation queries the response was YES. [2022-11-18 20:25:30,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 115 events. 2/115 cut-off events. For 7/21 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 9/123 useless extension candidates. Maximal degree in co-relation 165. Up to 8 conditions per place. [2022-11-18 20:25:30,009 INFO L137 encePairwiseOnDemand]: 86/92 looper letters, 10 selfloop transitions, 9 changer transitions 0/91 dead transitions. [2022-11-18 20:25:30,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 91 transitions, 278 flow [2022-11-18 20:25:30,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:25:30,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:25:30,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 687 transitions. [2022-11-18 20:25:30,012 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8297101449275363 [2022-11-18 20:25:30,012 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 687 transitions. [2022-11-18 20:25:30,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 687 transitions. [2022-11-18 20:25:30,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:25:30,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 687 transitions. [2022-11-18 20:25:30,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 76.33333333333333) internal successors, (687), 9 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:30,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:30,018 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:30,018 INFO L175 Difference]: Start difference. First operand has 91 places, 83 transitions, 222 flow. Second operand 9 states and 687 transitions. [2022-11-18 20:25:30,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 91 transitions, 278 flow [2022-11-18 20:25:30,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 91 transitions, 272 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-18 20:25:30,022 INFO L231 Difference]: Finished difference. Result has 101 places, 89 transitions, 266 flow [2022-11-18 20:25:30,022 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=266, PETRI_PLACES=101, PETRI_TRANSITIONS=89} [2022-11-18 20:25:30,023 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 22 predicate places. [2022-11-18 20:25:30,023 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 89 transitions, 266 flow [2022-11-18 20:25:30,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 76.0) internal successors, (760), 10 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:30,024 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:25:30,024 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:30,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 20:25:30,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:30,231 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:25:30,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:30,231 INFO L85 PathProgramCache]: Analyzing trace with hash 195641243, now seen corresponding path program 3 times [2022-11-18 20:25:30,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:30,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287982737] [2022-11-18 20:25:30,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:30,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 20:25:30,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:30,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287982737] [2022-11-18 20:25:30,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287982737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:30,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072855731] [2022-11-18 20:25:30,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:25:30,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:30,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:30,498 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:30,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:25:30,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:25:30,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:30,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:25:30,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:30,773 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 20:25:30,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 20:25:30,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072855731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:30,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:30,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 20:25:30,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231026948] [2022-11-18 20:25:30,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:30,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:25:30,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:30,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:25:30,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:25:30,948 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-11-18 20:25:30,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 89 transitions, 266 flow. Second operand has 18 states, 18 states have (on average 76.94444444444444) internal successors, (1385), 18 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:30,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:25:30,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-11-18 20:25:30,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:25:31,217 INFO L130 PetriNetUnfolder]: 2/159 cut-off events. [2022-11-18 20:25:31,217 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-11-18 20:25:31,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 159 events. 2/159 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 4/162 useless extension candidates. Maximal degree in co-relation 265. Up to 11 conditions per place. [2022-11-18 20:25:31,220 INFO L137 encePairwiseOnDemand]: 86/92 looper letters, 13 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2022-11-18 20:25:31,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 107 transitions, 422 flow [2022-11-18 20:25:31,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:25:31,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 20:25:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1613 transitions. [2022-11-18 20:25:31,225 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8348861283643892 [2022-11-18 20:25:31,225 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1613 transitions. [2022-11-18 20:25:31,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1613 transitions. [2022-11-18 20:25:31,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:25:31,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1613 transitions. [2022-11-18 20:25:31,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 76.80952380952381) internal successors, (1613), 21 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:31,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 92.0) internal successors, (2024), 22 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:31,237 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 92.0) internal successors, (2024), 22 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:31,238 INFO L175 Difference]: Start difference. First operand has 101 places, 89 transitions, 266 flow. Second operand 21 states and 1613 transitions. [2022-11-18 20:25:31,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 107 transitions, 422 flow [2022-11-18 20:25:31,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 107 transitions, 416 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-18 20:25:31,250 INFO L231 Difference]: Finished difference. Result has 125 places, 102 transitions, 390 flow [2022-11-18 20:25:31,250 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=390, PETRI_PLACES=125, PETRI_TRANSITIONS=102} [2022-11-18 20:25:31,254 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 46 predicate places. [2022-11-18 20:25:31,254 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 102 transitions, 390 flow [2022-11-18 20:25:31,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 76.94444444444444) internal successors, (1385), 18 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:31,257 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:25:31,257 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:31,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:31,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:31,463 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:25:31,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:31,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1474879205, now seen corresponding path program 4 times [2022-11-18 20:25:31,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:31,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704838451] [2022-11-18 20:25:31,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:31,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 20:25:32,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:32,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704838451] [2022-11-18 20:25:32,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704838451] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:32,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559118108] [2022-11-18 20:25:32,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:25:32,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:32,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:32,136 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:32,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:25:32,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:25:32,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:32,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:25:32,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 20:25:32,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 20:25:32,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559118108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:32,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:32,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 20:25:33,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114837482] [2022-11-18 20:25:33,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:33,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 20:25:33,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:33,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 20:25:33,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 20:25:33,006 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-11-18 20:25:33,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 102 transitions, 390 flow. Second operand has 34 states, 34 states have (on average 76.97058823529412) internal successors, (2617), 34 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:33,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:25:33,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-11-18 20:25:33,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:25:33,840 INFO L130 PetriNetUnfolder]: 2/247 cut-off events. [2022-11-18 20:25:33,841 INFO L131 PetriNetUnfolder]: For 267/267 co-relation queries the response was YES. [2022-11-18 20:25:33,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 247 events. 2/247 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 8/254 useless extension candidates. Maximal degree in co-relation 515. Up to 27 conditions per place. [2022-11-18 20:25:33,845 INFO L137 encePairwiseOnDemand]: 86/92 looper letters, 21 selfloop transitions, 45 changer transitions 0/139 dead transitions. [2022-11-18 20:25:33,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 139 transitions, 810 flow [2022-11-18 20:25:33,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 20:25:33,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 20:25:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3449 transitions. [2022-11-18 20:25:33,856 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8330917874396135 [2022-11-18 20:25:33,857 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3449 transitions. [2022-11-18 20:25:33,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3449 transitions. [2022-11-18 20:25:33,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:25:33,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3449 transitions. [2022-11-18 20:25:33,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 76.64444444444445) internal successors, (3449), 45 states have internal predecessors, (3449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:33,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 92.0) internal successors, (4232), 46 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:33,880 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 92.0) internal successors, (4232), 46 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:33,880 INFO L175 Difference]: Start difference. First operand has 125 places, 102 transitions, 390 flow. Second operand 45 states and 3449 transitions. [2022-11-18 20:25:33,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 139 transitions, 810 flow [2022-11-18 20:25:33,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 139 transitions, 770 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 20:25:33,890 INFO L231 Difference]: Finished difference. Result has 172 places, 127 transitions, 668 flow [2022-11-18 20:25:33,890 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=668, PETRI_PLACES=172, PETRI_TRANSITIONS=127} [2022-11-18 20:25:33,891 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 93 predicate places. [2022-11-18 20:25:33,891 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 127 transitions, 668 flow [2022-11-18 20:25:33,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 76.97058823529412) internal successors, (2617), 34 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:33,893 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:25:33,893 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:33,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-18 20:25:34,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:34,100 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:25:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:34,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1963548891, now seen corresponding path program 5 times [2022-11-18 20:25:34,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:34,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481174571] [2022-11-18 20:25:34,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:34,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 1170 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 20:25:35,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:35,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481174571] [2022-11-18 20:25:35,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481174571] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:35,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430619683] [2022-11-18 20:25:35,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:25:35,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:35,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:35,632 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:35,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:25:35,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-18 20:25:35,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:35,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:25:35,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1170 trivial. 0 not checked. [2022-11-18 20:25:36,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1170 trivial. 0 not checked. [2022-11-18 20:25:36,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430619683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:36,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:36,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 9, 9] total 47 [2022-11-18 20:25:36,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882894183] [2022-11-18 20:25:36,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:36,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-18 20:25:36,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:36,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-18 20:25:36,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1803, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 20:25:36,453 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 92 [2022-11-18 20:25:36,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 127 transitions, 668 flow. Second operand has 47 states, 47 states have (on average 69.27659574468085) internal successors, (3256), 47 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:36,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:25:36,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 92 [2022-11-18 20:25:36,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:26:54,054 INFO L130 PetriNetUnfolder]: 2171/7669 cut-off events. [2022-11-18 20:26:54,055 INFO L131 PetriNetUnfolder]: For 19846/19846 co-relation queries the response was YES. [2022-11-18 20:26:54,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23257 conditions, 7669 events. 2171/7669 cut-off events. For 19846/19846 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 55540 event pairs, 18 based on Foata normal form. 311/7976 useless extension candidates. Maximal degree in co-relation 23232. Up to 899 conditions per place. [2022-11-18 20:26:54,156 INFO L137 encePairwiseOnDemand]: 81/92 looper letters, 934 selfloop transitions, 1927 changer transitions 0/2919 dead transitions. [2022-11-18 20:26:54,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1112 places, 2919 transitions, 26206 flow [2022-11-18 20:26:54,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 941 states. [2022-11-18 20:26:54,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 941 states. [2022-11-18 20:26:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 66116 transitions. [2022-11-18 20:26:54,268 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7637111306195998 [2022-11-18 20:26:54,269 INFO L72 ComplementDD]: Start complementDD. Operand 941 states and 66116 transitions. [2022-11-18 20:26:54,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 941 states and 66116 transitions. [2022-11-18 20:26:54,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:26:54,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 941 states and 66116 transitions. [2022-11-18 20:26:54,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 942 states, 941 states have (on average 70.2614240170032) internal successors, (66116), 941 states have internal predecessors, (66116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:54,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 942 states, 942 states have (on average 92.0) internal successors, (86664), 942 states have internal predecessors, (86664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:54,819 INFO L81 ComplementDD]: Finished complementDD. Result has 942 states, 942 states have (on average 92.0) internal successors, (86664), 942 states have internal predecessors, (86664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:54,819 INFO L175 Difference]: Start difference. First operand has 172 places, 127 transitions, 668 flow. Second operand 941 states and 66116 transitions. [2022-11-18 20:26:54,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1112 places, 2919 transitions, 26206 flow [2022-11-18 20:26:54,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1094 places, 2919 transitions, 25046 flow, removed 220 selfloop flow, removed 18 redundant places. [2022-11-18 20:26:54,948 INFO L231 Difference]: Finished difference. Result has 1374 places, 2114 transitions, 18804 flow [2022-11-18 20:26:54,949 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=941, PETRI_FLOW=18804, PETRI_PLACES=1374, PETRI_TRANSITIONS=2114} [2022-11-18 20:26:54,952 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1295 predicate places. [2022-11-18 20:26:54,953 INFO L495 AbstractCegarLoop]: Abstraction has has 1374 places, 2114 transitions, 18804 flow [2022-11-18 20:26:54,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 69.27659574468085) internal successors, (3256), 47 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:54,954 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:26:54,955 INFO L209 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 7, 7, 7, 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] [2022-11-18 20:26:54,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:55,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 20:26:55,162 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:26:55,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:55,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1271711925, now seen corresponding path program 6 times [2022-11-18 20:26:55,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:55,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372948068] [2022-11-18 20:26:55,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:55,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1511 backedges. 31 proven. 175 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2022-11-18 20:26:55,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:55,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372948068] [2022-11-18 20:26:55,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372948068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:55,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105666659] [2022-11-18 20:26:55,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:26:55,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:55,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:55,950 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:55,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:26:56,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-11-18 20:26:56,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:26:56,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:26:56,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1511 backedges. 31 proven. 175 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2022-11-18 20:26:56,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1511 backedges. 31 proven. 175 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2022-11-18 20:26:57,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105666659] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:57,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:57,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 20:26:57,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243585678] [2022-11-18 20:26:57,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:57,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 20:26:57,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:57,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 20:26:57,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 20:26:57,504 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 92 [2022-11-18 20:26:57,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1374 places, 2114 transitions, 18804 flow. Second operand has 34 states, 34 states have (on average 76.0) internal successors, (2584), 34 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:57,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:26:57,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 92 [2022-11-18 20:26:57,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:27:07,862 INFO L130 PetriNetUnfolder]: 2670/11867 cut-off events. [2022-11-18 20:27:07,862 INFO L131 PetriNetUnfolder]: For 1197827/1198908 co-relation queries the response was YES. [2022-11-18 20:27:08,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42867 conditions, 11867 events. 2670/11867 cut-off events. For 1197827/1198908 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 99253 event pairs, 38 based on Foata normal form. 89/11807 useless extension candidates. Maximal degree in co-relation 42562. Up to 1268 conditions per place. [2022-11-18 20:27:08,643 INFO L137 encePairwiseOnDemand]: 86/92 looper letters, 482 selfloop transitions, 2115 changer transitions 0/3623 dead transitions. [2022-11-18 20:27:08,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1418 places, 3623 transitions, 36338 flow [2022-11-18 20:27:08,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 20:27:08,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 20:27:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3405 transitions. [2022-11-18 20:27:08,651 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.822463768115942 [2022-11-18 20:27:08,651 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3405 transitions. [2022-11-18 20:27:08,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3405 transitions. [2022-11-18 20:27:08,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:27:08,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3405 transitions. [2022-11-18 20:27:08,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 75.66666666666667) internal successors, (3405), 45 states have internal predecessors, (3405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:08,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 92.0) internal successors, (4232), 46 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:08,671 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 92.0) internal successors, (4232), 46 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:08,671 INFO L175 Difference]: Start difference. First operand has 1374 places, 2114 transitions, 18804 flow. Second operand 45 states and 3405 transitions. [2022-11-18 20:27:08,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1418 places, 3623 transitions, 36338 flow [2022-11-18 20:27:12,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1370 places, 3623 transitions, 32698 flow, removed 698 selfloop flow, removed 48 redundant places. [2022-11-18 20:27:12,754 INFO L231 Difference]: Finished difference. Result has 1379 places, 3289 transitions, 29374 flow [2022-11-18 20:27:12,757 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=15916, PETRI_DIFFERENCE_MINUEND_PLACES=1326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1034, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1033, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=29374, PETRI_PLACES=1379, PETRI_TRANSITIONS=3289} [2022-11-18 20:27:12,758 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1300 predicate places. [2022-11-18 20:27:12,758 INFO L495 AbstractCegarLoop]: Abstraction has has 1379 places, 3289 transitions, 29374 flow [2022-11-18 20:27:12,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 76.0) internal successors, (2584), 34 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:12,759 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:27:12,759 INFO L209 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:12,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:12,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:12,966 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:27:12,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:12,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1026900943, now seen corresponding path program 7 times [2022-11-18 20:27:12,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:12,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547591397] [2022-11-18 20:27:12,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:12,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 0 proven. 1336 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2022-11-18 20:27:14,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:14,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547591397] [2022-11-18 20:27:14,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547591397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:14,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893202473] [2022-11-18 20:27:14,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:27:14,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:14,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:14,783 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:14,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:27:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:15,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 20:27:15,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 0 proven. 1336 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2022-11-18 20:27:15,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 0 proven. 1336 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2022-11-18 20:27:16,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893202473] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:16,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:16,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 43 [2022-11-18 20:27:16,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381908439] [2022-11-18 20:27:16,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:16,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-18 20:27:16,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:16,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-18 20:27:16,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:27:16,780 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-11-18 20:27:16,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1379 places, 3289 transitions, 29374 flow. Second operand has 43 states, 43 states have (on average 77.02325581395348) internal successors, (3312), 43 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:16,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:27:16,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-11-18 20:27:16,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:27:29,103 INFO L130 PetriNetUnfolder]: 2895/12850 cut-off events. [2022-11-18 20:27:29,103 INFO L131 PetriNetUnfolder]: For 642053/643720 co-relation queries the response was YES. [2022-11-18 20:27:29,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52384 conditions, 12850 events. 2895/12850 cut-off events. For 642053/643720 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 110589 event pairs, 127 based on Foata normal form. 331/12993 useless extension candidates. Maximal degree in co-relation 52070. Up to 1334 conditions per place. [2022-11-18 20:27:29,955 INFO L137 encePairwiseOnDemand]: 86/92 looper letters, 26 selfloop transitions, 1029 changer transitions 0/3374 dead transitions. [2022-11-18 20:27:29,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1438 places, 3374 transitions, 32998 flow [2022-11-18 20:27:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-18 20:27:29,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-18 20:27:29,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4590 transitions. [2022-11-18 20:27:29,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8315217391304348 [2022-11-18 20:27:29,972 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4590 transitions. [2022-11-18 20:27:29,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4590 transitions. [2022-11-18 20:27:29,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:27:29,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4590 transitions. [2022-11-18 20:27:29,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 76.5) internal successors, (4590), 60 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:29,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 92.0) internal successors, (5612), 61 states have internal predecessors, (5612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:29,996 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 92.0) internal successors, (5612), 61 states have internal predecessors, (5612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:29,997 INFO L175 Difference]: Start difference. First operand has 1379 places, 3289 transitions, 29374 flow. Second operand 60 states and 4590 transitions. [2022-11-18 20:27:29,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1438 places, 3374 transitions, 32998 flow [2022-11-18 20:27:36,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1420 places, 3374 transitions, 31306 flow, removed 0 selfloop flow, removed 18 redundant places. [2022-11-18 20:27:36,163 INFO L231 Difference]: Finished difference. Result has 1425 places, 3358 transitions, 31165 flow [2022-11-18 20:27:36,167 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=27682, PETRI_DIFFERENCE_MINUEND_PLACES=1361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=962, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=31165, PETRI_PLACES=1425, PETRI_TRANSITIONS=3358} [2022-11-18 20:27:36,168 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1346 predicate places. [2022-11-18 20:27:36,168 INFO L495 AbstractCegarLoop]: Abstraction has has 1425 places, 3358 transitions, 31165 flow [2022-11-18 20:27:36,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 77.02325581395348) internal successors, (3312), 43 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:36,169 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:27:36,170 INFO L209 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:36,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:36,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:27:36,383 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:27:36,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:36,383 INFO L85 PathProgramCache]: Analyzing trace with hash -654352107, now seen corresponding path program 8 times [2022-11-18 20:27:36,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:36,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204658375] [2022-11-18 20:27:36,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:36,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 607 proven. 855 refuted. 0 times theorem prover too weak. 1503 trivial. 0 not checked. [2022-11-18 20:27:38,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:38,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204658375] [2022-11-18 20:27:38,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204658375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:38,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819860999] [2022-11-18 20:27:38,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:27:38,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:38,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:38,014 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:38,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:27:38,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:27:38,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:27:38,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 20:27:38,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 607 proven. 855 refuted. 0 times theorem prover too weak. 1503 trivial. 0 not checked. [2022-11-18 20:27:38,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 607 proven. 855 refuted. 0 times theorem prover too weak. 1503 trivial. 0 not checked. [2022-11-18 20:27:39,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819860999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:39,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:39,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 43 [2022-11-18 20:27:39,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195335951] [2022-11-18 20:27:39,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:39,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-18 20:27:39,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:39,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-18 20:27:39,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:27:39,276 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 92 [2022-11-18 20:27:39,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1425 places, 3358 transitions, 31165 flow. Second operand has 43 states, 43 states have (on average 76.04651162790698) internal successors, (3270), 43 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:39,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:27:39,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 92 [2022-11-18 20:27:39,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:27:55,022 INFO L130 PetriNetUnfolder]: 3919/17306 cut-off events. [2022-11-18 20:27:55,022 INFO L131 PetriNetUnfolder]: For 2343838/2346221 co-relation queries the response was YES. [2022-11-18 20:27:56,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70937 conditions, 17306 events. 3919/17306 cut-off events. For 2343838/2346221 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 157717 event pairs, 167 based on Foata normal form. 240/17280 useless extension candidates. Maximal degree in co-relation 70618. Up to 1775 conditions per place. [2022-11-18 20:27:56,233 INFO L137 encePairwiseOnDemand]: 86/92 looper letters, 717 selfloop transitions, 2820 changer transitions 0/4632 dead transitions. [2022-11-18 20:27:56,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1484 places, 4632 transitions, 52365 flow [2022-11-18 20:27:56,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-18 20:27:56,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-18 20:27:56,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4532 transitions. [2022-11-18 20:27:56,252 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8210144927536231 [2022-11-18 20:27:56,252 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4532 transitions. [2022-11-18 20:27:56,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4532 transitions. [2022-11-18 20:27:56,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:27:56,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4532 transitions. [2022-11-18 20:27:56,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 75.53333333333333) internal successors, (4532), 60 states have internal predecessors, (4532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:56,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 92.0) internal successors, (5612), 61 states have internal predecessors, (5612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:56,269 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 92.0) internal successors, (5612), 61 states have internal predecessors, (5612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:56,269 INFO L175 Difference]: Start difference. First operand has 1425 places, 3358 transitions, 31165 flow. Second operand 60 states and 4532 transitions. [2022-11-18 20:27:56,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1484 places, 4632 transitions, 52365 flow [2022-11-18 20:28:03,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1409 places, 4632 transitions, 50135 flow, removed 155 selfloop flow, removed 75 redundant places. [2022-11-18 20:28:03,317 INFO L231 Difference]: Finished difference. Result has 1415 places, 4110 transitions, 42763 flow [2022-11-18 20:28:03,321 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=28935, PETRI_DIFFERENCE_MINUEND_PLACES=1350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=42763, PETRI_PLACES=1415, PETRI_TRANSITIONS=4110} [2022-11-18 20:28:03,322 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1336 predicate places. [2022-11-18 20:28:03,322 INFO L495 AbstractCegarLoop]: Abstraction has has 1415 places, 4110 transitions, 42763 flow [2022-11-18 20:28:03,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 76.04651162790698) internal successors, (3270), 43 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:03,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:03,323 INFO L209 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:03,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:03,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:03,536 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:28:03,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:03,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1678086839, now seen corresponding path program 9 times [2022-11-18 20:28:03,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:03,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079388529] [2022-11-18 20:28:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:03,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:09,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:09,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079388529] [2022-11-18 20:28:09,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079388529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:09,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431608001] [2022-11-18 20:28:09,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:28:09,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:09,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:09,879 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:09,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950fe950-b001-44b9-92e8-115492db3a2a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:28:10,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-18 20:28:10,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:10,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 168 conjunts are in the unsatisfiable core [2022-11-18 20:28:10,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:12,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:14,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431608001] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:14,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:14,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 70 [2022-11-18 20:28:14,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594199971] [2022-11-18 20:28:14,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:14,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-18 20:28:14,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:14,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-18 20:28:14,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2022-11-18 20:28:14,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2022-11-18 20:28:14,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1415 places, 4110 transitions, 42763 flow. Second operand has 70 states, 70 states have (on average 71.32857142857142) internal successors, (4993), 70 states have internal predecessors, (4993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:14,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:14,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2022-11-18 20:28:14,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand